{I"
class:ETI"BundledAsset; FI"logical_path; TI"application.js; TI"pathname; TI"0$root/app/assets/javascripts/application.js; FI"content_type; TI"application/javascript; TI"
mtime; Tl+<ßSI"length; TiYŽI"digest; TI"%697cb2f8defd0b49150390e706624e6a; FI"source; TI"YŽ/*!
 * jQuery JavaScript Library v1.11.0
 * http://jquery.com/
 *
 * Includes Sizzle.js
 * http://sizzlejs.com/
 *
 * Copyright 2005, 2014 jQuery Foundation, Inc. and other contributors
 * Released under the MIT license
 * http://jquery.org/license
 *
 * Date: 2014-01-23T21:02Z
 */


(function( global, factory ) {

	if ( typeof module === "object" && typeof module.exports === "object" ) {
		// For CommonJS and CommonJS-like environments where a proper window is present,
		// execute the factory and get jQuery
		// For environments that do not inherently posses a window with a document
		// (such as Node.js), expose a jQuery-making factory as module.exports
		// This accentuates the need for the creation of a real window
		// e.g. var jQuery = require("jquery")(window);
		// See ticket #14549 for more info
		module.exports = global.document ?
			factory( global, true ) :
			function( w ) {
				if ( !w.document ) {
					throw new Error( "jQuery requires a window with a document" );
				}
				return factory( w );
			};
	} else {
		factory( global );
	}

// Pass this if window is not defined yet
}(typeof window !== "undefined" ? window : this, function( window, noGlobal ) {

// Can't do this because several apps including ASP.NET trace
// the stack via arguments.caller.callee and Firefox dies if
// you try to trace through "use strict" call chains. (#13335)
// Support: Firefox 18+
//

var deletedIds = [];

var slice = deletedIds.slice;

var concat = deletedIds.concat;

var push = deletedIds.push;

var indexOf = deletedIds.indexOf;

var class2type = {};

var toString = class2type.toString;

var hasOwn = class2type.hasOwnProperty;

var trim = "".trim;

var support = {};


var
	version = "1.11.0",

	// Define a local copy of jQuery
	jQuery = function( selector, context ) {
		// The jQuery object is actually just the init constructor 'enhanced'
		// Need init if jQuery is called (just allow error to be thrown if not included)
		return new jQuery.fn.init( selector, context );
	},

	// Make sure we trim BOM and NBSP (here's looking at you, Safari 5.0 and IE)
	rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g,

	// Matches dashed string for camelizing
	rmsPrefix = /^-ms-/,
	rdashAlpha = /-([\da-z])/gi,

	// Used by jQuery.camelCase as callback to replace()
	fcamelCase = function( all, letter ) {
		return letter.toUpperCase();
	};

jQuery.fn = jQuery.prototype = {
	// The current version of jQuery being used
	jquery: version,

	constructor: jQuery,

	// Start with an empty selector
	selector: "",

	// The default length of a jQuery object is 0
	length: 0,

	toArray: function() {
		return slice.call( this );
	},

	// Get the Nth element in the matched element set OR
	// Get the whole matched element set as a clean array
	get: function( num ) {
		return num != null ?

			// Return a 'clean' array
			( num < 0 ? this[ num + this.length ] : this[ num ] ) :

			// Return just the object
			slice.call( this );
	},

	// Take an array of elements and push it onto the stack
	// (returning the new matched element set)
	pushStack: function( elems ) {

		// Build a new jQuery matched element set
		var ret = jQuery.merge( this.constructor(), elems );

		// Add the old object onto the stack (as a reference)
		ret.prevObject = this;
		ret.context = this.context;

		// Return the newly-formed element set
		return ret;
	},

	// Execute a callback for every element in the matched set.
	// (You can seed the arguments with an array of args, but this is
	// only used internally.)
	each: function( callback, args ) {
		return jQuery.each( this, callback, args );
	},

	map: function( callback ) {
		return this.pushStack( jQuery.map(this, function( elem, i ) {
			return callback.call( elem, i, elem );
		}));
	},

	slice: function() {
		return this.pushStack( slice.apply( this, arguments ) );
	},

	first: function() {
		return this.eq( 0 );
	},

	last: function() {
		return this.eq( -1 );
	},

	eq: function( i ) {
		var len = this.length,
			j = +i + ( i < 0 ? len : 0 );
		return this.pushStack( j >= 0 && j < len ? [ this[j] ] : [] );
	},

	end: function() {
		return this.prevObject || this.constructor(null);
	},

	// For internal use only.
	// Behaves like an Array's method, not like a jQuery method.
	push: push,
	sort: deletedIds.sort,
	splice: deletedIds.splice
};

jQuery.extend = jQuery.fn.extend = function() {
	var src, copyIsArray, copy, name, options, clone,
		target = arguments[0] || {},
		i = 1,
		length = arguments.length,
		deep = false;

	// Handle a deep copy situation
	if ( typeof target === "boolean" ) {
		deep = target;

		// skip the boolean and the target
		target = arguments[ i ] || {};
		i++;
	}

	// Handle case when target is a string or something (possible in deep copy)
	if ( typeof target !== "object" && !jQuery.isFunction(target) ) {
		target = {};
	}

	// extend jQuery itself if only one argument is passed
	if ( i === length ) {
		target = this;
		i--;
	}

	for ( ; i < length; i++ ) {
		// Only deal with non-null/undefined values
		if ( (options = arguments[ i ]) != null ) {
			// Extend the base object
			for ( name in options ) {
				src = target[ name ];
				copy = options[ name ];

				// Prevent never-ending loop
				if ( target === copy ) {
					continue;
				}

				// Recurse if we're merging plain objects or arrays
				if ( deep && copy && ( jQuery.isPlainObject(copy) || (copyIsArray = jQuery.isArray(copy)) ) ) {
					if ( copyIsArray ) {
						copyIsArray = false;
						clone = src && jQuery.isArray(src) ? src : [];

					} else {
						clone = src && jQuery.isPlainObject(src) ? src : {};
					}

					// Never move original objects, clone them
					target[ name ] = jQuery.extend( deep, clone, copy );

				// Don't bring in undefined values
				} else if ( copy !== undefined ) {
					target[ name ] = copy;
				}
			}
		}
	}

	// Return the modified object
	return target;
};

jQuery.extend({
	// Unique for each copy of jQuery on the page
	expando: "jQuery" + ( version + Math.random() ).replace( /\D/g, "" ),

	// Assume jQuery is ready without the ready module
	isReady: true,

	error: function( msg ) {
		throw new Error( msg );
	},

	noop: function() {},

	// See test/unit/core.js for details concerning isFunction.
	// Since version 1.3, DOM methods and functions like alert
	// aren't supported. They return false on IE (#2968).
	isFunction: function( obj ) {
		return jQuery.type(obj) === "function";
	},

	isArray: Array.isArray || function( obj ) {
		return jQuery.type(obj) === "array";
	},

	isWindow: function( obj ) {
		/* jshint eqeqeq: false */
		return obj != null && obj == obj.window;
	},

	isNumeric: function( obj ) {
		// parseFloat NaNs numeric-cast false positives (null|true|false|"")
		// ...but misinterprets leading-number strings, particularly hex literals ("0x...")
		// subtraction forces infinities to NaN
		return obj - parseFloat( obj ) >= 0;
	},

	isEmptyObject: function( obj ) {
		var name;
		for ( name in obj ) {
			return false;
		}
		return true;
	},

	isPlainObject: function( obj ) {
		var key;

		// Must be an Object.
		// Because of IE, we also have to check the presence of the constructor property.
		// Make sure that DOM nodes and window objects don't pass through, as well
		if ( !obj || jQuery.type(obj) !== "object" || obj.nodeType || jQuery.isWindow( obj ) ) {
			return false;
		}

		try {
			// Not own constructor property must be Object
			if ( obj.constructor &&
				!hasOwn.call(obj, "constructor") &&
				!hasOwn.call(obj.constructor.prototype, "isPrototypeOf") ) {
				return false;
			}
		} catch ( e ) {
			// IE8,9 Will throw exceptions on certain host objects #9897
			return false;
		}

		// Support: IE<9
		// Handle iteration over inherited properties before own properties.
		if ( support.ownLast ) {
			for ( key in obj ) {
				return hasOwn.call( obj, key );
			}
		}

		// Own properties are enumerated firstly, so to speed up,
		// if last one is own, then all properties are own.
		for ( key in obj ) {}

		return key === undefined || hasOwn.call( obj, key );
	},

	type: function( obj ) {
		if ( obj == null ) {
			return obj + "";
		}
		return typeof obj === "object" || typeof obj === "function" ?
			class2type[ toString.call(obj) ] || "object" :
			typeof obj;
	},

	// Evaluates a script in a global context
	// Workarounds based on findings by Jim Driscoll
	// http://weblogs.java.net/blog/driscoll/archive/2009/09/08/eval-javascript-global-context
	globalEval: function( data ) {
		if ( data && jQuery.trim( data ) ) {
			// We use execScript on Internet Explorer
			// We use an anonymous function so that context is window
			// rather than jQuery in Firefox
			( window.execScript || function( data ) {
				window[ "eval" ].call( window, data );
			} )( data );
		}
	},

	// Convert dashed to camelCase; used by the css and data modules
	// Microsoft forgot to hump their vendor prefix (#9572)
	camelCase: function( string ) {
		return string.replace( rmsPrefix, "ms-" ).replace( rdashAlpha, fcamelCase );
	},

	nodeName: function( elem, name ) {
		return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
	},

	// args is for internal usage only
	each: function( obj, callback, args ) {
		var value,
			i = 0,
			length = obj.length,
			isArray = isArraylike( obj );

		if ( args ) {
			if ( isArray ) {
				for ( ; i < length; i++ ) {
					value = callback.apply( obj[ i ], args );

					if ( value === false ) {
						break;
					}
				}
			} else {
				for ( i in obj ) {
					value = callback.apply( obj[ i ], args );

					if ( value === false ) {
						break;
					}
				}
			}

		// A special, fast, case for the most common use of each
		} else {
			if ( isArray ) {
				for ( ; i < length; i++ ) {
					value = callback.call( obj[ i ], i, obj[ i ] );

					if ( value === false ) {
						break;
					}
				}
			} else {
				for ( i in obj ) {
					value = callback.call( obj[ i ], i, obj[ i ] );

					if ( value === false ) {
						break;
					}
				}
			}
		}

		return obj;
	},

	// Use native String.trim function wherever possible
	trim: trim && !trim.call("\uFEFF\xA0") ?
		function( text ) {
			return text == null ?
				"" :
				trim.call( text );
		} :

		// Otherwise use our own trimming functionality
		function( text ) {
			return text == null ?
				"" :
				( text + "" ).replace( rtrim, "" );
		},

	// results is for internal usage only
	makeArray: function( arr, results ) {
		var ret = results || [];

		if ( arr != null ) {
			if ( isArraylike( Object(arr) ) ) {
				jQuery.merge( ret,
					typeof arr === "string" ?
					[ arr ] : arr
				);
			} else {
				push.call( ret, arr );
			}
		}

		return ret;
	},

	inArray: function( elem, arr, i ) {
		var len;

		if ( arr ) {
			if ( indexOf ) {
				return indexOf.call( arr, elem, i );
			}

			len = arr.length;
			i = i ? i < 0 ? Math.max( 0, len + i ) : i : 0;

			for ( ; i < len; i++ ) {
				// Skip accessing in sparse arrays
				if ( i in arr && arr[ i ] === elem ) {
					return i;
				}
			}
		}

		return -1;
	},

	merge: function( first, second ) {
		var len = +second.length,
			j = 0,
			i = first.length;

		while ( j < len ) {
			first[ i++ ] = second[ j++ ];
		}

		// Support: IE<9
		// Workaround casting of .length to NaN on otherwise arraylike objects (e.g., NodeLists)
		if ( len !== len ) {
			while ( second[j] !== undefined ) {
				first[ i++ ] = second[ j++ ];
			}
		}

		first.length = i;

		return first;
	},

	grep: function( elems, callback, invert ) {
		var callbackInverse,
			matches = [],
			i = 0,
			length = elems.length,
			callbackExpect = !invert;

		// Go through the array, only saving the items
		// that pass the validator function
		for ( ; i < length; i++ ) {
			callbackInverse = !callback( elems[ i ], i );
			if ( callbackInverse !== callbackExpect ) {
				matches.push( elems[ i ] );
			}
		}

		return matches;
	},

	// arg is for internal usage only
	map: function( elems, callback, arg ) {
		var value,
			i = 0,
			length = elems.length,
			isArray = isArraylike( elems ),
			ret = [];

		// Go through the array, translating each of the items to their new values
		if ( isArray ) {
			for ( ; i < length; i++ ) {
				value = callback( elems[ i ], i, arg );

				if ( value != null ) {
					ret.push( value );
				}
			}

		// Go through every key on the object,
		} else {
			for ( i in elems ) {
				value = callback( elems[ i ], i, arg );

				if ( value != null ) {
					ret.push( value );
				}
			}
		}

		// Flatten any nested arrays
		return concat.apply( [], ret );
	},

	// A global GUID counter for objects
	guid: 1,

	// Bind a function to a context, optionally partially applying any
	// arguments.
	proxy: function( fn, context ) {
		var args, proxy, tmp;

		if ( typeof context === "string" ) {
			tmp = fn[ context ];
			context = fn;
			fn = tmp;
		}

		// Quick check to determine if target is callable, in the spec
		// this throws a TypeError, but we will just return undefined.
		if ( !jQuery.isFunction( fn ) ) {
			return undefined;
		}

		// Simulated bind
		args = slice.call( arguments, 2 );
		proxy = function() {
			return fn.apply( context || this, args.concat( slice.call( arguments ) ) );
		};

		// Set the guid of unique handler to the same of original handler, so it can be removed
		proxy.guid = fn.guid = fn.guid || jQuery.guid++;

		return proxy;
	},

	now: function() {
		return +( new Date() );
	},

	// jQuery.support is not used in Core but other projects attach their
	// properties to it so it needs to exist.
	support: support
});

// Populate the class2type map
jQuery.each("Boolean Number String Function Array Date RegExp Object Error".split(" "), function(i, name) {
	class2type[ "[object " + name + "]" ] = name.toLowerCase();
});

function isArraylike( obj ) {
	var length = obj.length,
		type = jQuery.type( obj );

	if ( type === "function" || jQuery.isWindow( obj ) ) {
		return false;
	}

	if ( obj.nodeType === 1 && length ) {
		return true;
	}

	return type === "array" || length === 0 ||
		typeof length === "number" && length > 0 && ( length - 1 ) in obj;
}
var Sizzle =
/*!
 * Sizzle CSS Selector Engine v1.10.16
 * http://sizzlejs.com/
 *
 * Copyright 2013 jQuery Foundation, Inc. and other contributors
 * Released under the MIT license
 * http://jquery.org/license
 *
 * Date: 2014-01-13
 */
(function( window ) {

var i,
	support,
	Expr,
	getText,
	isXML,
	compile,
	outermostContext,
	sortInput,
	hasDuplicate,

	// Local document vars
	setDocument,
	document,
	docElem,
	documentIsHTML,
	rbuggyQSA,
	rbuggyMatches,
	matches,
	contains,

	// Instance-specific data
	expando = "sizzle" + -(new Date()),
	preferredDoc = window.document,
	dirruns = 0,
	done = 0,
	classCache = createCache(),
	tokenCache = createCache(),
	compilerCache = createCache(),
	sortOrder = function( a, b ) {
		if ( a === b ) {
			hasDuplicate = true;
		}
		return 0;
	},

	// General-purpose constants
	strundefined = typeof undefined,
	MAX_NEGATIVE = 1 << 31,

	// Instance methods
	hasOwn = ({}).hasOwnProperty,
	arr = [],
	pop = arr.pop,
	push_native = arr.push,
	push = arr.push,
	slice = arr.slice,
	// Use a stripped-down indexOf if we can't use a native one
	indexOf = arr.indexOf || function( elem ) {
		var i = 0,
			len = this.length;
		for ( ; i < len; i++ ) {
			if ( this[i] === elem ) {
				return i;
			}
		}
		return -1;
	},

	booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",

	// Regular expressions

	// Whitespace characters http://www.w3.org/TR/css3-selectors/#whitespace
	whitespace = "[\\x20\\t\\r\\n\\f]",
	// http://www.w3.org/TR/css3-syntax/#characters
	characterEncoding = "(?:\\\\.|[\\w-]|[^\\x00-\\xa0])+",

	// Loosely modeled on CSS identifier characters
	// An unquoted value should be a CSS identifier http://www.w3.org/TR/css3-selectors/#attribute-selectors
	// Proper syntax: http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
	identifier = characterEncoding.replace( "w", "w#" ),

	// Acceptable operators http://www.w3.org/TR/selectors/#attribute-selectors
	attributes = "\\[" + whitespace + "*(" + characterEncoding + ")" + whitespace +
		"*(?:([*^$|!~]?=)" + whitespace + "*(?:(['\"])((?:\\\\.|[^\\\\])*?)\\3|(" + identifier + ")|)|)" + whitespace + "*\\]",

	// Prefer arguments quoted,
	//   then not containing pseudos/brackets,
	//   then attribute selectors/non-parenthetical expressions,
	//   then anything else
	// These preferences are here to reduce the number of selectors
	//   needing tokenize in the PSEUDO preFilter
	pseudos = ":(" + characterEncoding + ")(?:\\(((['\"])((?:\\\\.|[^\\\\])*?)\\3|((?:\\\\.|[^\\\\()[\\]]|" + attributes.replace( 3, 8 ) + ")*)|.*)\\)|)",

	// Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter
	rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),

	rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),
	rcombinators = new RegExp( "^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace + "*" ),

	rattributeQuotes = new RegExp( "=" + whitespace + "*([^\\]'\"]*?)" + whitespace + "*\\]", "g" ),

	rpseudo = new RegExp( pseudos ),
	ridentifier = new RegExp( "^" + identifier + "$" ),

	matchExpr = {
		"ID": new RegExp( "^#(" + characterEncoding + ")" ),
		"CLASS": new RegExp( "^\\.(" + characterEncoding + ")" ),
		"TAG": new RegExp( "^(" + characterEncoding.replace( "w", "w*" ) + ")" ),
		"ATTR": new RegExp( "^" + attributes ),
		"PSEUDO": new RegExp( "^" + pseudos ),
		"CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\(" + whitespace +
			"*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
			"*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
		"bool": new RegExp( "^(?:" + booleans + ")$", "i" ),
		// For use in libraries implementing .is()
		// We use this for POS matching in `select`
		"needsContext": new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" +
			whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" )
	},

	rinputs = /^(?:input|select|textarea|button)$/i,
	rheader = /^h\d$/i,

	rnative = /^[^{]+\{\s*\[native \w/,

	// Easily-parseable/retrievable ID or TAG or CLASS selectors
	rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/,

	rsibling = /[+~]/,
	rescape = /'|\\/g,

	// CSS escapes http://www.w3.org/TR/CSS21/syndata.html#escaped-characters
	runescape = new RegExp( "\\\\([\\da-f]{1,6}" + whitespace + "?|(" + whitespace + ")|.)", "ig" ),
	funescape = function( _, escaped, escapedWhitespace ) {
		var high = "0x" + escaped - 0x10000;
		// NaN means non-codepoint
		// Support: Firefox
		// Workaround erroneous numeric interpretation of +"0x"
		return high !== high || escapedWhitespace ?
			escaped :
			high < 0 ?
				// BMP codepoint
				String.fromCharCode( high + 0x10000 ) :
				// Supplemental Plane codepoint (surrogate pair)
				String.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );
	};

// Optimize for push.apply( _, NodeList )
try {
	push.apply(
		(arr = slice.call( preferredDoc.childNodes )),
		preferredDoc.childNodes
	);
	// Support: Android<4.0
	// Detect silently failing push.apply
	arr[ preferredDoc.childNodes.length ].nodeType;
} catch ( e ) {
	push = { apply: arr.length ?

		// Leverage slice if possible
		function( target, els ) {
			push_native.apply( target, slice.call(els) );
		} :

		// Support: IE<9
		// Otherwise append directly
		function( target, els ) {
			var j = target.length,
				i = 0;
			// Can't trust NodeList.length
			while ( (target[j++] = els[i++]) ) {}
			target.length = j - 1;
		}
	};
}

function Sizzle( selector, context, results, seed ) {
	var match, elem, m, nodeType,
		// QSA vars
		i, groups, old, nid, newContext, newSelector;

	if ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {
		setDocument( context );
	}

	context = context || document;
	results = results || [];

	if ( !selector || typeof selector !== "string" ) {
		return results;
	}

	if ( (nodeType = context.nodeType) !== 1 && nodeType !== 9 ) {
		return [];
	}

	if ( documentIsHTML && !seed ) {

		// Shortcuts
		if ( (match = rquickExpr.exec( selector )) ) {
			// Speed-up: Sizzle("#ID")
			if ( (m = match[1]) ) {
				if ( nodeType === 9 ) {
					elem = context.getElementById( m );
					// Check parentNode to catch when Blackberry 4.6 returns
					// nodes that are no longer in the document (jQuery #6963)
					if ( elem && elem.parentNode ) {
						// Handle the case where IE, Opera, and Webkit return items
						// by name instead of ID
						if ( elem.id === m ) {
							results.push( elem );
							return results;
						}
					} else {
						return results;
					}
				} else {
					// Context is not a document
					if ( context.ownerDocument && (elem = context.ownerDocument.getElementById( m )) &&
						contains( context, elem ) && elem.id === m ) {
						results.push( elem );
						return results;
					}
				}

			// Speed-up: Sizzle("TAG")
			} else if ( match[2] ) {
				push.apply( results, context.getElementsByTagName( selector ) );
				return results;

			// Speed-up: Sizzle(".CLASS")
			} else if ( (m = match[3]) && support.getElementsByClassName && context.getElementsByClassName ) {
				push.apply( results, context.getElementsByClassName( m ) );
				return results;
			}
		}

		// QSA path
		if ( support.qsa && (!rbuggyQSA || !rbuggyQSA.test( selector )) ) {
			nid = old = expando;
			newContext = context;
			newSelector = nodeType === 9 && selector;

			// qSA works strangely on Element-rooted queries
			// We can work around this by specifying an extra ID on the root
			// and working up from there (Thanks to Andrew Dupont for the technique)
			// IE 8 doesn't work on object elements
			if ( nodeType === 1 && context.nodeName.toLowerCase() !== "object" ) {
				groups = tokenize( selector );

				if ( (old = context.getAttribute("id")) ) {
					nid = old.replace( rescape, "\\$&" );
				} else {
					context.setAttribute( "id", nid );
				}
				nid = "[id='" + nid + "'] ";

				i = groups.length;
				while ( i-- ) {
					groups[i] = nid + toSelector( groups[i] );
				}
				newContext = rsibling.test( selector ) && testContext( context.parentNode ) || context;
				newSelector = groups.join(",");
			}

			if ( newSelector ) {
				try {
					push.apply( results,
						newContext.querySelectorAll( newSelector )
					);
					return results;
				} catch(qsaError) {
				} finally {
					if ( !old ) {
						context.removeAttribute("id");
					}
				}
			}
		}
	}

	// All others
	return select( selector.replace( rtrim, "$1" ), context, results, seed );
}

/**
 * Create key-value caches of limited size
 * @returns {Function(string, Object)} Returns the Object data after storing it on itself with
 *	property name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength)
 *	deleting the oldest entry
 */
function createCache() {
	var keys = [];

	function cache( key, value ) {
		// Use (key + " ") to avoid collision with native prototype properties (see Issue #157)
		if ( keys.push( key + " " ) > Expr.cacheLength ) {
			// Only keep the most recent entries
			delete cache[ keys.shift() ];
		}
		return (cache[ key + " " ] = value);
	}
	return cache;
}

/**
 * Mark a function for special use by Sizzle
 * @param {Function} fn The function to mark
 */
function markFunction( fn ) {
	fn[ expando ] = true;
	return fn;
}

/**
 * Support testing using an element
 * @param {Function} fn Passed the created div and expects a boolean result
 */
function assert( fn ) {
	var div = document.createElement("div");

	try {
		return !!fn( div );
	} catch (e) {
		return false;
	} finally {
		// Remove from its parent by default
		if ( div.parentNode ) {
			div.parentNode.removeChild( div );
		}
		// release memory in IE
		div = null;
	}
}

/**
 * Adds the same handler for all of the specified attrs
 * @param {String} attrs Pipe-separated list of attributes
 * @param {Function} handler The method that will be applied
 */
function addHandle( attrs, handler ) {
	var arr = attrs.split("|"),
		i = attrs.length;

	while ( i-- ) {
		Expr.attrHandle[ arr[i] ] = handler;
	}
}

/**
 * Checks document order of two siblings
 * @param {Element} a
 * @param {Element} b
 * @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b
 */
function siblingCheck( a, b ) {
	var cur = b && a,
		diff = cur && a.nodeType === 1 && b.nodeType === 1 &&
			( ~b.sourceIndex || MAX_NEGATIVE ) -
			( ~a.sourceIndex || MAX_NEGATIVE );

	// Use IE sourceIndex if available on both nodes
	if ( diff ) {
		return diff;
	}

	// Check if b follows a
	if ( cur ) {
		while ( (cur = cur.nextSibling) ) {
			if ( cur === b ) {
				return -1;
			}
		}
	}

	return a ? 1 : -1;
}

/**
 * Returns a function to use in pseudos for input types
 * @param {String} type
 */
function createInputPseudo( type ) {
	return function( elem ) {
		var name = elem.nodeName.toLowerCase();
		return name === "input" && elem.type === type;
	};
}

/**
 * Returns a function to use in pseudos for buttons
 * @param {String} type
 */
function createButtonPseudo( type ) {
	return function( elem ) {
		var name = elem.nodeName.toLowerCase();
		return (name === "input" || name === "button") && elem.type === type;
	};
}

/**
 * Returns a function to use in pseudos for positionals
 * @param {Function} fn
 */
function createPositionalPseudo( fn ) {
	return markFunction(function( argument ) {
		argument = +argument;
		return markFunction(function( seed, matches ) {
			var j,
				matchIndexes = fn( [], seed.length, argument ),
				i = matchIndexes.length;

			// Match elements found at the specified indexes
			while ( i-- ) {
				if ( seed[ (j = matchIndexes[i]) ] ) {
					seed[j] = !(matches[j] = seed[j]);
				}
			}
		});
	});
}

/**
 * Checks a node for validity as a Sizzle context
 * @param {Element|Object=} context
 * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value
 */
function testContext( context ) {
	return context && typeof context.getElementsByTagName !== strundefined && context;
}

// Expose support vars for convenience
support = Sizzle.support = {};

/**
 * Detects XML nodes
 * @param {Element|Object} elem An element or a document
 * @returns {Boolean} True iff elem is a non-HTML XML node
 */
isXML = Sizzle.isXML = function( elem ) {
	// documentElement is verified for cases where it doesn't yet exist
	// (such as loading iframes in IE - #4833)
	var documentElement = elem && (elem.ownerDocument || elem).documentElement;
	return documentElement ? documentElement.nodeName !== "HTML" : false;
};

/**
 * Sets document-related variables once based on the current document
 * @param {Element|Object} [doc] An element or document object to use to set the document
 * @returns {Object} Returns the current document
 */
setDocument = Sizzle.setDocument = function( node ) {
	var hasCompare,
		doc = node ? node.ownerDocument || node : preferredDoc,
		parent = doc.defaultView;

	// If no document and documentElement is available, return
	if ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {
		return document;
	}

	// Set our document
	document = doc;
	docElem = doc.documentElement;

	// Support tests
	documentIsHTML = !isXML( doc );

	// Support: IE>8
	// If iframe document is assigned to "document" variable and if iframe has been reloaded,
	// IE will throw "permission denied" error when accessing "document" variable, see jQuery #13936
	// IE6-8 do not support the defaultView property so parent will be undefined
	if ( parent && parent !== parent.top ) {
		// IE11 does not have attachEvent, so all must suffer
		if ( parent.addEventListener ) {
			parent.addEventListener( "unload", function() {
				setDocument();
			}, false );
		} else if ( parent.attachEvent ) {
			parent.attachEvent( "onunload", function() {
				setDocument();
			});
		}
	}

	/* Attributes
	---------------------------------------------------------------------- */

	// Support: IE<8
	// Verify that getAttribute really returns attributes and not properties (excepting IE8 booleans)
	support.attributes = assert(function( div ) {
		div.className = "i";
		return !div.getAttribute("className");
	});

	/* getElement(s)By*
	---------------------------------------------------------------------- */

	// Check if getElementsByTagName("*") returns only elements
	support.getElementsByTagName = assert(function( div ) {
		div.appendChild( doc.createComment("") );
		return !div.getElementsByTagName("*").length;
	});

	// Check if getElementsByClassName can be trusted
	support.getElementsByClassName = rnative.test( doc.getElementsByClassName ) && assert(function( div ) {
		div.innerHTML = "<div class='a'></div><div class='a i'></div>";

		// Support: Safari<4
		// Catch class over-caching
		div.firstChild.className = "i";
		// Support: Opera<10
		// Catch gEBCN failure to find non-leading classes
		return div.getElementsByClassName("i").length === 2;
	});

	// Support: IE<10
	// Check if getElementById returns elements by name
	// The broken getElementById methods don't pick up programatically-set names,
	// so use a roundabout getElementsByName test
	support.getById = assert(function( div ) {
		docElem.appendChild( div ).id = expando;
		return !doc.getElementsByName || !doc.getElementsByName( expando ).length;
	});

	// ID find and filter
	if ( support.getById ) {
		Expr.find["ID"] = function( id, context ) {
			if ( typeof context.getElementById !== strundefined && documentIsHTML ) {
				var m = context.getElementById( id );
				// Check parentNode to catch when Blackberry 4.6 returns
				// nodes that are no longer in the document #6963
				return m && m.parentNode ? [m] : [];
			}
		};
		Expr.filter["ID"] = function( id ) {
			var attrId = id.replace( runescape, funescape );
			return function( elem ) {
				return elem.getAttribute("id") === attrId;
			};
		};
	} else {
		// Support: IE6/7
		// getElementById is not reliable as a find shortcut
		delete Expr.find["ID"];

		Expr.filter["ID"] =  function( id ) {
			var attrId = id.replace( runescape, funescape );
			return function( elem ) {
				var node = typeof elem.getAttributeNode !== strundefined && elem.getAttributeNode("id");
				return node && node.value === attrId;
			};
		};
	}

	// Tag
	Expr.find["TAG"] = support.getElementsByTagName ?
		function( tag, context ) {
			if ( typeof context.getElementsByTagName !== strundefined ) {
				return context.getElementsByTagName( tag );
			}
		} :
		function( tag, context ) {
			var elem,
				tmp = [],
				i = 0,
				results = context.getElementsByTagName( tag );

			// Filter out possible comments
			if ( tag === "*" ) {
				while ( (elem = results[i++]) ) {
					if ( elem.nodeType === 1 ) {
						tmp.push( elem );
					}
				}

				return tmp;
			}
			return results;
		};

	// Class
	Expr.find["CLASS"] = support.getElementsByClassName && function( className, context ) {
		if ( typeof context.getElementsByClassName !== strundefined && documentIsHTML ) {
			return context.getElementsByClassName( className );
		}
	};

	/* QSA/matchesSelector
	---------------------------------------------------------------------- */

	// QSA and matchesSelector support

	// matchesSelector(:active) reports false when true (IE9/Opera 11.5)
	rbuggyMatches = [];

	// qSa(:focus) reports false when true (Chrome 21)
	// We allow this because of a bug in IE8/9 that throws an error
	// whenever `document.activeElement` is accessed on an iframe
	// So, we allow :focus to pass through QSA all the time to avoid the IE error
	// See http://bugs.jquery.com/ticket/13378
	rbuggyQSA = [];

	if ( (support.qsa = rnative.test( doc.querySelectorAll )) ) {
		// Build QSA regex
		// Regex strategy adopted from Diego Perini
		assert(function( div ) {
			// Select is set to empty string on purpose
			// This is to test IE's treatment of not explicitly
			// setting a boolean content attribute,
			// since its presence should be enough
			// http://bugs.jquery.com/ticket/12359
			div.innerHTML = "<select t=''><option selected=''></option></select>";

			// Support: IE8, Opera 10-12
			// Nothing should be selected when empty strings follow ^= or $= or *=
			if ( div.querySelectorAll("[t^='']").length ) {
				rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:''|\"\")" );
			}

			// Support: IE8
			// Boolean attributes and "value" are not treated correctly
			if ( !div.querySelectorAll("[selected]").length ) {
				rbuggyQSA.push( "\\[" + whitespace + "*(?:value|" + booleans + ")" );
			}

			// Webkit/Opera - :checked should return selected option elements
			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
			// IE8 throws error here and will not see later tests
			if ( !div.querySelectorAll(":checked").length ) {
				rbuggyQSA.push(":checked");
			}
		});

		assert(function( div ) {
			// Support: Windows 8 Native Apps
			// The type and name attributes are restricted during .innerHTML assignment
			var input = doc.createElement("input");
			input.setAttribute( "type", "hidden" );
			div.appendChild( input ).setAttribute( "name", "D" );

			// Support: IE8
			// Enforce case-sensitivity of name attribute
			if ( div.querySelectorAll("[name=d]").length ) {
				rbuggyQSA.push( "name" + whitespace + "*[*^$|!~]?=" );
			}

			// FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
			// IE8 throws error here and will not see later tests
			if ( !div.querySelectorAll(":enabled").length ) {
				rbuggyQSA.push( ":enabled", ":disabled" );
			}

			// Opera 10-11 does not throw on post-comma invalid pseudos
			div.querySelectorAll("*,:x");
			rbuggyQSA.push(",.*:");
		});
	}

	if ( (support.matchesSelector = rnative.test( (matches = docElem.webkitMatchesSelector ||
		docElem.mozMatchesSelector ||
		docElem.oMatchesSelector ||
		docElem.msMatchesSelector) )) ) {

		assert(function( div ) {
			// Check to see if it's possible to do matchesSelector
			// on a disconnected node (IE 9)
			support.disconnectedMatch = matches.call( div, "div" );

			// This should fail with an exception
			// Gecko does not error, returns false instead
			matches.call( div, "[s!='']:x" );
			rbuggyMatches.push( "!=", pseudos );
		});
	}

	rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
	rbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join("|") );

	/* Contains
	---------------------------------------------------------------------- */
	hasCompare = rnative.test( docElem.compareDocumentPosition );

	// Element contains another
	// Purposefully does not implement inclusive descendent
	// As in, an element does not contain itself
	contains = hasCompare || rnative.test( docElem.contains ) ?
		function( a, b ) {
			var adown = a.nodeType === 9 ? a.documentElement : a,
				bup = b && b.parentNode;
			return a === bup || !!( bup && bup.nodeType === 1 && (
				adown.contains ?
					adown.contains( bup ) :
					a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
			));
		} :
		function( a, b ) {
			if ( b ) {
				while ( (b = b.parentNode) ) {
					if ( b === a ) {
						return true;
					}
				}
			}
			return false;
		};

	/* Sorting
	---------------------------------------------------------------------- */

	// Document order sorting
	sortOrder = hasCompare ?
	function( a, b ) {

		// Flag for duplicate removal
		if ( a === b ) {
			hasDuplicate = true;
			return 0;
		}

		// Sort on method existence if only one input has compareDocumentPosition
		var compare = !a.compareDocumentPosition - !b.compareDocumentPosition;
		if ( compare ) {
			return compare;
		}

		// Calculate position if both inputs belong to the same document
		compare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?
			a.compareDocumentPosition( b ) :

			// Otherwise we know they are disconnected
			1;

		// Disconnected nodes
		if ( compare & 1 ||
			(!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {

			// Choose the first element that is related to our preferred document
			if ( a === doc || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {
				return -1;
			}
			if ( b === doc || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {
				return 1;
			}

			// Maintain original order
			return sortInput ?
				( indexOf.call( sortInput, a ) - indexOf.call( sortInput, b ) ) :
				0;
		}

		return compare & 4 ? -1 : 1;
	} :
	function( a, b ) {
		// Exit early if the nodes are identical
		if ( a === b ) {
			hasDuplicate = true;
			return 0;
		}

		var cur,
			i = 0,
			aup = a.parentNode,
			bup = b.parentNode,
			ap = [ a ],
			bp = [ b ];

		// Parentless nodes are either documents or disconnected
		if ( !aup || !bup ) {
			return a === doc ? -1 :
				b === doc ? 1 :
				aup ? -1 :
				bup ? 1 :
				sortInput ?
				( indexOf.call( sortInput, a ) - indexOf.call( sortInput, b ) ) :
				0;

		// If the nodes are siblings, we can do a quick check
		} else if ( aup === bup ) {
			return siblingCheck( a, b );
		}

		// Otherwise we need full lists of their ancestors for comparison
		cur = a;
		while ( (cur = cur.parentNode) ) {
			ap.unshift( cur );
		}
		cur = b;
		while ( (cur = cur.parentNode) ) {
			bp.unshift( cur );
		}

		// Walk down the tree looking for a discrepancy
		while ( ap[i] === bp[i] ) {
			i++;
		}

		return i ?
			// Do a sibling check if the nodes have a common ancestor
			siblingCheck( ap[i], bp[i] ) :

			// Otherwise nodes in our document sort first
			ap[i] === preferredDoc ? -1 :
			bp[i] === preferredDoc ? 1 :
			0;
	};

	return doc;
};

Sizzle.matches = function( expr, elements ) {
	return Sizzle( expr, null, null, elements );
};

Sizzle.matchesSelector = function( elem, expr ) {
	// Set document vars if needed
	if ( ( elem.ownerDocument || elem ) !== document ) {
		setDocument( elem );
	}

	// Make sure that attribute selectors are quoted
	expr = expr.replace( rattributeQuotes, "='$1']" );

	if ( support.matchesSelector && documentIsHTML &&
		( !rbuggyMatches || !rbuggyMatches.test( expr ) ) &&
		( !rbuggyQSA     || !rbuggyQSA.test( expr ) ) ) {

		try {
			var ret = matches.call( elem, expr );

			// IE 9's matchesSelector returns false on disconnected nodes
			if ( ret || support.disconnectedMatch ||
					// As well, disconnected nodes are said to be in a document
					// fragment in IE 9
					elem.document && elem.document.nodeType !== 11 ) {
				return ret;
			}
		} catch(e) {}
	}

	return Sizzle( expr, document, null, [elem] ).length > 0;
};

Sizzle.contains = function( context, elem ) {
	// Set document vars if needed
	if ( ( context.ownerDocument || context ) !== document ) {
		setDocument( context );
	}
	return contains( context, elem );
};

Sizzle.attr = function( elem, name ) {
	// Set document vars if needed
	if ( ( elem.ownerDocument || elem ) !== document ) {
		setDocument( elem );
	}

	var fn = Expr.attrHandle[ name.toLowerCase() ],
		// Don't get fooled by Object.prototype properties (jQuery #13807)
		val = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?
			fn( elem, name, !documentIsHTML ) :
			undefined;

	return val !== undefined ?
		val :
		support.attributes || !documentIsHTML ?
			elem.getAttribute( name ) :
			(val = elem.getAttributeNode(name)) && val.specified ?
				val.value :
				null;
};

Sizzle.error = function( msg ) {
	throw new Error( "Syntax error, unrecognized expression: " + msg );
};

/**
 * Document sorting and removing duplicates
 * @param {ArrayLike} results
 */
Sizzle.uniqueSort = function( results ) {
	var elem,
		duplicates = [],
		j = 0,
		i = 0;

	// Unless we *know* we can detect duplicates, assume their presence
	hasDuplicate = !support.detectDuplicates;
	sortInput = !support.sortStable && results.slice( 0 );
	results.sort( sortOrder );

	if ( hasDuplicate ) {
		while ( (elem = results[i++]) ) {
			if ( elem === results[ i ] ) {
				j = duplicates.push( i );
			}
		}
		while ( j-- ) {
			results.splice( duplicates[ j ], 1 );
		}
	}

	// Clear input after sorting to release objects
	// See https://github.com/jquery/sizzle/pull/225
	sortInput = null;

	return results;
};

/**
 * Utility function for retrieving the text value of an array of DOM nodes
 * @param {Array|Element} elem
 */
getText = Sizzle.getText = function( elem ) {
	var node,
		ret = "",
		i = 0,
		nodeType = elem.nodeType;

	if ( !nodeType ) {
		// If no nodeType, this is expected to be an array
		while ( (node = elem[i++]) ) {
			// Do not traverse comment nodes
			ret += getText( node );
		}
	} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
		// Use textContent for elements
		// innerText usage removed for consistency of new lines (jQuery #11153)
		if ( typeof elem.textContent === "string" ) {
			return elem.textContent;
		} else {
			// Traverse its children
			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
				ret += getText( elem );
			}
		}
	} else if ( nodeType === 3 || nodeType === 4 ) {
		return elem.nodeValue;
	}
	// Do not include comment or processing instruction nodes

	return ret;
};

Expr = Sizzle.selectors = {

	// Can be adjusted by the user
	cacheLength: 50,

	createPseudo: markFunction,

	match: matchExpr,

	attrHandle: {},

	find: {},

	relative: {
		">": { dir: "parentNode", first: true },
		" ": { dir: "parentNode" },
		"+": { dir: "previousSibling", first: true },
		"~": { dir: "previousSibling" }
	},

	preFilter: {
		"ATTR": function( match ) {
			match[1] = match[1].replace( runescape, funescape );

			// Move the given value to match[3] whether quoted or unquoted
			match[3] = ( match[4] || match[5] || "" ).replace( runescape, funescape );

			if ( match[2] === "~=" ) {
				match[3] = " " + match[3] + " ";
			}

			return match.slice( 0, 4 );
		},

		"CHILD": function( match ) {
			/* matches from matchExpr["CHILD"]
				1 type (only|nth|...)
				2 what (child|of-type)
				3 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
				4 xn-component of xn+y argument ([+-]?\d*n|)
				5 sign of xn-component
				6 x of xn-component
				7 sign of y-component
				8 y of y-component
			*/
			match[1] = match[1].toLowerCase();

			if ( match[1].slice( 0, 3 ) === "nth" ) {
				// nth-* requires argument
				if ( !match[3] ) {
					Sizzle.error( match[0] );
				}

				// numeric x and y parameters for Expr.filter.CHILD
				// remember that false/true cast respectively to 0/1
				match[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === "even" || match[3] === "odd" ) );
				match[5] = +( ( match[7] + match[8] ) || match[3] === "odd" );

			// other types prohibit arguments
			} else if ( match[3] ) {
				Sizzle.error( match[0] );
			}

			return match;
		},

		"PSEUDO": function( match ) {
			var excess,
				unquoted = !match[5] && match[2];

			if ( matchExpr["CHILD"].test( match[0] ) ) {
				return null;
			}

			// Accept quoted arguments as-is
			if ( match[3] && match[4] !== undefined ) {
				match[2] = match[4];

			// Strip excess characters from unquoted arguments
			} else if ( unquoted && rpseudo.test( unquoted ) &&
				// Get excess from tokenize (recursively)
				(excess = tokenize( unquoted, true )) &&
				// advance to the next closing parenthesis
				(excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length) ) {

				// excess is a negative index
				match[0] = match[0].slice( 0, excess );
				match[2] = unquoted.slice( 0, excess );
			}

			// Return only captures needed by the pseudo filter method (type and argument)
			return match.slice( 0, 3 );
		}
	},

	filter: {

		"TAG": function( nodeNameSelector ) {
			var nodeName = nodeNameSelector.replace( runescape, funescape ).toLowerCase();
			return nodeNameSelector === "*" ?
				function() { return true; } :
				function( elem ) {
					return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
				};
		},

		"CLASS": function( className ) {
			var pattern = classCache[ className + " " ];

			return pattern ||
				(pattern = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" )) &&
				classCache( className, function( elem ) {
					return pattern.test( typeof elem.className === "string" && elem.className || typeof elem.getAttribute !== strundefined && elem.getAttribute("class") || "" );
				});
		},

		"ATTR": function( name, operator, check ) {
			return function( elem ) {
				var result = Sizzle.attr( elem, name );

				if ( result == null ) {
					return operator === "!=";
				}
				if ( !operator ) {
					return true;
				}

				result += "";

				return operator === "=" ? result === check :
					operator === "!=" ? result !== check :
					operator === "^=" ? check && result.indexOf( check ) === 0 :
					operator === "*=" ? check && result.indexOf( check ) > -1 :
					operator === "$=" ? check && result.slice( -check.length ) === check :
					operator === "~=" ? ( " " + result + " " ).indexOf( check ) > -1 :
					operator === "|=" ? result === check || result.slice( 0, check.length + 1 ) === check + "-" :
					false;
			};
		},

		"CHILD": function( type, what, argument, first, last ) {
			var simple = type.slice( 0, 3 ) !== "nth",
				forward = type.slice( -4 ) !== "last",
				ofType = what === "of-type";

			return first === 1 && last === 0 ?

				// Shortcut for :nth-*(n)
				function( elem ) {
					return !!elem.parentNode;
				} :

				function( elem, context, xml ) {
					var cache, outerCache, node, diff, nodeIndex, start,
						dir = simple !== forward ? "nextSibling" : "previousSibling",
						parent = elem.parentNode,
						name = ofType && elem.nodeName.toLowerCase(),
						useCache = !xml && !ofType;

					if ( parent ) {

						// :(first|last|only)-(child|of-type)
						if ( simple ) {
							while ( dir ) {
								node = elem;
								while ( (node = node[ dir ]) ) {
									if ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) {
										return false;
									}
								}
								// Reverse direction for :only-* (if we haven't yet done so)
								start = dir = type === "only" && !start && "nextSibling";
							}
							return true;
						}

						start = [ forward ? parent.firstChild : parent.lastChild ];

						// non-xml :nth-child(...) stores cache data on `parent`
						if ( forward && useCache ) {
							// Seek `elem` from a previously-cached index
							outerCache = parent[ expando ] || (parent[ expando ] = {});
							cache = outerCache[ type ] || [];
							nodeIndex = cache[0] === dirruns && cache[1];
							diff = cache[0] === dirruns && cache[2];
							node = nodeIndex && parent.childNodes[ nodeIndex ];

							while ( (node = ++nodeIndex && node && node[ dir ] ||

								// Fallback to seeking `elem` from the start
								(diff = nodeIndex = 0) || start.pop()) ) {

								// When found, cache indexes on `parent` and break
								if ( node.nodeType === 1 && ++diff && node === elem ) {
									outerCache[ type ] = [ dirruns, nodeIndex, diff ];
									break;
								}
							}

						// Use previously-cached element index if available
						} else if ( useCache && (cache = (elem[ expando ] || (elem[ expando ] = {}))[ type ]) && cache[0] === dirruns ) {
							diff = cache[1];

						// xml :nth-child(...) or :nth-last-child(...) or :nth(-last)?-of-type(...)
						} else {
							// Use the same loop as above to seek `elem` from the start
							while ( (node = ++nodeIndex && node && node[ dir ] ||
								(diff = nodeIndex = 0) || start.pop()) ) {

								if ( ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) && ++diff ) {
									// Cache the index of each encountered element
									if ( useCache ) {
										(node[ expando ] || (node[ expando ] = {}))[ type ] = [ dirruns, diff ];
									}

									if ( node === elem ) {
										break;
									}
								}
							}
						}

						// Incorporate the offset, then check against cycle size
						diff -= last;
						return diff === first || ( diff % first === 0 && diff / first >= 0 );
					}
				};
		},

		"PSEUDO": function( pseudo, argument ) {
			// pseudo-class names are case-insensitive
			// http://www.w3.org/TR/selectors/#pseudo-classes
			// Prioritize by case sensitivity in case custom pseudos are added with uppercase letters
			// Remember that setFilters inherits from pseudos
			var args,
				fn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||
					Sizzle.error( "unsupported pseudo: " + pseudo );

			// The user may use createPseudo to indicate that
			// arguments are needed to create the filter function
			// just as Sizzle does
			if ( fn[ expando ] ) {
				return fn( argument );
			}

			// But maintain support for old signatures
			if ( fn.length > 1 ) {
				args = [ pseudo, pseudo, "", argument ];
				return Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?
					markFunction(function( seed, matches ) {
						var idx,
							matched = fn( seed, argument ),
							i = matched.length;
						while ( i-- ) {
							idx = indexOf.call( seed, matched[i] );
							seed[ idx ] = !( matches[ idx ] = matched[i] );
						}
					}) :
					function( elem ) {
						return fn( elem, 0, args );
					};
			}

			return fn;
		}
	},

	pseudos: {
		// Potentially complex pseudos
		"not": markFunction(function( selector ) {
			// Trim the selector passed to compile
			// to avoid treating leading and trailing
			// spaces as combinators
			var input = [],
				results = [],
				matcher = compile( selector.replace( rtrim, "$1" ) );

			return matcher[ expando ] ?
				markFunction(function( seed, matches, context, xml ) {
					var elem,
						unmatched = matcher( seed, null, xml, [] ),
						i = seed.length;

					// Match elements unmatched by `matcher`
					while ( i-- ) {
						if ( (elem = unmatched[i]) ) {
							seed[i] = !(matches[i] = elem);
						}
					}
				}) :
				function( elem, context, xml ) {
					input[0] = elem;
					matcher( input, null, xml, results );
					return !results.pop();
				};
		}),

		"has": markFunction(function( selector ) {
			return function( elem ) {
				return Sizzle( selector, elem ).length > 0;
			};
		}),

		"contains": markFunction(function( text ) {
			return function( elem ) {
				return ( elem.textContent || elem.innerText || getText( elem ) ).indexOf( text ) > -1;
			};
		}),

		// "Whether an element is represented by a :lang() selector
		// is based solely on the element's language value
		// being equal to the identifier C,
		// or beginning with the identifier C immediately followed by "-".
		// The matching of C against the element's language value is performed case-insensitively.
		// The identifier C does not have to be a valid language name."
		// http://www.w3.org/TR/selectors/#lang-pseudo
		"lang": markFunction( function( lang ) {
			// lang value must be a valid identifier
			if ( !ridentifier.test(lang || "") ) {
				Sizzle.error( "unsupported lang: " + lang );
			}
			lang = lang.replace( runescape, funescape ).toLowerCase();
			return function( elem ) {
				var elemLang;
				do {
					if ( (elemLang = documentIsHTML ?
						elem.lang :
						elem.getAttribute("xml:lang") || elem.getAttribute("lang")) ) {

						elemLang = elemLang.toLowerCase();
						return elemLang === lang || elemLang.indexOf( lang + "-" ) === 0;
					}
				} while ( (elem = elem.parentNode) && elem.nodeType === 1 );
				return false;
			};
		}),

		// Miscellaneous
		"target": function( elem ) {
			var hash = window.location && window.location.hash;
			return hash && hash.slice( 1 ) === elem.id;
		},

		"root": function( elem ) {
			return elem === docElem;
		},

		"focus": function( elem ) {
			return elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);
		},

		// Boolean properties
		"enabled": function( elem ) {
			return elem.disabled === false;
		},

		"disabled": function( elem ) {
			return elem.disabled === true;
		},

		"checked": function( elem ) {
			// In CSS3, :checked should return both checked and selected elements
			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
			var nodeName = elem.nodeName.toLowerCase();
			return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
		},

		"selected": function( elem ) {
			// Accessing this property makes selected-by-default
			// options in Safari work properly
			if ( elem.parentNode ) {
				elem.parentNode.selectedIndex;
			}

			return elem.selected === true;
		},

		// Contents
		"empty": function( elem ) {
			// http://www.w3.org/TR/selectors/#empty-pseudo
			// :empty is negated by element (1) or content nodes (text: 3; cdata: 4; entity ref: 5),
			//   but not by others (comment: 8; processing instruction: 7; etc.)
			// nodeType < 6 works because attributes (2) do not appear as children
			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
				if ( elem.nodeType < 6 ) {
					return false;
				}
			}
			return true;
		},

		"parent": function( elem ) {
			return !Expr.pseudos["empty"]( elem );
		},

		// Element/input types
		"header": function( elem ) {
			return rheader.test( elem.nodeName );
		},

		"input": function( elem ) {
			return rinputs.test( elem.nodeName );
		},

		"button": function( elem ) {
			var name = elem.nodeName.toLowerCase();
			return name === "input" && elem.type === "button" || name === "button";
		},

		"text": function( elem ) {
			var attr;
			return elem.nodeName.toLowerCase() === "input" &&
				elem.type === "text" &&

				// Support: IE<8
				// New HTML5 attribute values (e.g., "search") appear with elem.type === "text"
				( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === "text" );
		},

		// Position-in-collection
		"first": createPositionalPseudo(function() {
			return [ 0 ];
		}),

		"last": createPositionalPseudo(function( matchIndexes, length ) {
			return [ length - 1 ];
		}),

		"eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
			return [ argument < 0 ? argument + length : argument ];
		}),

		"even": createPositionalPseudo(function( matchIndexes, length ) {
			var i = 0;
			for ( ; i < length; i += 2 ) {
				matchIndexes.push( i );
			}
			return matchIndexes;
		}),

		"odd": createPositionalPseudo(function( matchIndexes, length ) {
			var i = 1;
			for ( ; i < length; i += 2 ) {
				matchIndexes.push( i );
			}
			return matchIndexes;
		}),

		"lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
			var i = argument < 0 ? argument + length : argument;
			for ( ; --i >= 0; ) {
				matchIndexes.push( i );
			}
			return matchIndexes;
		}),

		"gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
			var i = argument < 0 ? argument + length : argument;
			for ( ; ++i < length; ) {
				matchIndexes.push( i );
			}
			return matchIndexes;
		})
	}
};

Expr.pseudos["nth"] = Expr.pseudos["eq"];

// Add button/input type pseudos
for ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {
	Expr.pseudos[ i ] = createInputPseudo( i );
}
for ( i in { submit: true, reset: true } ) {
	Expr.pseudos[ i ] = createButtonPseudo( i );
}

// Easy API for creating new setFilters
function setFilters() {}
setFilters.prototype = Expr.filters = Expr.pseudos;
Expr.setFilters = new setFilters();

function tokenize( selector, parseOnly ) {
	var matched, match, tokens, type,
		soFar, groups, preFilters,
		cached = tokenCache[ selector + " " ];

	if ( cached ) {
		return parseOnly ? 0 : cached.slice( 0 );
	}

	soFar = selector;
	groups = [];
	preFilters = Expr.preFilter;

	while ( soFar ) {

		// Comma and first run
		if ( !matched || (match = rcomma.exec( soFar )) ) {
			if ( match ) {
				// Don't consume trailing commas as valid
				soFar = soFar.slice( match[0].length ) || soFar;
			}
			groups.push( (tokens = []) );
		}

		matched = false;

		// Combinators
		if ( (match = rcombinators.exec( soFar )) ) {
			matched = match.shift();
			tokens.push({
				value: matched,
				// Cast descendant combinators to space
				type: match[0].replace( rtrim, " " )
			});
			soFar = soFar.slice( matched.length );
		}

		// Filters
		for ( type in Expr.filter ) {
			if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
				(match = preFilters[ type ]( match ))) ) {
				matched = match.shift();
				tokens.push({
					value: matched,
					type: type,
					matches: match
				});
				soFar = soFar.slice( matched.length );
			}
		}

		if ( !matched ) {
			break;
		}
	}

	// Return the length of the invalid excess
	// if we're just parsing
	// Otherwise, throw an error or return tokens
	return parseOnly ?
		soFar.length :
		soFar ?
			Sizzle.error( selector ) :
			// Cache the tokens
			tokenCache( selector, groups ).slice( 0 );
}

function toSelector( tokens ) {
	var i = 0,
		len = tokens.length,
		selector = "";
	for ( ; i < len; i++ ) {
		selector += tokens[i].value;
	}
	return selector;
}

function addCombinator( matcher, combinator, base ) {
	var dir = combinator.dir,
		checkNonElements = base && dir === "parentNode",
		doneName = done++;

	return combinator.first ?
		// Check against closest ancestor/preceding element
		function( elem, context, xml ) {
			while ( (elem = elem[ dir ]) ) {
				if ( elem.nodeType === 1 || checkNonElements ) {
					return matcher( elem, context, xml );
				}
			}
		} :

		// Check against all ancestor/preceding elements
		function( elem, context, xml ) {
			var oldCache, outerCache,
				newCache = [ dirruns, doneName ];

			// We can't set arbitrary data on XML nodes, so they don't benefit from dir caching
			if ( xml ) {
				while ( (elem = elem[ dir ]) ) {
					if ( elem.nodeType === 1 || checkNonElements ) {
						if ( matcher( elem, context, xml ) ) {
							return true;
						}
					}
				}
			} else {
				while ( (elem = elem[ dir ]) ) {
					if ( elem.nodeType === 1 || checkNonElements ) {
						outerCache = elem[ expando ] || (elem[ expando ] = {});
						if ( (oldCache = outerCache[ dir ]) &&
							oldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {

							// Assign to newCache so results back-propagate to previous elements
							return (newCache[ 2 ] = oldCache[ 2 ]);
						} else {
							// Reuse newcache so results back-propagate to previous elements
							outerCache[ dir ] = newCache;

							// A match means we're done; a fail means we have to keep checking
							if ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {
								return true;
							}
						}
					}
				}
			}
		};
}

function elementMatcher( matchers ) {
	return matchers.length > 1 ?
		function( elem, context, xml ) {
			var i = matchers.length;
			while ( i-- ) {
				if ( !matchers[i]( elem, context, xml ) ) {
					return false;
				}
			}
			return true;
		} :
		matchers[0];
}

function condense( unmatched, map, filter, context, xml ) {
	var elem,
		newUnmatched = [],
		i = 0,
		len = unmatched.length,
		mapped = map != null;

	for ( ; i < len; i++ ) {
		if ( (elem = unmatched[i]) ) {
			if ( !filter || filter( elem, context, xml ) ) {
				newUnmatched.push( elem );
				if ( mapped ) {
					map.push( i );
				}
			}
		}
	}

	return newUnmatched;
}

function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postSelector ) {
	if ( postFilter && !postFilter[ expando ] ) {
		postFilter = setMatcher( postFilter );
	}
	if ( postFinder && !postFinder[ expando ] ) {
		postFinder = setMatcher( postFinder, postSelector );
	}
	return markFunction(function( seed, results, context, xml ) {
		var temp, i, elem,
			preMap = [],
			postMap = [],
			preexisting = results.length,

			// Get initial elements from seed or context
			elems = seed || multipleContexts( selector || "*", context.nodeType ? [ context ] : context, [] ),

			// Prefilter to get matcher input, preserving a map for seed-results synchronization
			matcherIn = preFilter && ( seed || !selector ) ?
				condense( elems, preMap, preFilter, context, xml ) :
				elems,

			matcherOut = matcher ?
				// If we have a postFinder, or filtered seed, or non-seed postFilter or preexisting results,
				postFinder || ( seed ? preFilter : preexisting || postFilter ) ?

					// ...intermediate processing is necessary
					[] :

					// ...otherwise use results directly
					results :
				matcherIn;

		// Find primary matches
		if ( matcher ) {
			matcher( matcherIn, matcherOut, context, xml );
		}

		// Apply postFilter
		if ( postFilter ) {
			temp = condense( matcherOut, postMap );
			postFilter( temp, [], context, xml );

			// Un-match failing elements by moving them back to matcherIn
			i = temp.length;
			while ( i-- ) {
				if ( (elem = temp[i]) ) {
					matcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);
				}
			}
		}

		if ( seed ) {
			if ( postFinder || preFilter ) {
				if ( postFinder ) {
					// Get the final matcherOut by condensing this intermediate into postFinder contexts
					temp = [];
					i = matcherOut.length;
					while ( i-- ) {
						if ( (elem = matcherOut[i]) ) {
							// Restore matcherIn since elem is not yet a final match
							temp.push( (matcherIn[i] = elem) );
						}
					}
					postFinder( null, (matcherOut = []), temp, xml );
				}

				// Move matched elements from seed to results to keep them synchronized
				i = matcherOut.length;
				while ( i-- ) {
					if ( (elem = matcherOut[i]) &&
						(temp = postFinder ? indexOf.call( seed, elem ) : preMap[i]) > -1 ) {

						seed[temp] = !(results[temp] = elem);
					}
				}
			}

		// Add elements to results, through postFinder if defined
		} else {
			matcherOut = condense(
				matcherOut === results ?
					matcherOut.splice( preexisting, matcherOut.length ) :
					matcherOut
			);
			if ( postFinder ) {
				postFinder( null, results, matcherOut, xml );
			} else {
				push.apply( results, matcherOut );
			}
		}
	});
}

function matcherFromTokens( tokens ) {
	var checkContext, matcher, j,
		len = tokens.length,
		leadingRelative = Expr.relative[ tokens[0].type ],
		implicitRelative = leadingRelative || Expr.relative[" "],
		i = leadingRelative ? 1 : 0,

		// The foundational matcher ensures that elements are reachable from top-level context(s)
		matchContext = addCombinator( function( elem ) {
			return elem === checkContext;
		}, implicitRelative, true ),
		matchAnyContext = addCombinator( function( elem ) {
			return indexOf.call( checkContext, elem ) > -1;
		}, implicitRelative, true ),
		matchers = [ function( elem, context, xml ) {
			return ( !leadingRelative && ( xml || context !== outermostContext ) ) || (
				(checkContext = context).nodeType ?
					matchContext( elem, context, xml ) :
					matchAnyContext( elem, context, xml ) );
		} ];

	for ( ; i < len; i++ ) {
		if ( (matcher = Expr.relative[ tokens[i].type ]) ) {
			matchers = [ addCombinator(elementMatcher( matchers ), matcher) ];
		} else {
			matcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );

			// Return special upon seeing a positional matcher
			if ( matcher[ expando ] ) {
				// Find the next relative operator (if any) for proper handling
				j = ++i;
				for ( ; j < len; j++ ) {
					if ( Expr.relative[ tokens[j].type ] ) {
						break;
					}
				}
				return setMatcher(
					i > 1 && elementMatcher( matchers ),
					i > 1 && toSelector(
						// If the preceding token was a descendant combinator, insert an implicit any-element `*`
						tokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === " " ? "*" : "" })
					).replace( rtrim, "$1" ),
					matcher,
					i < j && matcherFromTokens( tokens.slice( i, j ) ),
					j < len && matcherFromTokens( (tokens = tokens.slice( j )) ),
					j < len && toSelector( tokens )
				);
			}
			matchers.push( matcher );
		}
	}

	return elementMatcher( matchers );
}

function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
	var bySet = setMatchers.length > 0,
		byElement = elementMatchers.length > 0,
		superMatcher = function( seed, context, xml, results, outermost ) {
			var elem, j, matcher,
				matchedCount = 0,
				i = "0",
				unmatched = seed && [],
				setMatched = [],
				contextBackup = outermostContext,
				// We must always have either seed elements or outermost context
				elems = seed || byElement && Expr.find["TAG"]( "*", outermost ),
				// Use integer dirruns iff this is the outermost matcher
				dirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),
				len = elems.length;

			if ( outermost ) {
				outermostContext = context !== document && context;
			}

			// Add elements passing elementMatchers directly to results
			// Keep `i` a string if there are no elements so `matchedCount` will be "00" below
			// Support: IE<9, Safari
			// Tolerate NodeList properties (IE: "length"; Safari: <number>) matching elements by id
			for ( ; i !== len && (elem = elems[i]) != null; i++ ) {
				if ( byElement && elem ) {
					j = 0;
					while ( (matcher = elementMatchers[j++]) ) {
						if ( matcher( elem, context, xml ) ) {
							results.push( elem );
							break;
						}
					}
					if ( outermost ) {
						dirruns = dirrunsUnique;
					}
				}

				// Track unmatched elements for set filters
				if ( bySet ) {
					// They will have gone through all possible matchers
					if ( (elem = !matcher && elem) ) {
						matchedCount--;
					}

					// Lengthen the array for every element, matched or not
					if ( seed ) {
						unmatched.push( elem );
					}
				}
			}

			// Apply set filters to unmatched elements
			matchedCount += i;
			if ( bySet && i !== matchedCount ) {
				j = 0;
				while ( (matcher = setMatchers[j++]) ) {
					matcher( unmatched, setMatched, context, xml );
				}

				if ( seed ) {
					// Reintegrate element matches to eliminate the need for sorting
					if ( matchedCount > 0 ) {
						while ( i-- ) {
							if ( !(unmatched[i] || setMatched[i]) ) {
								setMatched[i] = pop.call( results );
							}
						}
					}

					// Discard index placeholder values to get only actual matches
					setMatched = condense( setMatched );
				}

				// Add matches to results
				push.apply( results, setMatched );

				// Seedless set matches succeeding multiple successful matchers stipulate sorting
				if ( outermost && !seed && setMatched.length > 0 &&
					( matchedCount + setMatchers.length ) > 1 ) {

					Sizzle.uniqueSort( results );
				}
			}

			// Override manipulation of globals by nested matchers
			if ( outermost ) {
				dirruns = dirrunsUnique;
				outermostContext = contextBackup;
			}

			return unmatched;
		};

	return bySet ?
		markFunction( superMatcher ) :
		superMatcher;
}

compile = Sizzle.compile = function( selector, group /* Internal Use Only */ ) {
	var i,
		setMatchers = [],
		elementMatchers = [],
		cached = compilerCache[ selector + " " ];

	if ( !cached ) {
		// Generate a function of recursive functions that can be used to check each element
		if ( !group ) {
			group = tokenize( selector );
		}
		i = group.length;
		while ( i-- ) {
			cached = matcherFromTokens( group[i] );
			if ( cached[ expando ] ) {
				setMatchers.push( cached );
			} else {
				elementMatchers.push( cached );
			}
		}

		// Cache the compiled function
		cached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );
	}
	return cached;
};

function multipleContexts( selector, contexts, results ) {
	var i = 0,
		len = contexts.length;
	for ( ; i < len; i++ ) {
		Sizzle( selector, contexts[i], results );
	}
	return results;
}

function select( selector, context, results, seed ) {
	var i, tokens, token, type, find,
		match = tokenize( selector );

	if ( !seed ) {
		// Try to minimize operations if there is only one group
		if ( match.length === 1 ) {

			// Take a shortcut and set the context if the root selector is an ID
			tokens = match[0] = match[0].slice( 0 );
			if ( tokens.length > 2 && (token = tokens[0]).type === "ID" &&
					support.getById && context.nodeType === 9 && documentIsHTML &&
					Expr.relative[ tokens[1].type ] ) {

				context = ( Expr.find["ID"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];
				if ( !context ) {
					return results;
				}
				selector = selector.slice( tokens.shift().value.length );
			}

			// Fetch a seed set for right-to-left matching
			i = matchExpr["needsContext"].test( selector ) ? 0 : tokens.length;
			while ( i-- ) {
				token = tokens[i];

				// Abort if we hit a combinator
				if ( Expr.relative[ (type = token.type) ] ) {
					break;
				}
				if ( (find = Expr.find[ type ]) ) {
					// Search, expanding context for leading sibling combinators
					if ( (seed = find(
						token.matches[0].replace( runescape, funescape ),
						rsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context
					)) ) {

						// If seed is empty or no tokens remain, we can return early
						tokens.splice( i, 1 );
						selector = seed.length && toSelector( tokens );
						if ( !selector ) {
							push.apply( results, seed );
							return results;
						}

						break;
					}
				}
			}
		}
	}

	// Compile and execute a filtering function
	// Provide `match` to avoid retokenization if we modified the selector above
	compile( selector, match )(
		seed,
		context,
		!documentIsHTML,
		results,
		rsibling.test( selector ) && testContext( context.parentNode ) || context
	);
	return results;
}

// One-time assignments

// Sort stability
support.sortStable = expando.split("").sort( sortOrder ).join("") === expando;

// Support: Chrome<14
// Always assume duplicates if they aren't passed to the comparison function
support.detectDuplicates = !!hasDuplicate;

// Initialize against the default document
setDocument();

// Support: Webkit<537.32 - Safari 6.0.3/Chrome 25 (fixed in Chrome 27)
// Detached nodes confoundingly follow *each other*
support.sortDetached = assert(function( div1 ) {
	// Should return 1, but returns 4 (following)
	return div1.compareDocumentPosition( document.createElement("div") ) & 1;
});

// Support: IE<8
// Prevent attribute/property "interpolation"
// http://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx
if ( !assert(function( div ) {
	div.innerHTML = "<a href='#'></a>";
	return div.firstChild.getAttribute("href") === "#" ;
}) ) {
	addHandle( "type|href|height|width", function( elem, name, isXML ) {
		if ( !isXML ) {
			return elem.getAttribute( name, name.toLowerCase() === "type" ? 1 : 2 );
		}
	});
}

// Support: IE<9
// Use defaultValue in place of getAttribute("value")
if ( !support.attributes || !assert(function( div ) {
	div.innerHTML = "<input/>";
	div.firstChild.setAttribute( "value", "" );
	return div.firstChild.getAttribute( "value" ) === "";
}) ) {
	addHandle( "value", function( elem, name, isXML ) {
		if ( !isXML && elem.nodeName.toLowerCase() === "input" ) {
			return elem.defaultValue;
		}
	});
}

// Support: IE<9
// Use getAttributeNode to fetch booleans when getAttribute lies
if ( !assert(function( div ) {
	return div.getAttribute("disabled") == null;
}) ) {
	addHandle( booleans, function( elem, name, isXML ) {
		var val;
		if ( !isXML ) {
			return elem[ name ] === true ? name.toLowerCase() :
					(val = elem.getAttributeNode( name )) && val.specified ?
					val.value :
				null;
		}
	});
}

return Sizzle;

})( window );


jQuery.find = Sizzle;
jQuery.expr = Sizzle.selectors;
jQuery.expr[":"] = jQuery.expr.pseudos;
jQuery.unique = Sizzle.uniqueSort;
jQuery.text = Sizzle.getText;
jQuery.isXMLDoc = Sizzle.isXML;
jQuery.contains = Sizzle.contains;


var rneedsContext = jQuery.expr.match.needsContext;

var rsingleTag = (/^<(\w+)\s*\/?>(?:<\/\1>|)$/);


var risSimple = /^.[^:#\[\.,]*$/;

// Implement the identical functionality for filter and not
function winnow( elements, qualifier, not ) {
	if ( jQuery.isFunction( qualifier ) ) {
		return jQuery.grep( elements, function( elem, i ) {
			/* jshint -W018 */
			return !!qualifier.call( elem, i, elem ) !== not;
		});

	}

	if ( qualifier.nodeType ) {
		return jQuery.grep( elements, function( elem ) {
			return ( elem === qualifier ) !== not;
		});

	}

	if ( typeof qualifier === "string" ) {
		if ( risSimple.test( qualifier ) ) {
			return jQuery.filter( qualifier, elements, not );
		}

		qualifier = jQuery.filter( qualifier, elements );
	}

	return jQuery.grep( elements, function( elem ) {
		return ( jQuery.inArray( elem, qualifier ) >= 0 ) !== not;
	});
}

jQuery.filter = function( expr, elems, not ) {
	var elem = elems[ 0 ];

	if ( not ) {
		expr = ":not(" + expr + ")";
	}

	return elems.length === 1 && elem.nodeType === 1 ?
		jQuery.find.matchesSelector( elem, expr ) ? [ elem ] : [] :
		jQuery.find.matches( expr, jQuery.grep( elems, function( elem ) {
			return elem.nodeType === 1;
		}));
};

jQuery.fn.extend({
	find: function( selector ) {
		var i,
			ret = [],
			self = this,
			len = self.length;

		if ( typeof selector !== "string" ) {
			return this.pushStack( jQuery( selector ).filter(function() {
				for ( i = 0; i < len; i++ ) {
					if ( jQuery.contains( self[ i ], this ) ) {
						return true;
					}
				}
			}) );
		}

		for ( i = 0; i < len; i++ ) {
			jQuery.find( selector, self[ i ], ret );
		}

		// Needed because $( selector, context ) becomes $( context ).find( selector )
		ret = this.pushStack( len > 1 ? jQuery.unique( ret ) : ret );
		ret.selector = this.selector ? this.selector + " " + selector : selector;
		return ret;
	},
	filter: function( selector ) {
		return this.pushStack( winnow(this, selector || [], false) );
	},
	not: function( selector ) {
		return this.pushStack( winnow(this, selector || [], true) );
	},
	is: function( selector ) {
		return !!winnow(
			this,

			// If this is a positional/relative selector, check membership in the returned set
			// so $("p:first").is("p:last") won't return true for a doc with two "p".
			typeof selector === "string" && rneedsContext.test( selector ) ?
				jQuery( selector ) :
				selector || [],
			false
		).length;
	}
});


// Initialize a jQuery object


// A central reference to the root jQuery(document)
var rootjQuery,

	// Use the correct document accordingly with window argument (sandbox)
	document = window.document,

	// A simple way to check for HTML strings
	// Prioritize #id over <tag> to avoid XSS via location.hash (#9521)
	// Strict HTML recognition (#11290: must start with <)
	rquickExpr = /^(?:\s*(<[\w\W]+>)[^>]*|#([\w-]*))$/,

	init = jQuery.fn.init = function( selector, context ) {
		var match, elem;

		// HANDLE: $(""), $(null), $(undefined), $(false)
		if ( !selector ) {
			return this;
		}

		// Handle HTML strings
		if ( typeof selector === "string" ) {
			if ( selector.charAt(0) === "<" && selector.charAt( selector.length - 1 ) === ">" && selector.length >= 3 ) {
				// Assume that strings that start and end with <> are HTML and skip the regex check
				match = [ null, selector, null ];

			} else {
				match = rquickExpr.exec( selector );
			}

			// Match html or make sure no context is specified for #id
			if ( match && (match[1] || !context) ) {

				// HANDLE: $(html) -> $(array)
				if ( match[1] ) {
					context = context instanceof jQuery ? context[0] : context;

					// scripts is true for back-compat
					// Intentionally let the error be thrown if parseHTML is not present
					jQuery.merge( this, jQuery.parseHTML(
						match[1],
						context && context.nodeType ? context.ownerDocument || context : document,
						true
					) );

					// HANDLE: $(html, props)
					if ( rsingleTag.test( match[1] ) && jQuery.isPlainObject( context ) ) {
						for ( match in context ) {
							// Properties of context are called as methods if possible
							if ( jQuery.isFunction( this[ match ] ) ) {
								this[ match ]( context[ match ] );

							// ...and otherwise set as attributes
							} else {
								this.attr( match, context[ match ] );
							}
						}
					}

					return this;

				// HANDLE: $(#id)
				} else {
					elem = document.getElementById( match[2] );

					// Check parentNode to catch when Blackberry 4.6 returns
					// nodes that are no longer in the document #6963
					if ( elem && elem.parentNode ) {
						// Handle the case where IE and Opera return items
						// by name instead of ID
						if ( elem.id !== match[2] ) {
							return rootjQuery.find( selector );
						}

						// Otherwise, we inject the element directly into the jQuery object
						this.length = 1;
						this[0] = elem;
					}

					this.context = document;
					this.selector = selector;
					return this;
				}

			// HANDLE: $(expr, $(...))
			} else if ( !context || context.jquery ) {
				return ( context || rootjQuery ).find( selector );

			// HANDLE: $(expr, context)
			// (which is just equivalent to: $(context).find(expr)
			} else {
				return this.constructor( context ).find( selector );
			}

		// HANDLE: $(DOMElement)
		} else if ( selector.nodeType ) {
			this.context = this[0] = selector;
			this.length = 1;
			return this;

		// HANDLE: $(function)
		// Shortcut for document ready
		} else if ( jQuery.isFunction( selector ) ) {
			return typeof rootjQuery.ready !== "undefined" ?
				rootjQuery.ready( selector ) :
				// Execute immediately if ready is not present
				selector( jQuery );
		}

		if ( selector.selector !== undefined ) {
			this.selector = selector.selector;
			this.context = selector.context;
		}

		return jQuery.makeArray( selector, this );
	};

// Give the init function the jQuery prototype for later instantiation
init.prototype = jQuery.fn;

// Initialize central reference
rootjQuery = jQuery( document );


var rparentsprev = /^(?:parents|prev(?:Until|All))/,
	// methods guaranteed to produce a unique set when starting from a unique set
	guaranteedUnique = {
		children: true,
		contents: true,
		next: true,
		prev: true
	};

jQuery.extend({
	dir: function( elem, dir, until ) {
		var matched = [],
			cur = elem[ dir ];

		while ( cur && cur.nodeType !== 9 && (until === undefined || cur.nodeType !== 1 || !jQuery( cur ).is( until )) ) {
			if ( cur.nodeType === 1 ) {
				matched.push( cur );
			}
			cur = cur[dir];
		}
		return matched;
	},

	sibling: function( n, elem ) {
		var r = [];

		for ( ; n; n = n.nextSibling ) {
			if ( n.nodeType === 1 && n !== elem ) {
				r.push( n );
			}
		}

		return r;
	}
});

jQuery.fn.extend({
	has: function( target ) {
		var i,
			targets = jQuery( target, this ),
			len = targets.length;

		return this.filter(function() {
			for ( i = 0; i < len; i++ ) {
				if ( jQuery.contains( this, targets[i] ) ) {
					return true;
				}
			}
		});
	},

	closest: function( selectors, context ) {
		var cur,
			i = 0,
			l = this.length,
			matched = [],
			pos = rneedsContext.test( selectors ) || typeof selectors !== "string" ?
				jQuery( selectors, context || this.context ) :
				0;

		for ( ; i < l; i++ ) {
			for ( cur = this[i]; cur && cur !== context; cur = cur.parentNode ) {
				// Always skip document fragments
				if ( cur.nodeType < 11 && (pos ?
					pos.index(cur) > -1 :

					// Don't pass non-elements to Sizzle
					cur.nodeType === 1 &&
						jQuery.find.matchesSelector(cur, selectors)) ) {

					matched.push( cur );
					break;
				}
			}
		}

		return this.pushStack( matched.length > 1 ? jQuery.unique( matched ) : matched );
	},

	// Determine the position of an element within
	// the matched set of elements
	index: function( elem ) {

		// No argument, return index in parent
		if ( !elem ) {
			return ( this[0] && this[0].parentNode ) ? this.first().prevAll().length : -1;
		}

		// index in selector
		if ( typeof elem === "string" ) {
			return jQuery.inArray( this[0], jQuery( elem ) );
		}

		// Locate the position of the desired element
		return jQuery.inArray(
			// If it receives a jQuery object, the first element is used
			elem.jquery ? elem[0] : elem, this );
	},

	add: function( selector, context ) {
		return this.pushStack(
			jQuery.unique(
				jQuery.merge( this.get(), jQuery( selector, context ) )
			)
		);
	},

	addBack: function( selector ) {
		return this.add( selector == null ?
			this.prevObject : this.prevObject.filter(selector)
		);
	}
});

function sibling( cur, dir ) {
	do {
		cur = cur[ dir ];
	} while ( cur && cur.nodeType !== 1 );

	return cur;
}

jQuery.each({
	parent: function( elem ) {
		var parent = elem.parentNode;
		return parent && parent.nodeType !== 11 ? parent : null;
	},
	parents: function( elem ) {
		return jQuery.dir( elem, "parentNode" );
	},
	parentsUntil: function( elem, i, until ) {
		return jQuery.dir( elem, "parentNode", until );
	},
	next: function( elem ) {
		return sibling( elem, "nextSibling" );
	},
	prev: function( elem ) {
		return sibling( elem, "previousSibling" );
	},
	nextAll: function( elem ) {
		return jQuery.dir( elem, "nextSibling" );
	},
	prevAll: function( elem ) {
		return jQuery.dir( elem, "previousSibling" );
	},
	nextUntil: function( elem, i, until ) {
		return jQuery.dir( elem, "nextSibling", until );
	},
	prevUntil: function( elem, i, until ) {
		return jQuery.dir( elem, "previousSibling", until );
	},
	siblings: function( elem ) {
		return jQuery.sibling( ( elem.parentNode || {} ).firstChild, elem );
	},
	children: function( elem ) {
		return jQuery.sibling( elem.firstChild );
	},
	contents: function( elem ) {
		return jQuery.nodeName( elem, "iframe" ) ?
			elem.contentDocument || elem.contentWindow.document :
			jQuery.merge( [], elem.childNodes );
	}
}, function( name, fn ) {
	jQuery.fn[ name ] = function( until, selector ) {
		var ret = jQuery.map( this, fn, until );

		if ( name.slice( -5 ) !== "Until" ) {
			selector = until;
		}

		if ( selector && typeof selector === "string" ) {
			ret = jQuery.filter( selector, ret );
		}

		if ( this.length > 1 ) {
			// Remove duplicates
			if ( !guaranteedUnique[ name ] ) {
				ret = jQuery.unique( ret );
			}

			// Reverse order for parents* and prev-derivatives
			if ( rparentsprev.test( name ) ) {
				ret = ret.reverse();
			}
		}

		return this.pushStack( ret );
	};
});
var rnotwhite = (/\S+/g);


// String to Object options format cache
var optionsCache = {};

// Convert String-formatted options into Object-formatted ones and store in cache
function createOptions( options ) {
	var object = optionsCache[ options ] = {};
	jQuery.each( options.match( rnotwhite ) || [], function( _, flag ) {
		object[ flag ] = true;
	});
	return object;
}

/*
 * Create a callback list using the following parameters:
 *
 *	options: an optional list of space-separated options that will change how
 *			the callback list behaves or a more traditional option object
 *
 * By default a callback list will act like an event callback list and can be
 * "fired" multiple times.
 *
 * Possible options:
 *
 *	once:			will ensure the callback list can only be fired once (like a Deferred)
 *
 *	memory:			will keep track of previous values and will call any callback added
 *					after the list has been fired right away with the latest "memorized"
 *					values (like a Deferred)
 *
 *	unique:			will ensure a callback can only be added once (no duplicate in the list)
 *
 *	stopOnFalse:	interrupt callings when a callback returns false
 *
 */
jQuery.Callbacks = function( options ) {

	// Convert options from String-formatted to Object-formatted if needed
	// (we check in cache first)
	options = typeof options === "string" ?
		( optionsCache[ options ] || createOptions( options ) ) :
		jQuery.extend( {}, options );

	var // Flag to know if list is currently firing
		firing,
		// Last fire value (for non-forgettable lists)
		memory,
		// Flag to know if list was already fired
		fired,
		// End of the loop when firing
		firingLength,
		// Index of currently firing callback (modified by remove if needed)
		firingIndex,
		// First callback to fire (used internally by add and fireWith)
		firingStart,
		// Actual callback list
		list = [],
		// Stack of fire calls for repeatable lists
		stack = !options.once && [],
		// Fire callbacks
		fire = function( data ) {
			memory = options.memory && data;
			fired = true;
			firingIndex = firingStart || 0;
			firingStart = 0;
			firingLength = list.length;
			firing = true;
			for ( ; list && firingIndex < firingLength; firingIndex++ ) {
				if ( list[ firingIndex ].apply( data[ 0 ], data[ 1 ] ) === false && options.stopOnFalse ) {
					memory = false; // To prevent further calls using add
					break;
				}
			}
			firing = false;
			if ( list ) {
				if ( stack ) {
					if ( stack.length ) {
						fire( stack.shift() );
					}
				} else if ( memory ) {
					list = [];
				} else {
					self.disable();
				}
			}
		},
		// Actual Callbacks object
		self = {
			// Add a callback or a collection of callbacks to the list
			add: function() {
				if ( list ) {
					// First, we save the current length
					var start = list.length;
					(function add( args ) {
						jQuery.each( args, function( _, arg ) {
							var type = jQuery.type( arg );
							if ( type === "function" ) {
								if ( !options.unique || !self.has( arg ) ) {
									list.push( arg );
								}
							} else if ( arg && arg.length && type !== "string" ) {
								// Inspect recursively
								add( arg );
							}
						});
					})( arguments );
					// Do we need to add the callbacks to the
					// current firing batch?
					if ( firing ) {
						firingLength = list.length;
					// With memory, if we're not firing then
					// we should call right away
					} else if ( memory ) {
						firingStart = start;
						fire( memory );
					}
				}
				return this;
			},
			// Remove a callback from the list
			remove: function() {
				if ( list ) {
					jQuery.each( arguments, function( _, arg ) {
						var index;
						while ( ( index = jQuery.inArray( arg, list, index ) ) > -1 ) {
							list.splice( index, 1 );
							// Handle firing indexes
							if ( firing ) {
								if ( index <= firingLength ) {
									firingLength--;
								}
								if ( index <= firingIndex ) {
									firingIndex--;
								}
							}
						}
					});
				}
				return this;
			},
			// Check if a given callback is in the list.
			// If no argument is given, return whether or not list has callbacks attached.
			has: function( fn ) {
				return fn ? jQuery.inArray( fn, list ) > -1 : !!( list && list.length );
			},
			// Remove all callbacks from the list
			empty: function() {
				list = [];
				firingLength = 0;
				return this;
			},
			// Have the list do nothing anymore
			disable: function() {
				list = stack = memory = undefined;
				return this;
			},
			// Is it disabled?
			disabled: function() {
				return !list;
			},
			// Lock the list in its current state
			lock: function() {
				stack = undefined;
				if ( !memory ) {
					self.disable();
				}
				return this;
			},
			// Is it locked?
			locked: function() {
				return !stack;
			},
			// Call all callbacks with the given context and arguments
			fireWith: function( context, args ) {
				if ( list && ( !fired || stack ) ) {
					args = args || [];
					args = [ context, args.slice ? args.slice() : args ];
					if ( firing ) {
						stack.push( args );
					} else {
						fire( args );
					}
				}
				return this;
			},
			// Call all the callbacks with the given arguments
			fire: function() {
				self.fireWith( this, arguments );
				return this;
			},
			// To know if the callbacks have already been called at least once
			fired: function() {
				return !!fired;
			}
		};

	return self;
};


jQuery.extend({

	Deferred: function( func ) {
		var tuples = [
				// action, add listener, listener list, final state
				[ "resolve", "done", jQuery.Callbacks("once memory"), "resolved" ],
				[ "reject", "fail", jQuery.Callbacks("once memory"), "rejected" ],
				[ "notify", "progress", jQuery.Callbacks("memory") ]
			],
			state = "pending",
			promise = {
				state: function() {
					return state;
				},
				always: function() {
					deferred.done( arguments ).fail( arguments );
					return this;
				},
				then: function( /* fnDone, fnFail, fnProgress */ ) {
					var fns = arguments;
					return jQuery.Deferred(function( newDefer ) {
						jQuery.each( tuples, function( i, tuple ) {
							var fn = jQuery.isFunction( fns[ i ] ) && fns[ i ];
							// deferred[ done | fail | progress ] for forwarding actions to newDefer
							deferred[ tuple[1] ](function() {
								var returned = fn && fn.apply( this, arguments );
								if ( returned && jQuery.isFunction( returned.promise ) ) {
									returned.promise()
										.done( newDefer.resolve )
										.fail( newDefer.reject )
										.progress( newDefer.notify );
								} else {
									newDefer[ tuple[ 0 ] + "With" ]( this === promise ? newDefer.promise() : this, fn ? [ returned ] : arguments );
								}
							});
						});
						fns = null;
					}).promise();
				},
				// Get a promise for this deferred
				// If obj is provided, the promise aspect is added to the object
				promise: function( obj ) {
					return obj != null ? jQuery.extend( obj, promise ) : promise;
				}
			},
			deferred = {};

		// Keep pipe for back-compat
		promise.pipe = promise.then;

		// Add list-specific methods
		jQuery.each( tuples, function( i, tuple ) {
			var list = tuple[ 2 ],
				stateString = tuple[ 3 ];

			// promise[ done | fail | progress ] = list.add
			promise[ tuple[1] ] = list.add;

			// Handle state
			if ( stateString ) {
				list.add(function() {
					// state = [ resolved | rejected ]
					state = stateString;

				// [ reject_list | resolve_list ].disable; progress_list.lock
				}, tuples[ i ^ 1 ][ 2 ].disable, tuples[ 2 ][ 2 ].lock );
			}

			// deferred[ resolve | reject | notify ]
			deferred[ tuple[0] ] = function() {
				deferred[ tuple[0] + "With" ]( this === deferred ? promise : this, arguments );
				return this;
			};
			deferred[ tuple[0] + "With" ] = list.fireWith;
		});

		// Make the deferred a promise
		promise.promise( deferred );

		// Call given func if any
		if ( func ) {
			func.call( deferred, deferred );
		}

		// All done!
		return deferred;
	},

	// Deferred helper
	when: function( subordinate /* , ..., subordinateN */ ) {
		var i = 0,
			resolveValues = slice.call( arguments ),
			length = resolveValues.length,

			// the count of uncompleted subordinates
			remaining = length !== 1 || ( subordinate && jQuery.isFunction( subordinate.promise ) ) ? length : 0,

			// the master Deferred. If resolveValues consist of only a single Deferred, just use that.
			deferred = remaining === 1 ? subordinate : jQuery.Deferred(),

			// Update function for both resolve and progress values
			updateFunc = function( i, contexts, values ) {
				return function( value ) {
					contexts[ i ] = this;
					values[ i ] = arguments.length > 1 ? slice.call( arguments ) : value;
					if ( values === progressValues ) {
						deferred.notifyWith( contexts, values );

					} else if ( !(--remaining) ) {
						deferred.resolveWith( contexts, values );
					}
				};
			},

			progressValues, progressContexts, resolveContexts;

		// add listeners to Deferred subordinates; treat others as resolved
		if ( length > 1 ) {
			progressValues = new Array( length );
			progressContexts = new Array( length );
			resolveContexts = new Array( length );
			for ( ; i < length; i++ ) {
				if ( resolveValues[ i ] && jQuery.isFunction( resolveValues[ i ].promise ) ) {
					resolveValues[ i ].promise()
						.done( updateFunc( i, resolveContexts, resolveValues ) )
						.fail( deferred.reject )
						.progress( updateFunc( i, progressContexts, progressValues ) );
				} else {
					--remaining;
				}
			}
		}

		// if we're not waiting on anything, resolve the master
		if ( !remaining ) {
			deferred.resolveWith( resolveContexts, resolveValues );
		}

		return deferred.promise();
	}
});


// The deferred used on DOM ready
var readyList;

jQuery.fn.ready = function( fn ) {
	// Add the callback
	jQuery.ready.promise().done( fn );

	return this;
};

jQuery.extend({
	// Is the DOM ready to be used? Set to true once it occurs.
	isReady: false,

	// A counter to track how many items to wait for before
	// the ready event fires. See #6781
	readyWait: 1,

	// Hold (or release) the ready event
	holdReady: function( hold ) {
		if ( hold ) {
			jQuery.readyWait++;
		} else {
			jQuery.ready( true );
		}
	},

	// Handle when the DOM is ready
	ready: function( wait ) {

		// Abort if there are pending holds or we're already ready
		if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
			return;
		}

		// Make sure body exists, at least, in case IE gets a little overzealous (ticket #5443).
		if ( !document.body ) {
			return setTimeout( jQuery.ready );
		}

		// Remember that the DOM is ready
		jQuery.isReady = true;

		// If a normal DOM Ready event fired, decrement, and wait if need be
		if ( wait !== true && --jQuery.readyWait > 0 ) {
			return;
		}

		// If there are functions bound, to execute
		readyList.resolveWith( document, [ jQuery ] );

		// Trigger any bound ready events
		if ( jQuery.fn.trigger ) {
			jQuery( document ).trigger("ready").off("ready");
		}
	}
});

/**
 * Clean-up method for dom ready events
 */
function detach() {
	if ( document.addEventListener ) {
		document.removeEventListener( "DOMContentLoaded", completed, false );
		window.removeEventListener( "load", completed, false );

	} else {
		document.detachEvent( "onreadystatechange", completed );
		window.detachEvent( "onload", completed );
	}
}

/**
 * The ready event handler and self cleanup method
 */
function completed() {
	// readyState === "complete" is good enough for us to call the dom ready in oldIE
	if ( document.addEventListener || event.type === "load" || document.readyState === "complete" ) {
		detach();
		jQuery.ready();
	}
}

jQuery.ready.promise = function( obj ) {
	if ( !readyList ) {

		readyList = jQuery.Deferred();

		// Catch cases where $(document).ready() is called after the browser event has already occurred.
		// we once tried to use readyState "interactive" here, but it caused issues like the one
		// discovered by ChrisS here: http://bugs.jquery.com/ticket/12282#comment:15
		if ( document.readyState === "complete" ) {
			// Handle it asynchronously to allow scripts the opportunity to delay ready
			setTimeout( jQuery.ready );

		// Standards-based browsers support DOMContentLoaded
		} else if ( document.addEventListener ) {
			// Use the handy event callback
			document.addEventListener( "DOMContentLoaded", completed, false );

			// A fallback to window.onload, that will always work
			window.addEventListener( "load", completed, false );

		// If IE event model is used
		} else {
			// Ensure firing before onload, maybe late but safe also for iframes
			document.attachEvent( "onreadystatechange", completed );

			// A fallback to window.onload, that will always work
			window.attachEvent( "onload", completed );

			// If IE and not a frame
			// continually check to see if the document is ready
			var top = false;

			try {
				top = window.frameElement == null && document.documentElement;
			} catch(e) {}

			if ( top && top.doScroll ) {
				(function doScrollCheck() {
					if ( !jQuery.isReady ) {

						try {
							// Use the trick by Diego Perini
							// http://javascript.nwbox.com/IEContentLoaded/
							top.doScroll("left");
						} catch(e) {
							return setTimeout( doScrollCheck, 50 );
						}

						// detach all dom ready events
						detach();

						// and execute any waiting functions
						jQuery.ready();
					}
				})();
			}
		}
	}
	return readyList.promise( obj );
};


var strundefined = typeof undefined;


// Support: IE<9
// Iteration over object's inherited properties before its own
var i;
for ( i in jQuery( support ) ) {
	break;
}
support.ownLast = i !== "0";

// Note: most support tests are defined in their respective modules.
// false until the test is run
support.inlineBlockNeedsLayout = false;

jQuery(function() {
	// We need to execute this one support test ASAP because we need to know
	// if body.style.zoom needs to be set.

	var container, div,
		body = document.getElementsByTagName("body")[0];

	if ( !body ) {
		// Return for frameset docs that don't have a body
		return;
	}

	// Setup
	container = document.createElement( "div" );
	container.style.cssText = "border:0;width:0;height:0;position:absolute;top:0;left:-9999px;margin-top:1px";

	div = document.createElement( "div" );
	body.appendChild( container ).appendChild( div );

	if ( typeof div.style.zoom !== strundefined ) {
		// Support: IE<8
		// Check if natively block-level elements act like inline-block
		// elements when setting their display to 'inline' and giving
		// them layout
		div.style.cssText = "border:0;margin:0;width:1px;padding:1px;display:inline;zoom:1";

		if ( (support.inlineBlockNeedsLayout = ( div.offsetWidth === 3 )) ) {
			// Prevent IE 6 from affecting layout for positioned elements #11048
			// Prevent IE from shrinking the body in IE 7 mode #12869
			// Support: IE<8
			body.style.zoom = 1;
		}
	}

	body.removeChild( container );

	// Null elements to avoid leaks in IE
	container = div = null;
});


(function() {
	var div = document.createElement( "div" );

	// Execute the test only if not already executed in another module.
	if (support.deleteExpando == null) {
		// Support: IE<9
		support.deleteExpando = true;
		try {
			delete div.test;
		} catch( e ) {
			support.deleteExpando = false;
		}
	}

	// Null elements to avoid leaks in IE.
	div = null;
})();


/**
 * Determines whether an object can have data
 */
jQuery.acceptData = function( elem ) {
	var noData = jQuery.noData[ (elem.nodeName + " ").toLowerCase() ],
		nodeType = +elem.nodeType || 1;

	// Do not set data on non-element DOM nodes because it will not be cleared (#8335).
	return nodeType !== 1 && nodeType !== 9 ?
		false :

		// Nodes accept data unless otherwise specified; rejection can be conditional
		!noData || noData !== true && elem.getAttribute("classid") === noData;
};


var rbrace = /^(?:\{[\w\W]*\}|\[[\w\W]*\])$/,
	rmultiDash = /([A-Z])/g;

function dataAttr( elem, key, data ) {
	// If nothing was found internally, try to fetch any
	// data from the HTML5 data-* attribute
	if ( data === undefined && elem.nodeType === 1 ) {

		var name = "data-" + key.replace( rmultiDash, "-$1" ).toLowerCase();

		data = elem.getAttribute( name );

		if ( typeof data === "string" ) {
			try {
				data = data === "true" ? true :
					data === "false" ? false :
					data === "null" ? null :
					// Only convert to a number if it doesn't change the string
					+data + "" === data ? +data :
					rbrace.test( data ) ? jQuery.parseJSON( data ) :
					data;
			} catch( e ) {}

			// Make sure we set the data so it isn't changed later
			jQuery.data( elem, key, data );

		} else {
			data = undefined;
		}
	}

	return data;
}

// checks a cache object for emptiness
function isEmptyDataObject( obj ) {
	var name;
	for ( name in obj ) {

		// if the public data object is empty, the private is still empty
		if ( name === "data" && jQuery.isEmptyObject( obj[name] ) ) {
			continue;
		}
		if ( name !== "toJSON" ) {
			return false;
		}
	}

	return true;
}

function internalData( elem, name, data, pvt /* Internal Use Only */ ) {
	if ( !jQuery.acceptData( elem ) ) {
		return;
	}

	var ret, thisCache,
		internalKey = jQuery.expando,

		// We have to handle DOM nodes and JS objects differently because IE6-7
		// can't GC object references properly across the DOM-JS boundary
		isNode = elem.nodeType,

		// Only DOM nodes need the global jQuery cache; JS object data is
		// attached directly to the object so GC can occur automatically
		cache = isNode ? jQuery.cache : elem,

		// Only defining an ID for JS objects if its cache already exists allows
		// the code to shortcut on the same path as a DOM node with no cache
		id = isNode ? elem[ internalKey ] : elem[ internalKey ] && internalKey;

	// Avoid doing any more work than we need to when trying to get data on an
	// object that has no data at all
	if ( (!id || !cache[id] || (!pvt && !cache[id].data)) && data === undefined && typeof name === "string" ) {
		return;
	}

	if ( !id ) {
		// Only DOM nodes need a new unique ID for each element since their data
		// ends up in the global cache
		if ( isNode ) {
			id = elem[ internalKey ] = deletedIds.pop() || jQuery.guid++;
		} else {
			id = internalKey;
		}
	}

	if ( !cache[ id ] ) {
		// Avoid exposing jQuery metadata on plain JS objects when the object
		// is serialized using JSON.stringify
		cache[ id ] = isNode ? {} : { toJSON: jQuery.noop };
	}

	// An object can be passed to jQuery.data instead of a key/value pair; this gets
	// shallow copied over onto the existing cache
	if ( typeof name === "object" || typeof name === "function" ) {
		if ( pvt ) {
			cache[ id ] = jQuery.extend( cache[ id ], name );
		} else {
			cache[ id ].data = jQuery.extend( cache[ id ].data, name );
		}
	}

	thisCache = cache[ id ];

	// jQuery data() is stored in a separate object inside the object's internal data
	// cache in order to avoid key collisions between internal data and user-defined
	// data.
	if ( !pvt ) {
		if ( !thisCache.data ) {
			thisCache.data = {};
		}

		thisCache = thisCache.data;
	}

	if ( data !== undefined ) {
		thisCache[ jQuery.camelCase( name ) ] = data;
	}

	// Check for both converted-to-camel and non-converted data property names
	// If a data property was specified
	if ( typeof name === "string" ) {

		// First Try to find as-is property data
		ret = thisCache[ name ];

		// Test for null|undefined property data
		if ( ret == null ) {

			// Try to find the camelCased property
			ret = thisCache[ jQuery.camelCase( name ) ];
		}
	} else {
		ret = thisCache;
	}

	return ret;
}

function internalRemoveData( elem, name, pvt ) {
	if ( !jQuery.acceptData( elem ) ) {
		return;
	}

	var thisCache, i,
		isNode = elem.nodeType,

		// See jQuery.data for more information
		cache = isNode ? jQuery.cache : elem,
		id = isNode ? elem[ jQuery.expando ] : jQuery.expando;

	// If there is already no cache entry for this object, there is no
	// purpose in continuing
	if ( !cache[ id ] ) {
		return;
	}

	if ( name ) {

		thisCache = pvt ? cache[ id ] : cache[ id ].data;

		if ( thisCache ) {

			// Support array or space separated string names for data keys
			if ( !jQuery.isArray( name ) ) {

				// try the string as a key before any manipulation
				if ( name in thisCache ) {
					name = [ name ];
				} else {

					// split the camel cased version by spaces unless a key with the spaces exists
					name = jQuery.camelCase( name );
					if ( name in thisCache ) {
						name = [ name ];
					} else {
						name = name.split(" ");
					}
				}
			} else {
				// If "name" is an array of keys...
				// When data is initially created, via ("key", "val") signature,
				// keys will be converted to camelCase.
				// Since there is no way to tell _how_ a key was added, remove
				// both plain key and camelCase key. #12786
				// This will only penalize the array argument path.
				name = name.concat( jQuery.map( name, jQuery.camelCase ) );
			}

			i = name.length;
			while ( i-- ) {
				delete thisCache[ name[i] ];
			}

			// If there is no data left in the cache, we want to continue
			// and let the cache object itself get destroyed
			if ( pvt ? !isEmptyDataObject(thisCache) : !jQuery.isEmptyObject(thisCache) ) {
				return;
			}
		}
	}

	// See jQuery.data for more information
	if ( !pvt ) {
		delete cache[ id ].data;

		// Don't destroy the parent cache unless the internal data object
		// had been the only thing left in it
		if ( !isEmptyDataObject( cache[ id ] ) ) {
			return;
		}
	}

	// Destroy the cache
	if ( isNode ) {
		jQuery.cleanData( [ elem ], true );

	// Use delete when supported for expandos or `cache` is not a window per isWindow (#10080)
	/* jshint eqeqeq: false */
	} else if ( support.deleteExpando || cache != cache.window ) {
		/* jshint eqeqeq: true */
		delete cache[ id ];

	// When all else fails, null
	} else {
		cache[ id ] = null;
	}
}

jQuery.extend({
	cache: {},

	// The following elements (space-suffixed to avoid Object.prototype collisions)
	// throw uncatchable exceptions if you attempt to set expando properties
	noData: {
		"applet ": true,
		"embed ": true,
		// ...but Flash objects (which have this classid) *can* handle expandos
		"object ": "clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
	},

	hasData: function( elem ) {
		elem = elem.nodeType ? jQuery.cache[ elem[jQuery.expando] ] : elem[ jQuery.expando ];
		return !!elem && !isEmptyDataObject( elem );
	},

	data: function( elem, name, data ) {
		return internalData( elem, name, data );
	},

	removeData: function( elem, name ) {
		return internalRemoveData( elem, name );
	},

	// For internal use only.
	_data: function( elem, name, data ) {
		return internalData( elem, name, data, true );
	},

	_removeData: function( elem, name ) {
		return internalRemoveData( elem, name, true );
	}
});

jQuery.fn.extend({
	data: function( key, value ) {
		var i, name, data,
			elem = this[0],
			attrs = elem && elem.attributes;

		// Special expections of .data basically thwart jQuery.access,
		// so implement the relevant behavior ourselves

		// Gets all values
		if ( key === undefined ) {
			if ( this.length ) {
				data = jQuery.data( elem );

				if ( elem.nodeType === 1 && !jQuery._data( elem, "parsedAttrs" ) ) {
					i = attrs.length;
					while ( i-- ) {
						name = attrs[i].name;

						if ( name.indexOf("data-") === 0 ) {
							name = jQuery.camelCase( name.slice(5) );

							dataAttr( elem, name, data[ name ] );
						}
					}
					jQuery._data( elem, "parsedAttrs", true );
				}
			}

			return data;
		}

		// Sets multiple values
		if ( typeof key === "object" ) {
			return this.each(function() {
				jQuery.data( this, key );
			});
		}

		return arguments.length > 1 ?

			// Sets one value
			this.each(function() {
				jQuery.data( this, key, value );
			}) :

			// Gets one value
			// Try to fetch any internally stored data first
			elem ? dataAttr( elem, key, jQuery.data( elem, key ) ) : undefined;
	},

	removeData: function( key ) {
		return this.each(function() {
			jQuery.removeData( this, key );
		});
	}
});


jQuery.extend({
	queue: function( elem, type, data ) {
		var queue;

		if ( elem ) {
			type = ( type || "fx" ) + "queue";
			queue = jQuery._data( elem, type );

			// Speed up dequeue by getting out quickly if this is just a lookup
			if ( data ) {
				if ( !queue || jQuery.isArray(data) ) {
					queue = jQuery._data( elem, type, jQuery.makeArray(data) );
				} else {
					queue.push( data );
				}
			}
			return queue || [];
		}
	},

	dequeue: function( elem, type ) {
		type = type || "fx";

		var queue = jQuery.queue( elem, type ),
			startLength = queue.length,
			fn = queue.shift(),
			hooks = jQuery._queueHooks( elem, type ),
			next = function() {
				jQuery.dequeue( elem, type );
			};

		// If the fx queue is dequeued, always remove the progress sentinel
		if ( fn === "inprogress" ) {
			fn = queue.shift();
			startLength--;
		}

		if ( fn ) {

			// Add a progress sentinel to prevent the fx queue from being
			// automatically dequeued
			if ( type === "fx" ) {
				queue.unshift( "inprogress" );
			}

			// clear up the last queue stop function
			delete hooks.stop;
			fn.call( elem, next, hooks );
		}

		if ( !startLength && hooks ) {
			hooks.empty.fire();
		}
	},

	// not intended for public consumption - generates a queueHooks object, or returns the current one
	_queueHooks: function( elem, type ) {
		var key = type + "queueHooks";
		return jQuery._data( elem, key ) || jQuery._data( elem, key, {
			empty: jQuery.Callbacks("once memory").add(function() {
				jQuery._removeData( elem, type + "queue" );
				jQuery._removeData( elem, key );
			})
		});
	}
});

jQuery.fn.extend({
	queue: function( type, data ) {
		var setter = 2;

		if ( typeof type !== "string" ) {
			data = type;
			type = "fx";
			setter--;
		}

		if ( arguments.length < setter ) {
			return jQuery.queue( this[0], type );
		}

		return data === undefined ?
			this :
			this.each(function() {
				var queue = jQuery.queue( this, type, data );

				// ensure a hooks for this queue
				jQuery._queueHooks( this, type );

				if ( type === "fx" && queue[0] !== "inprogress" ) {
					jQuery.dequeue( this, type );
				}
			});
	},
	dequeue: function( type ) {
		return this.each(function() {
			jQuery.dequeue( this, type );
		});
	},
	clearQueue: function( type ) {
		return this.queue( type || "fx", [] );
	},
	// Get a promise resolved when queues of a certain type
	// are emptied (fx is the type by default)
	promise: function( type, obj ) {
		var tmp,
			count = 1,
			defer = jQuery.Deferred(),
			elements = this,
			i = this.length,
			resolve = function() {
				if ( !( --count ) ) {
					defer.resolveWith( elements, [ elements ] );
				}
			};

		if ( typeof type !== "string" ) {
			obj = type;
			type = undefined;
		}
		type = type || "fx";

		while ( i-- ) {
			tmp = jQuery._data( elements[ i ], type + "queueHooks" );
			if ( tmp && tmp.empty ) {
				count++;
				tmp.empty.add( resolve );
			}
		}
		resolve();
		return defer.promise( obj );
	}
});
var pnum = (/[+-]?(?:\d*\.|)\d+(?:[eE][+-]?\d+|)/).source;

var cssExpand = [ "Top", "Right", "Bottom", "Left" ];

var isHidden = function( elem, el ) {
		// isHidden might be called from jQuery#filter function;
		// in that case, element will be second argument
		elem = el || elem;
		return jQuery.css( elem, "display" ) === "none" || !jQuery.contains( elem.ownerDocument, elem );
	};


// Multifunctional method to get and set values of a collection
// The value/s can optionally be executed if it's a function
var access = jQuery.access = function( elems, fn, key, value, chainable, emptyGet, raw ) {
	var i = 0,
		length = elems.length,
		bulk = key == null;

	// Sets many values
	if ( jQuery.type( key ) === "object" ) {
		chainable = true;
		for ( i in key ) {
			jQuery.access( elems, fn, i, key[i], true, emptyGet, raw );
		}

	// Sets one value
	} else if ( value !== undefined ) {
		chainable = true;

		if ( !jQuery.isFunction( value ) ) {
			raw = true;
		}

		if ( bulk ) {
			// Bulk operations run against the entire set
			if ( raw ) {
				fn.call( elems, value );
				fn = null;

			// ...except when executing function values
			} else {
				bulk = fn;
				fn = function( elem, key, value ) {
					return bulk.call( jQuery( elem ), value );
				};
			}
		}

		if ( fn ) {
			for ( ; i < length; i++ ) {
				fn( elems[i], key, raw ? value : value.call( elems[i], i, fn( elems[i], key ) ) );
			}
		}
	}

	return chainable ?
		elems :

		// Gets
		bulk ?
			fn.call( elems ) :
			length ? fn( elems[0], key ) : emptyGet;
};
var rcheckableType = (/^(?:checkbox|radio)$/i);


(function() {
	var fragment = document.createDocumentFragment(),
		div = document.createElement("div"),
		input = document.createElement("input");

	// Setup
	div.setAttribute( "className", "t" );
	div.innerHTML = "  <link/><table></table><a href='/a'>a</a>";

	// IE strips leading whitespace when .innerHTML is used
	support.leadingWhitespace = div.firstChild.nodeType === 3;

	// Make sure that tbody elements aren't automatically inserted
	// IE will insert them into empty tables
	support.tbody = !div.getElementsByTagName( "tbody" ).length;

	// Make sure that link elements get serialized correctly by innerHTML
	// This requires a wrapper element in IE
	support.htmlSerialize = !!div.getElementsByTagName( "link" ).length;

	// Makes sure cloning an html5 element does not cause problems
	// Where outerHTML is undefined, this still works
	support.html5Clone =
		document.createElement( "nav" ).cloneNode( true ).outerHTML !== "<:nav></:nav>";

	// Check if a disconnected checkbox will retain its checked
	// value of true after appended to the DOM (IE6/7)
	input.type = "checkbox";
	input.checked = true;
	fragment.appendChild( input );
	support.appendChecked = input.checked;

	// Make sure textarea (and checkbox) defaultValue is properly cloned
	// Support: IE6-IE11+
	div.innerHTML = "<textarea>x</textarea>";
	support.noCloneChecked = !!div.cloneNode( true ).lastChild.defaultValue;

	// #11217 - WebKit loses check when the name is after the checked attribute
	fragment.appendChild( div );
	div.innerHTML = "<input type='radio' checked='checked' name='t'/>";

	// Support: Safari 5.1, iOS 5.1, Android 4.x, Android 2.3
	// old WebKit doesn't clone checked state correctly in fragments
	support.checkClone = div.cloneNode( true ).cloneNode( true ).lastChild.checked;

	// Support: IE<9
	// Opera does not clone events (and typeof div.attachEvent === undefined).
	// IE9-10 clones events bound via attachEvent, but they don't trigger with .click()
	support.noCloneEvent = true;
	if ( div.attachEvent ) {
		div.attachEvent( "onclick", function() {
			support.noCloneEvent = false;
		});

		div.cloneNode( true ).click();
	}

	// Execute the test only if not already executed in another module.
	if (support.deleteExpando == null) {
		// Support: IE<9
		support.deleteExpando = true;
		try {
			delete div.test;
		} catch( e ) {
			support.deleteExpando = false;
		}
	}

	// Null elements to avoid leaks in IE.
	fragment = div = input = null;
})();


(function() {
	var i, eventName,
		div = document.createElement( "div" );

	// Support: IE<9 (lack submit/change bubble), Firefox 23+ (lack focusin event)
	for ( i in { submit: true, change: true, focusin: true }) {
		eventName = "on" + i;

		if ( !(support[ i + "Bubbles" ] = eventName in window) ) {
			// Beware of CSP restrictions (https://developer.mozilla.org/en/Security/CSP)
			div.setAttribute( eventName, "t" );
			support[ i + "Bubbles" ] = div.attributes[ eventName ].expando === false;
		}
	}

	// Null elements to avoid leaks in IE.
	div = null;
})();


var rformElems = /^(?:input|select|textarea)$/i,
	rkeyEvent = /^key/,
	rmouseEvent = /^(?:mouse|contextmenu)|click/,
	rfocusMorph = /^(?:focusinfocus|focusoutblur)$/,
	rtypenamespace = /^([^.]*)(?:\.(.+)|)$/;

function returnTrue() {
	return true;
}

function returnFalse() {
	return false;
}

function safeActiveElement() {
	try {
		return document.activeElement;
	} catch ( err ) { }
}

/*
 * Helper functions for managing events -- not part of the public interface.
 * Props to Dean Edwards' addEvent library for many of the ideas.
 */
jQuery.event = {

	global: {},

	add: function( elem, types, handler, data, selector ) {
		var tmp, events, t, handleObjIn,
			special, eventHandle, handleObj,
			handlers, type, namespaces, origType,
			elemData = jQuery._data( elem );

		// Don't attach events to noData or text/comment nodes (but allow plain objects)
		if ( !elemData ) {
			return;
		}

		// Caller can pass in an object of custom data in lieu of the handler
		if ( handler.handler ) {
			handleObjIn = handler;
			handler = handleObjIn.handler;
			selector = handleObjIn.selector;
		}

		// Make sure that the handler has a unique ID, used to find/remove it later
		if ( !handler.guid ) {
			handler.guid = jQuery.guid++;
		}

		// Init the element's event structure and main handler, if this is the first
		if ( !(events = elemData.events) ) {
			events = elemData.events = {};
		}
		if ( !(eventHandle = elemData.handle) ) {
			eventHandle = elemData.handle = function( e ) {
				// Discard the second event of a jQuery.event.trigger() and
				// when an event is called after a page has unloaded
				return typeof jQuery !== strundefined && (!e || jQuery.event.triggered !== e.type) ?
					jQuery.event.dispatch.apply( eventHandle.elem, arguments ) :
					undefined;
			};
			// Add elem as a property of the handle fn to prevent a memory leak with IE non-native events
			eventHandle.elem = elem;
		}

		// Handle multiple events separated by a space
		types = ( types || "" ).match( rnotwhite ) || [ "" ];
		t = types.length;
		while ( t-- ) {
			tmp = rtypenamespace.exec( types[t] ) || [];
			type = origType = tmp[1];
			namespaces = ( tmp[2] || "" ).split( "." ).sort();

			// There *must* be a type, no attaching namespace-only handlers
			if ( !type ) {
				continue;
			}

			// If event changes its type, use the special event handlers for the changed type
			special = jQuery.event.special[ type ] || {};

			// If selector defined, determine special event api type, otherwise given type
			type = ( selector ? special.delegateType : special.bindType ) || type;

			// Update special based on newly reset type
			special = jQuery.event.special[ type ] || {};

			// handleObj is passed to all event handlers
			handleObj = jQuery.extend({
				type: type,
				origType: origType,
				data: data,
				handler: handler,
				guid: handler.guid,
				selector: selector,
				needsContext: selector && jQuery.expr.match.needsContext.test( selector ),
				namespace: namespaces.join(".")
			}, handleObjIn );

			// Init the event handler queue if we're the first
			if ( !(handlers = events[ type ]) ) {
				handlers = events[ type ] = [];
				handlers.delegateCount = 0;

				// Only use addEventListener/attachEvent if the special events handler returns false
				if ( !special.setup || special.setup.call( elem, data, namespaces, eventHandle ) === false ) {
					// Bind the global event handler to the element
					if ( elem.addEventListener ) {
						elem.addEventListener( type, eventHandle, false );

					} else if ( elem.attachEvent ) {
						elem.attachEvent( "on" + type, eventHandle );
					}
				}
			}

			if ( special.add ) {
				special.add.call( elem, handleObj );

				if ( !handleObj.handler.guid ) {
					handleObj.handler.guid = handler.guid;
				}
			}

			// Add to the element's handler list, delegates in front
			if ( selector ) {
				handlers.splice( handlers.delegateCount++, 0, handleObj );
			} else {
				handlers.push( handleObj );
			}

			// Keep track of which events have ever been used, for event optimization
			jQuery.event.global[ type ] = true;
		}

		// Nullify elem to prevent memory leaks in IE
		elem = null;
	},

	// Detach an event or set of events from an element
	remove: function( elem, types, handler, selector, mappedTypes ) {
		var j, handleObj, tmp,
			origCount, t, events,
			special, handlers, type,
			namespaces, origType,
			elemData = jQuery.hasData( elem ) && jQuery._data( elem );

		if ( !elemData || !(events = elemData.events) ) {
			return;
		}

		// Once for each type.namespace in types; type may be omitted
		types = ( types || "" ).match( rnotwhite ) || [ "" ];
		t = types.length;
		while ( t-- ) {
			tmp = rtypenamespace.exec( types[t] ) || [];
			type = origType = tmp[1];
			namespaces = ( tmp[2] || "" ).split( "." ).sort();

			// Unbind all events (on this namespace, if provided) for the element
			if ( !type ) {
				for ( type in events ) {
					jQuery.event.remove( elem, type + types[ t ], handler, selector, true );
				}
				continue;
			}

			special = jQuery.event.special[ type ] || {};
			type = ( selector ? special.delegateType : special.bindType ) || type;
			handlers = events[ type ] || [];
			tmp = tmp[2] && new RegExp( "(^|\\.)" + namespaces.join("\\.(?:.*\\.|)") + "(\\.|$)" );

			// Remove matching events
			origCount = j = handlers.length;
			while ( j-- ) {
				handleObj = handlers[ j ];

				if ( ( mappedTypes || origType === handleObj.origType ) &&
					( !handler || handler.guid === handleObj.guid ) &&
					( !tmp || tmp.test( handleObj.namespace ) ) &&
					( !selector || selector === handleObj.selector || selector === "**" && handleObj.selector ) ) {
					handlers.splice( j, 1 );

					if ( handleObj.selector ) {
						handlers.delegateCount--;
					}
					if ( special.remove ) {
						special.remove.call( elem, handleObj );
					}
				}
			}

			// Remove generic event handler if we removed something and no more handlers exist
			// (avoids potential for endless recursion during removal of special event handlers)
			if ( origCount && !handlers.length ) {
				if ( !special.teardown || special.teardown.call( elem, namespaces, elemData.handle ) === false ) {
					jQuery.removeEvent( elem, type, elemData.handle );
				}

				delete events[ type ];
			}
		}

		// Remove the expando if it's no longer used
		if ( jQuery.isEmptyObject( events ) ) {
			delete elemData.handle;

			// removeData also checks for emptiness and clears the expando if empty
			// so use it instead of delete
			jQuery._removeData( elem, "events" );
		}
	},

	trigger: function( event, data, elem, onlyHandlers ) {
		var handle, ontype, cur,
			bubbleType, special, tmp, i,
			eventPath = [ elem || document ],
			type = hasOwn.call( event, "type" ) ? event.type : event,
			namespaces = hasOwn.call( event, "namespace" ) ? event.namespace.split(".") : [];

		cur = tmp = elem = elem || document;

		// Don't do events on text and comment nodes
		if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
			return;
		}

		// focus/blur morphs to focusin/out; ensure we're not firing them right now
		if ( rfocusMorph.test( type + jQuery.event.triggered ) ) {
			return;
		}

		if ( type.indexOf(".") >= 0 ) {
			// Namespaced trigger; create a regexp to match event type in handle()
			namespaces = type.split(".");
			type = namespaces.shift();
			namespaces.sort();
		}
		ontype = type.indexOf(":") < 0 && "on" + type;

		// Caller can pass in a jQuery.Event object, Object, or just an event type string
		event = event[ jQuery.expando ] ?
			event :
			new jQuery.Event( type, typeof event === "object" && event );

		// Trigger bitmask: & 1 for native handlers; & 2 for jQuery (always true)
		event.isTrigger = onlyHandlers ? 2 : 3;
		event.namespace = namespaces.join(".");
		event.namespace_re = event.namespace ?
			new RegExp( "(^|\\.)" + namespaces.join("\\.(?:.*\\.|)") + "(\\.|$)" ) :
			null;

		// Clean up the event in case it is being reused
		event.result = undefined;
		if ( !event.target ) {
			event.target = elem;
		}

		// Clone any incoming data and prepend the event, creating the handler arg list
		data = data == null ?
			[ event ] :
			jQuery.makeArray( data, [ event ] );

		// Allow special events to draw outside the lines
		special = jQuery.event.special[ type ] || {};
		if ( !onlyHandlers && special.trigger && special.trigger.apply( elem, data ) === false ) {
			return;
		}

		// Determine event propagation path in advance, per W3C events spec (#9951)
		// Bubble up to document, then to window; watch for a global ownerDocument var (#9724)
		if ( !onlyHandlers && !special.noBubble && !jQuery.isWindow( elem ) ) {

			bubbleType = special.delegateType || type;
			if ( !rfocusMorph.test( bubbleType + type ) ) {
				cur = cur.parentNode;
			}
			for ( ; cur; cur = cur.parentNode ) {
				eventPath.push( cur );
				tmp = cur;
			}

			// Only add window if we got to document (e.g., not plain obj or detached DOM)
			if ( tmp === (elem.ownerDocument || document) ) {
				eventPath.push( tmp.defaultView || tmp.parentWindow || window );
			}
		}

		// Fire handlers on the event path
		i = 0;
		while ( (cur = eventPath[i++]) && !event.isPropagationStopped() ) {

			event.type = i > 1 ?
				bubbleType :
				special.bindType || type;

			// jQuery handler
			handle = ( jQuery._data( cur, "events" ) || {} )[ event.type ] && jQuery._data( cur, "handle" );
			if ( handle ) {
				handle.apply( cur, data );
			}

			// Native handler
			handle = ontype && cur[ ontype ];
			if ( handle && handle.apply && jQuery.acceptData( cur ) ) {
				event.result = handle.apply( cur, data );
				if ( event.result === false ) {
					event.preventDefault();
				}
			}
		}
		event.type = type;

		// If nobody prevented the default action, do it now
		if ( !onlyHandlers && !event.isDefaultPrevented() ) {

			if ( (!special._default || special._default.apply( eventPath.pop(), data ) === false) &&
				jQuery.acceptData( elem ) ) {

				// Call a native DOM method on the target with the same name name as the event.
				// Can't use an .isFunction() check here because IE6/7 fails that test.
				// Don't do default actions on window, that's where global variables be (#6170)
				if ( ontype && elem[ type ] && !jQuery.isWindow( elem ) ) {

					// Don't re-trigger an onFOO event when we call its FOO() method
					tmp = elem[ ontype ];

					if ( tmp ) {
						elem[ ontype ] = null;
					}

					// Prevent re-triggering of the same event, since we already bubbled it above
					jQuery.event.triggered = type;
					try {
						elem[ type ]();
					} catch ( e ) {
						// IE<9 dies on focus/blur to hidden element (#1486,#12518)
						// only reproducible on winXP IE8 native, not IE9 in IE8 mode
					}
					jQuery.event.triggered = undefined;

					if ( tmp ) {
						elem[ ontype ] = tmp;
					}
				}
			}
		}

		return event.result;
	},

	dispatch: function( event ) {

		// Make a writable jQuery.Event from the native event object
		event = jQuery.event.fix( event );

		var i, ret, handleObj, matched, j,
			handlerQueue = [],
			args = slice.call( arguments ),
			handlers = ( jQuery._data( this, "events" ) || {} )[ event.type ] || [],
			special = jQuery.event.special[ event.type ] || {};

		// Use the fix-ed jQuery.Event rather than the (read-only) native event
		args[0] = event;
		event.delegateTarget = this;

		// Call the preDispatch hook for the mapped type, and let it bail if desired
		if ( special.preDispatch && special.preDispatch.call( this, event ) === false ) {
			return;
		}

		// Determine handlers
		handlerQueue = jQuery.event.handlers.call( this, event, handlers );

		// Run delegates first; they may want to stop propagation beneath us
		i = 0;
		while ( (matched = handlerQueue[ i++ ]) && !event.isPropagationStopped() ) {
			event.currentTarget = matched.elem;

			j = 0;
			while ( (handleObj = matched.handlers[ j++ ]) && !event.isImmediatePropagationStopped() ) {

				// Triggered event must either 1) have no namespace, or
				// 2) have namespace(s) a subset or equal to those in the bound event (both can have no namespace).
				if ( !event.namespace_re || event.namespace_re.test( handleObj.namespace ) ) {

					event.handleObj = handleObj;
					event.data = handleObj.data;

					ret = ( (jQuery.event.special[ handleObj.origType ] || {}).handle || handleObj.handler )
							.apply( matched.elem, args );

					if ( ret !== undefined ) {
						if ( (event.result = ret) === false ) {
							event.preventDefault();
							event.stopPropagation();
						}
					}
				}
			}
		}

		// Call the postDispatch hook for the mapped type
		if ( special.postDispatch ) {
			special.postDispatch.call( this, event );
		}

		return event.result;
	},

	handlers: function( event, handlers ) {
		var sel, handleObj, matches, i,
			handlerQueue = [],
			delegateCount = handlers.delegateCount,
			cur = event.target;

		// Find delegate handlers
		// Black-hole SVG <use> instance trees (#13180)
		// Avoid non-left-click bubbling in Firefox (#3861)
		if ( delegateCount && cur.nodeType && (!event.button || event.type !== "click") ) {

			/* jshint eqeqeq: false */
			for ( ; cur != this; cur = cur.parentNode || this ) {
				/* jshint eqeqeq: true */

				// Don't check non-elements (#13208)
				// Don't process clicks on disabled elements (#6911, #8165, #11382, #11764)
				if ( cur.nodeType === 1 && (cur.disabled !== true || event.type !== "click") ) {
					matches = [];
					for ( i = 0; i < delegateCount; i++ ) {
						handleObj = handlers[ i ];

						// Don't conflict with Object.prototype properties (#13203)
						sel = handleObj.selector + " ";

						if ( matches[ sel ] === undefined ) {
							matches[ sel ] = handleObj.needsContext ?
								jQuery( sel, this ).index( cur ) >= 0 :
								jQuery.find( sel, this, null, [ cur ] ).length;
						}
						if ( matches[ sel ] ) {
							matches.push( handleObj );
						}
					}
					if ( matches.length ) {
						handlerQueue.push({ elem: cur, handlers: matches });
					}
				}
			}
		}

		// Add the remaining (directly-bound) handlers
		if ( delegateCount < handlers.length ) {
			handlerQueue.push({ elem: this, handlers: handlers.slice( delegateCount ) });
		}

		return handlerQueue;
	},

	fix: function( event ) {
		if ( event[ jQuery.expando ] ) {
			return event;
		}

		// Create a writable copy of the event object and normalize some properties
		var i, prop, copy,
			type = event.type,
			originalEvent = event,
			fixHook = this.fixHooks[ type ];

		if ( !fixHook ) {
			this.fixHooks[ type ] = fixHook =
				rmouseEvent.test( type ) ? this.mouseHooks :
				rkeyEvent.test( type ) ? this.keyHooks :
				{};
		}
		copy = fixHook.props ? this.props.concat( fixHook.props ) : this.props;

		event = new jQuery.Event( originalEvent );

		i = copy.length;
		while ( i-- ) {
			prop = copy[ i ];
			event[ prop ] = originalEvent[ prop ];
		}

		// Support: IE<9
		// Fix target property (#1925)
		if ( !event.target ) {
			event.target = originalEvent.srcElement || document;
		}

		// Support: Chrome 23+, Safari?
		// Target should not be a text node (#504, #13143)
		if ( event.target.nodeType === 3 ) {
			event.target = event.target.parentNode;
		}

		// Support: IE<9
		// For mouse/key events, metaKey==false if it's undefined (#3368, #11328)
		event.metaKey = !!event.metaKey;

		return fixHook.filter ? fixHook.filter( event, originalEvent ) : event;
	},

	// Includes some event props shared by KeyEvent and MouseEvent
	props: "altKey bubbles cancelable ctrlKey currentTarget eventPhase metaKey relatedTarget shiftKey target timeStamp view which".split(" "),

	fixHooks: {},

	keyHooks: {
		props: "char charCode key keyCode".split(" "),
		filter: function( event, original ) {

			// Add which for key events
			if ( event.which == null ) {
				event.which = original.charCode != null ? original.charCode : original.keyCode;
			}

			return event;
		}
	},

	mouseHooks: {
		props: "button buttons clientX clientY fromElement offsetX offsetY pageX pageY screenX screenY toElement".split(" "),
		filter: function( event, original ) {
			var body, eventDoc, doc,
				button = original.button,
				fromElement = original.fromElement;

			// Calculate pageX/Y if missing and clientX/Y available
			if ( event.pageX == null && original.clientX != null ) {
				eventDoc = event.target.ownerDocument || document;
				doc = eventDoc.documentElement;
				body = eventDoc.body;

				event.pageX = original.clientX + ( doc && doc.scrollLeft || body && body.scrollLeft || 0 ) - ( doc && doc.clientLeft || body && body.clientLeft || 0 );
				event.pageY = original.clientY + ( doc && doc.scrollTop  || body && body.scrollTop  || 0 ) - ( doc && doc.clientTop  || body && body.clientTop  || 0 );
			}

			// Add relatedTarget, if necessary
			if ( !event.relatedTarget && fromElement ) {
				event.relatedTarget = fromElement === event.target ? original.toElement : fromElement;
			}

			// Add which for click: 1 === left; 2 === middle; 3 === right
			// Note: button is not normalized, so don't use it
			if ( !event.which && button !== undefined ) {
				event.which = ( button & 1 ? 1 : ( button & 2 ? 3 : ( button & 4 ? 2 : 0 ) ) );
			}

			return event;
		}
	},

	special: {
		load: {
			// Prevent triggered image.load events from bubbling to window.load
			noBubble: true
		},
		focus: {
			// Fire native event if possible so blur/focus sequence is correct
			trigger: function() {
				if ( this !== safeActiveElement() && this.focus ) {
					try {
						this.focus();
						return false;
					} catch ( e ) {
						// Support: IE<9
						// If we error on focus to hidden element (#1486, #12518),
						// let .trigger() run the handlers
					}
				}
			},
			delegateType: "focusin"
		},
		blur: {
			trigger: function() {
				if ( this === safeActiveElement() && this.blur ) {
					this.blur();
					return false;
				}
			},
			delegateType: "focusout"
		},
		click: {
			// For checkbox, fire native event so checked state will be right
			trigger: function() {
				if ( jQuery.nodeName( this, "input" ) && this.type === "checkbox" && this.click ) {
					this.click();
					return false;
				}
			},

			// For cross-browser consistency, don't fire native .click() on links
			_default: function( event ) {
				return jQuery.nodeName( event.target, "a" );
			}
		},

		beforeunload: {
			postDispatch: function( event ) {

				// Even when returnValue equals to undefined Firefox will still show alert
				if ( event.result !== undefined ) {
					event.originalEvent.returnValue = event.result;
				}
			}
		}
	},

	simulate: function( type, elem, event, bubble ) {
		// Piggyback on a donor event to simulate a different one.
		// Fake originalEvent to avoid donor's stopPropagation, but if the
		// simulated event prevents default then we do the same on the donor.
		var e = jQuery.extend(
			new jQuery.Event(),
			event,
			{
				type: type,
				isSimulated: true,
				originalEvent: {}
			}
		);
		if ( bubble ) {
			jQuery.event.trigger( e, null, elem );
		} else {
			jQuery.event.dispatch.call( elem, e );
		}
		if ( e.isDefaultPrevented() ) {
			event.preventDefault();
		}
	}
};

jQuery.removeEvent = document.removeEventListener ?
	function( elem, type, handle ) {
		if ( elem.removeEventListener ) {
			elem.removeEventListener( type, handle, false );
		}
	} :
	function( elem, type, handle ) {
		var name = "on" + type;

		if ( elem.detachEvent ) {

			// #8545, #7054, preventing memory leaks for custom events in IE6-8
			// detachEvent needed property on element, by name of that event, to properly expose it to GC
			if ( typeof elem[ name ] === strundefined ) {
				elem[ name ] = null;
			}

			elem.detachEvent( name, handle );
		}
	};

jQuery.Event = function( src, props ) {
	// Allow instantiation without the 'new' keyword
	if ( !(this instanceof jQuery.Event) ) {
		return new jQuery.Event( src, props );
	}

	// Event object
	if ( src && src.type ) {
		this.originalEvent = src;
		this.type = src.type;

		// Events bubbling up the document may have been marked as prevented
		// by a handler lower down the tree; reflect the correct value.
		this.isDefaultPrevented = src.defaultPrevented ||
				src.defaultPrevented === undefined && (
				// Support: IE < 9
				src.returnValue === false ||
				// Support: Android < 4.0
				src.getPreventDefault && src.getPreventDefault() ) ?
			returnTrue :
			returnFalse;

	// Event type
	} else {
		this.type = src;
	}

	// Put explicitly provided properties onto the event object
	if ( props ) {
		jQuery.extend( this, props );
	}

	// Create a timestamp if incoming event doesn't have one
	this.timeStamp = src && src.timeStamp || jQuery.now();

	// Mark it as fixed
	this[ jQuery.expando ] = true;
};

// jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
// http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
jQuery.Event.prototype = {
	isDefaultPrevented: returnFalse,
	isPropagationStopped: returnFalse,
	isImmediatePropagationStopped: returnFalse,

	preventDefault: function() {
		var e = this.originalEvent;

		this.isDefaultPrevented = returnTrue;
		if ( !e ) {
			return;
		}

		// If preventDefault exists, run it on the original event
		if ( e.preventDefault ) {
			e.preventDefault();

		// Support: IE
		// Otherwise set the returnValue property of the original event to false
		} else {
			e.returnValue = false;
		}
	},
	stopPropagation: function() {
		var e = this.originalEvent;

		this.isPropagationStopped = returnTrue;
		if ( !e ) {
			return;
		}
		// If stopPropagation exists, run it on the original event
		if ( e.stopPropagation ) {
			e.stopPropagation();
		}

		// Support: IE
		// Set the cancelBubble property of the original event to true
		e.cancelBubble = true;
	},
	stopImmediatePropagation: function() {
		this.isImmediatePropagationStopped = returnTrue;
		this.stopPropagation();
	}
};

// Create mouseenter/leave events using mouseover/out and event-time checks
jQuery.each({
	mouseenter: "mouseover",
	mouseleave: "mouseout"
}, function( orig, fix ) {
	jQuery.event.special[ orig ] = {
		delegateType: fix,
		bindType: fix,

		handle: function( event ) {
			var ret,
				target = this,
				related = event.relatedTarget,
				handleObj = event.handleObj;

			// For mousenter/leave call the handler if related is outside the target.
			// NB: No relatedTarget if the mouse left/entered the browser window
			if ( !related || (related !== target && !jQuery.contains( target, related )) ) {
				event.type = handleObj.origType;
				ret = handleObj.handler.apply( this, arguments );
				event.type = fix;
			}
			return ret;
		}
	};
});

// IE submit delegation
if ( !support.submitBubbles ) {

	jQuery.event.special.submit = {
		setup: function() {
			// Only need this for delegated form submit events
			if ( jQuery.nodeName( this, "form" ) ) {
				return false;
			}

			// Lazy-add a submit handler when a descendant form may potentially be submitted
			jQuery.event.add( this, "click._submit keypress._submit", function( e ) {
				// Node name check avoids a VML-related crash in IE (#9807)
				var elem = e.target,
					form = jQuery.nodeName( elem, "input" ) || jQuery.nodeName( elem, "button" ) ? elem.form : undefined;
				if ( form && !jQuery._data( form, "submitBubbles" ) ) {
					jQuery.event.add( form, "submit._submit", function( event ) {
						event._submit_bubble = true;
					});
					jQuery._data( form, "submitBubbles", true );
				}
			});
			// return undefined since we don't need an event listener
		},

		postDispatch: function( event ) {
			// If form was submitted by the user, bubble the event up the tree
			if ( event._submit_bubble ) {
				delete event._submit_bubble;
				if ( this.parentNode && !event.isTrigger ) {
					jQuery.event.simulate( "submit", this.parentNode, event, true );
				}
			}
		},

		teardown: function() {
			// Only need this for delegated form submit events
			if ( jQuery.nodeName( this, "form" ) ) {
				return false;
			}

			// Remove delegated handlers; cleanData eventually reaps submit handlers attached above
			jQuery.event.remove( this, "._submit" );
		}
	};
}

// IE change delegation and checkbox/radio fix
if ( !support.changeBubbles ) {

	jQuery.event.special.change = {

		setup: function() {

			if ( rformElems.test( this.nodeName ) ) {
				// IE doesn't fire change on a check/radio until blur; trigger it on click
				// after a propertychange. Eat the blur-change in special.change.handle.
				// This still fires onchange a second time for check/radio after blur.
				if ( this.type === "checkbox" || this.type === "radio" ) {
					jQuery.event.add( this, "propertychange._change", function( event ) {
						if ( event.originalEvent.propertyName === "checked" ) {
							this._just_changed = true;
						}
					});
					jQuery.event.add( this, "click._change", function( event ) {
						if ( this._just_changed && !event.isTrigger ) {
							this._just_changed = false;
						}
						// Allow triggered, simulated change events (#11500)
						jQuery.event.simulate( "change", this, event, true );
					});
				}
				return false;
			}
			// Delegated event; lazy-add a change handler on descendant inputs
			jQuery.event.add( this, "beforeactivate._change", function( e ) {
				var elem = e.target;

				if ( rformElems.test( elem.nodeName ) && !jQuery._data( elem, "changeBubbles" ) ) {
					jQuery.event.add( elem, "change._change", function( event ) {
						if ( this.parentNode && !event.isSimulated && !event.isTrigger ) {
							jQuery.event.simulate( "change", this.parentNode, event, true );
						}
					});
					jQuery._data( elem, "changeBubbles", true );
				}
			});
		},

		handle: function( event ) {
			var elem = event.target;

			// Swallow native change events from checkbox/radio, we already triggered them above
			if ( this !== elem || event.isSimulated || event.isTrigger || (elem.type !== "radio" && elem.type !== "checkbox") ) {
				return event.handleObj.handler.apply( this, arguments );
			}
		},

		teardown: function() {
			jQuery.event.remove( this, "._change" );

			return !rformElems.test( this.nodeName );
		}
	};
}

// Create "bubbling" focus and blur events
if ( !support.focusinBubbles ) {
	jQuery.each({ focus: "focusin", blur: "focusout" }, function( orig, fix ) {

		// Attach a single capturing handler on the document while someone wants focusin/focusout
		var handler = function( event ) {
				jQuery.event.simulate( fix, event.target, jQuery.event.fix( event ), true );
			};

		jQuery.event.special[ fix ] = {
			setup: function() {
				var doc = this.ownerDocument || this,
					attaches = jQuery._data( doc, fix );

				if ( !attaches ) {
					doc.addEventListener( orig, handler, true );
				}
				jQuery._data( doc, fix, ( attaches || 0 ) + 1 );
			},
			teardown: function() {
				var doc = this.ownerDocument || this,
					attaches = jQuery._data( doc, fix ) - 1;

				if ( !attaches ) {
					doc.removeEventListener( orig, handler, true );
					jQuery._removeData( doc, fix );
				} else {
					jQuery._data( doc, fix, attaches );
				}
			}
		};
	});
}

jQuery.fn.extend({

	on: function( types, selector, data, fn, /*INTERNAL*/ one ) {
		var type, origFn;

		// Types can be a map of types/handlers
		if ( typeof types === "object" ) {
			// ( types-Object, selector, data )
			if ( typeof selector !== "string" ) {
				// ( types-Object, data )
				data = data || selector;
				selector = undefined;
			}
			for ( type in types ) {
				this.on( type, selector, data, types[ type ], one );
			}
			return this;
		}

		if ( data == null && fn == null ) {
			// ( types, fn )
			fn = selector;
			data = selector = undefined;
		} else if ( fn == null ) {
			if ( typeof selector === "string" ) {
				// ( types, selector, fn )
				fn = data;
				data = undefined;
			} else {
				// ( types, data, fn )
				fn = data;
				data = selector;
				selector = undefined;
			}
		}
		if ( fn === false ) {
			fn = returnFalse;
		} else if ( !fn ) {
			return this;
		}

		if ( one === 1 ) {
			origFn = fn;
			fn = function( event ) {
				// Can use an empty set, since event contains the info
				jQuery().off( event );
				return origFn.apply( this, arguments );
			};
			// Use same guid so caller can remove using origFn
			fn.guid = origFn.guid || ( origFn.guid = jQuery.guid++ );
		}
		return this.each( function() {
			jQuery.event.add( this, types, fn, data, selector );
		});
	},
	one: function( types, selector, data, fn ) {
		return this.on( types, selector, data, fn, 1 );
	},
	off: function( types, selector, fn ) {
		var handleObj, type;
		if ( types && types.preventDefault && types.handleObj ) {
			// ( event )  dispatched jQuery.Event
			handleObj = types.handleObj;
			jQuery( types.delegateTarget ).off(
				handleObj.namespace ? handleObj.origType + "." + handleObj.namespace : handleObj.origType,
				handleObj.selector,
				handleObj.handler
			);
			return this;
		}
		if ( typeof types === "object" ) {
			// ( types-object [, selector] )
			for ( type in types ) {
				this.off( type, selector, types[ type ] );
			}
			return this;
		}
		if ( selector === false || typeof selector === "function" ) {
			// ( types [, fn] )
			fn = selector;
			selector = undefined;
		}
		if ( fn === false ) {
			fn = returnFalse;
		}
		return this.each(function() {
			jQuery.event.remove( this, types, fn, selector );
		});
	},

	trigger: function( type, data ) {
		return this.each(function() {
			jQuery.event.trigger( type, data, this );
		});
	},
	triggerHandler: function( type, data ) {
		var elem = this[0];
		if ( elem ) {
			return jQuery.event.trigger( type, data, elem, true );
		}
	}
});


function createSafeFragment( document ) {
	var list = nodeNames.split( "|" ),
		safeFrag = document.createDocumentFragment();

	if ( safeFrag.createElement ) {
		while ( list.length ) {
			safeFrag.createElement(
				list.pop()
			);
		}
	}
	return safeFrag;
}

var nodeNames = "abbr|article|aside|audio|bdi|canvas|data|datalist|details|figcaption|figure|footer|" +
		"header|hgroup|mark|meter|nav|output|progress|section|summary|time|video",
	rinlinejQuery = / jQuery\d+="(?:null|\d+)"/g,
	rnoshimcache = new RegExp("<(?:" + nodeNames + ")[\\s/>]", "i"),
	rleadingWhitespace = /^\s+/,
	rxhtmlTag = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([\w:]+)[^>]*)\/>/gi,
	rtagName = /<([\w:]+)/,
	rtbody = /<tbody/i,
	rhtml = /<|&#?\w+;/,
	rnoInnerhtml = /<(?:script|style|link)/i,
	// checked="checked" or checked
	rchecked = /checked\s*(?:[^=]|=\s*.checked.)/i,
	rscriptType = /^$|\/(?:java|ecma)script/i,
	rscriptTypeMasked = /^true\/(.*)/,
	rcleanScript = /^\s*<!(?:\[CDATA\[|--)|(?:\]\]|--)>\s*$/g,

	// We have to close these tags to support XHTML (#13200)
	wrapMap = {
		option: [ 1, "<select multiple='multiple'>", "</select>" ],
		legend: [ 1, "<fieldset>", "</fieldset>" ],
		area: [ 1, "<map>", "</map>" ],
		param: [ 1, "<object>", "</object>" ],
		thead: [ 1, "<table>", "</table>" ],
		tr: [ 2, "<table><tbody>", "</tbody></table>" ],
		col: [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ],
		td: [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ],

		// IE6-8 can't serialize link, script, style, or any html5 (NoScope) tags,
		// unless wrapped in a div with non-breaking characters in front of it.
		_default: support.htmlSerialize ? [ 0, "", "" ] : [ 1, "X<div>", "</div>"  ]
	},
	safeFragment = createSafeFragment( document ),
	fragmentDiv = safeFragment.appendChild( document.createElement("div") );

wrapMap.optgroup = wrapMap.option;
wrapMap.tbody = wrapMap.tfoot = wrapMap.colgroup = wrapMap.caption = wrapMap.thead;
wrapMap.th = wrapMap.td;

function getAll( context, tag ) {
	var elems, elem,
		i = 0,
		found = typeof context.getElementsByTagName !== strundefined ? context.getElementsByTagName( tag || "*" ) :
			typeof context.querySelectorAll !== strundefined ? context.querySelectorAll( tag || "*" ) :
			undefined;

	if ( !found ) {
		for ( found = [], elems = context.childNodes || context; (elem = elems[i]) != null; i++ ) {
			if ( !tag || jQuery.nodeName( elem, tag ) ) {
				found.push( elem );
			} else {
				jQuery.merge( found, getAll( elem, tag ) );
			}
		}
	}

	return tag === undefined || tag && jQuery.nodeName( context, tag ) ?
		jQuery.merge( [ context ], found ) :
		found;
}

// Used in buildFragment, fixes the defaultChecked property
function fixDefaultChecked( elem ) {
	if ( rcheckableType.test( elem.type ) ) {
		elem.defaultChecked = elem.checked;
	}
}

// Support: IE<8
// Manipulating tables requires a tbody
function manipulationTarget( elem, content ) {
	return jQuery.nodeName( elem, "table" ) &&
		jQuery.nodeName( content.nodeType !== 11 ? content : content.firstChild, "tr" ) ?

		elem.getElementsByTagName("tbody")[0] ||
			elem.appendChild( elem.ownerDocument.createElement("tbody") ) :
		elem;
}

// Replace/restore the type attribute of script elements for safe DOM manipulation
function disableScript( elem ) {
	elem.type = (jQuery.find.attr( elem, "type" ) !== null) + "/" + elem.type;
	return elem;
}
function restoreScript( elem ) {
	var match = rscriptTypeMasked.exec( elem.type );
	if ( match ) {
		elem.type = match[1];
	} else {
		elem.removeAttribute("type");
	}
	return elem;
}

// Mark scripts as having already been evaluated
function setGlobalEval( elems, refElements ) {
	var elem,
		i = 0;
	for ( ; (elem = elems[i]) != null; i++ ) {
		jQuery._data( elem, "globalEval", !refElements || jQuery._data( refElements[i], "globalEval" ) );
	}
}

function cloneCopyEvent( src, dest ) {

	if ( dest.nodeType !== 1 || !jQuery.hasData( src ) ) {
		return;
	}

	var type, i, l,
		oldData = jQuery._data( src ),
		curData = jQuery._data( dest, oldData ),
		events = oldData.events;

	if ( events ) {
		delete curData.handle;
		curData.events = {};

		for ( type in events ) {
			for ( i = 0, l = events[ type ].length; i < l; i++ ) {
				jQuery.event.add( dest, type, events[ type ][ i ] );
			}
		}
	}

	// make the cloned public data object a copy from the original
	if ( curData.data ) {
		curData.data = jQuery.extend( {}, curData.data );
	}
}

function fixCloneNodeIssues( src, dest ) {
	var nodeName, e, data;

	// We do not need to do anything for non-Elements
	if ( dest.nodeType !== 1 ) {
		return;
	}

	nodeName = dest.nodeName.toLowerCase();

	// IE6-8 copies events bound via attachEvent when using cloneNode.
	if ( !support.noCloneEvent && dest[ jQuery.expando ] ) {
		data = jQuery._data( dest );

		for ( e in data.events ) {
			jQuery.removeEvent( dest, e, data.handle );
		}

		// Event data gets referenced instead of copied if the expando gets copied too
		dest.removeAttribute( jQuery.expando );
	}

	// IE blanks contents when cloning scripts, and tries to evaluate newly-set text
	if ( nodeName === "script" && dest.text !== src.text ) {
		disableScript( dest ).text = src.text;
		restoreScript( dest );

	// IE6-10 improperly clones children of object elements using classid.
	// IE10 throws NoModificationAllowedError if parent is null, #12132.
	} else if ( nodeName === "object" ) {
		if ( dest.parentNode ) {
			dest.outerHTML = src.outerHTML;
		}

		// This path appears unavoidable for IE9. When cloning an object
		// element in IE9, the outerHTML strategy above is not sufficient.
		// If the src has innerHTML and the destination does not,
		// copy the src.innerHTML into the dest.innerHTML. #10324
		if ( support.html5Clone && ( src.innerHTML && !jQuery.trim(dest.innerHTML) ) ) {
			dest.innerHTML = src.innerHTML;
		}

	} else if ( nodeName === "input" && rcheckableType.test( src.type ) ) {
		// IE6-8 fails to persist the checked state of a cloned checkbox
		// or radio button. Worse, IE6-7 fail to give the cloned element
		// a checked appearance if the defaultChecked value isn't also set

		dest.defaultChecked = dest.checked = src.checked;

		// IE6-7 get confused and end up setting the value of a cloned
		// checkbox/radio button to an empty string instead of "on"
		if ( dest.value !== src.value ) {
			dest.value = src.value;
		}

	// IE6-8 fails to return the selected option to the default selected
	// state when cloning options
	} else if ( nodeName === "option" ) {
		dest.defaultSelected = dest.selected = src.defaultSelected;

	// IE6-8 fails to set the defaultValue to the correct value when
	// cloning other types of input fields
	} else if ( nodeName === "input" || nodeName === "textarea" ) {
		dest.defaultValue = src.defaultValue;
	}
}

jQuery.extend({
	clone: function( elem, dataAndEvents, deepDataAndEvents ) {
		var destElements, node, clone, i, srcElements,
			inPage = jQuery.contains( elem.ownerDocument, elem );

		if ( support.html5Clone || jQuery.isXMLDoc(elem) || !rnoshimcache.test( "<" + elem.nodeName + ">" ) ) {
			clone = elem.cloneNode( true );

		// IE<=8 does not properly clone detached, unknown element nodes
		} else {
			fragmentDiv.innerHTML = elem.outerHTML;
			fragmentDiv.removeChild( clone = fragmentDiv.firstChild );
		}

		if ( (!support.noCloneEvent || !support.noCloneChecked) &&
				(elem.nodeType === 1 || elem.nodeType === 11) && !jQuery.isXMLDoc(elem) ) {

			// We eschew Sizzle here for performance reasons: http://jsperf.com/getall-vs-sizzle/2
			destElements = getAll( clone );
			srcElements = getAll( elem );

			// Fix all IE cloning issues
			for ( i = 0; (node = srcElements[i]) != null; ++i ) {
				// Ensure that the destination node is not null; Fixes #9587
				if ( destElements[i] ) {
					fixCloneNodeIssues( node, destElements[i] );
				}
			}
		}

		// Copy the events from the original to the clone
		if ( dataAndEvents ) {
			if ( deepDataAndEvents ) {
				srcElements = srcElements || getAll( elem );
				destElements = destElements || getAll( clone );

				for ( i = 0; (node = srcElements[i]) != null; i++ ) {
					cloneCopyEvent( node, destElements[i] );
				}
			} else {
				cloneCopyEvent( elem, clone );
			}
		}

		// Preserve script evaluation history
		destElements = getAll( clone, "script" );
		if ( destElements.length > 0 ) {
			setGlobalEval( destElements, !inPage && getAll( elem, "script" ) );
		}

		destElements = srcElements = node = null;

		// Return the cloned set
		return clone;
	},

	buildFragment: function( elems, context, scripts, selection ) {
		var j, elem, contains,
			tmp, tag, tbody, wrap,
			l = elems.length,

			// Ensure a safe fragment
			safe = createSafeFragment( context ),

			nodes = [],
			i = 0;

		for ( ; i < l; i++ ) {
			elem = elems[ i ];

			if ( elem || elem === 0 ) {

				// Add nodes directly
				if ( jQuery.type( elem ) === "object" ) {
					jQuery.merge( nodes, elem.nodeType ? [ elem ] : elem );

				// Convert non-html into a text node
				} else if ( !rhtml.test( elem ) ) {
					nodes.push( context.createTextNode( elem ) );

				// Convert html into DOM nodes
				} else {
					tmp = tmp || safe.appendChild( context.createElement("div") );

					// Deserialize a standard representation
					tag = (rtagName.exec( elem ) || [ "", "" ])[ 1 ].toLowerCase();
					wrap = wrapMap[ tag ] || wrapMap._default;

					tmp.innerHTML = wrap[1] + elem.replace( rxhtmlTag, "<$1></$2>" ) + wrap[2];

					// Descend through wrappers to the right content
					j = wrap[0];
					while ( j-- ) {
						tmp = tmp.lastChild;
					}

					// Manually add leading whitespace removed by IE
					if ( !support.leadingWhitespace && rleadingWhitespace.test( elem ) ) {
						nodes.push( context.createTextNode( rleadingWhitespace.exec( elem )[0] ) );
					}

					// Remove IE's autoinserted <tbody> from table fragments
					if ( !support.tbody ) {

						// String was a <table>, *may* have spurious <tbody>
						elem = tag === "table" && !rtbody.test( elem ) ?
							tmp.firstChild :

							// String was a bare <thead> or <tfoot>
							wrap[1] === "<table>" && !rtbody.test( elem ) ?
								tmp :
								0;

						j = elem && elem.childNodes.length;
						while ( j-- ) {
							if ( jQuery.nodeName( (tbody = elem.childNodes[j]), "tbody" ) && !tbody.childNodes.length ) {
								elem.removeChild( tbody );
							}
						}
					}

					jQuery.merge( nodes, tmp.childNodes );

					// Fix #12392 for WebKit and IE > 9
					tmp.textContent = "";

					// Fix #12392 for oldIE
					while ( tmp.firstChild ) {
						tmp.removeChild( tmp.firstChild );
					}

					// Remember the top-level container for proper cleanup
					tmp = safe.lastChild;
				}
			}
		}

		// Fix #11356: Clear elements from fragment
		if ( tmp ) {
			safe.removeChild( tmp );
		}

		// Reset defaultChecked for any radios and checkboxes
		// about to be appended to the DOM in IE 6/7 (#8060)
		if ( !support.appendChecked ) {
			jQuery.grep( getAll( nodes, "input" ), fixDefaultChecked );
		}

		i = 0;
		while ( (elem = nodes[ i++ ]) ) {

			// #4087 - If origin and destination elements are the same, and this is
			// that element, do not do anything
			if ( selection && jQuery.inArray( elem, selection ) !== -1 ) {
				continue;
			}

			contains = jQuery.contains( elem.ownerDocument, elem );

			// Append to fragment
			tmp = getAll( safe.appendChild( elem ), "script" );

			// Preserve script evaluation history
			if ( contains ) {
				setGlobalEval( tmp );
			}

			// Capture executables
			if ( scripts ) {
				j = 0;
				while ( (elem = tmp[ j++ ]) ) {
					if ( rscriptType.test( elem.type || "" ) ) {
						scripts.push( elem );
					}
				}
			}
		}

		tmp = null;

		return safe;
	},

	cleanData: function( elems, /* internal */ acceptData ) {
		var elem, type, id, data,
			i = 0,
			internalKey = jQuery.expando,
			cache = jQuery.cache,
			deleteExpando = support.deleteExpando,
			special = jQuery.event.special;

		for ( ; (elem = elems[i]) != null; i++ ) {
			if ( acceptData || jQuery.acceptData( elem ) ) {

				id = elem[ internalKey ];
				data = id && cache[ id ];

				if ( data ) {
					if ( data.events ) {
						for ( type in data.events ) {
							if ( special[ type ] ) {
								jQuery.event.remove( elem, type );

							// This is a shortcut to avoid jQuery.event.remove's overhead
							} else {
								jQuery.removeEvent( elem, type, data.handle );
							}
						}
					}

					// Remove cache only if it was not already removed by jQuery.event.remove
					if ( cache[ id ] ) {

						delete cache[ id ];

						// IE does not allow us to delete expando properties from nodes,
						// nor does it have a removeAttribute function on Document nodes;
						// we must handle all of these cases
						if ( deleteExpando ) {
							delete elem[ internalKey ];

						} else if ( typeof elem.removeAttribute !== strundefined ) {
							elem.removeAttribute( internalKey );

						} else {
							elem[ internalKey ] = null;
						}

						deletedIds.push( id );
					}
				}
			}
		}
	}
});

jQuery.fn.extend({
	text: function( value ) {
		return access( this, function( value ) {
			return value === undefined ?
				jQuery.text( this ) :
				this.empty().append( ( this[0] && this[0].ownerDocument || document ).createTextNode( value ) );
		}, null, value, arguments.length );
	},

	append: function() {
		return this.domManip( arguments, function( elem ) {
			if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
				var target = manipulationTarget( this, elem );
				target.appendChild( elem );
			}
		});
	},

	prepend: function() {
		return this.domManip( arguments, function( elem ) {
			if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
				var target = manipulationTarget( this, elem );
				target.insertBefore( elem, target.firstChild );
			}
		});
	},

	before: function() {
		return this.domManip( arguments, function( elem ) {
			if ( this.parentNode ) {
				this.parentNode.insertBefore( elem, this );
			}
		});
	},

	after: function() {
		return this.domManip( arguments, function( elem ) {
			if ( this.parentNode ) {
				this.parentNode.insertBefore( elem, this.nextSibling );
			}
		});
	},

	remove: function( selector, keepData /* Internal Use Only */ ) {
		var elem,
			elems = selector ? jQuery.filter( selector, this ) : this,
			i = 0;

		for ( ; (elem = elems[i]) != null; i++ ) {

			if ( !keepData && elem.nodeType === 1 ) {
				jQuery.cleanData( getAll( elem ) );
			}

			if ( elem.parentNode ) {
				if ( keepData && jQuery.contains( elem.ownerDocument, elem ) ) {
					setGlobalEval( getAll( elem, "script" ) );
				}
				elem.parentNode.removeChild( elem );
			}
		}

		return this;
	},

	empty: function() {
		var elem,
			i = 0;

		for ( ; (elem = this[i]) != null; i++ ) {
			// Remove element nodes and prevent memory leaks
			if ( elem.nodeType === 1 ) {
				jQuery.cleanData( getAll( elem, false ) );
			}

			// Remove any remaining nodes
			while ( elem.firstChild ) {
				elem.removeChild( elem.firstChild );
			}

			// If this is a select, ensure that it displays empty (#12336)
			// Support: IE<9
			if ( elem.options && jQuery.nodeName( elem, "select" ) ) {
				elem.options.length = 0;
			}
		}

		return this;
	},

	clone: function( dataAndEvents, deepDataAndEvents ) {
		dataAndEvents = dataAndEvents == null ? false : dataAndEvents;
		deepDataAndEvents = deepDataAndEvents == null ? dataAndEvents : deepDataAndEvents;

		return this.map(function() {
			return jQuery.clone( this, dataAndEvents, deepDataAndEvents );
		});
	},

	html: function( value ) {
		return access( this, function( value ) {
			var elem = this[ 0 ] || {},
				i = 0,
				l = this.length;

			if ( value === undefined ) {
				return elem.nodeType === 1 ?
					elem.innerHTML.replace( rinlinejQuery, "" ) :
					undefined;
			}

			// See if we can take a shortcut and just use innerHTML
			if ( typeof value === "string" && !rnoInnerhtml.test( value ) &&
				( support.htmlSerialize || !rnoshimcache.test( value )  ) &&
				( support.leadingWhitespace || !rleadingWhitespace.test( value ) ) &&
				!wrapMap[ (rtagName.exec( value ) || [ "", "" ])[ 1 ].toLowerCase() ] ) {

				value = value.replace( rxhtmlTag, "<$1></$2>" );

				try {
					for (; i < l; i++ ) {
						// Remove element nodes and prevent memory leaks
						elem = this[i] || {};
						if ( elem.nodeType === 1 ) {
							jQuery.cleanData( getAll( elem, false ) );
							elem.innerHTML = value;
						}
					}

					elem = 0;

				// If using innerHTML throws an exception, use the fallback method
				} catch(e) {}
			}

			if ( elem ) {
				this.empty().append( value );
			}
		}, null, value, arguments.length );
	},

	replaceWith: function() {
		var arg = arguments[ 0 ];

		// Make the changes, replacing each context element with the new content
		this.domManip( arguments, function( elem ) {
			arg = this.parentNode;

			jQuery.cleanData( getAll( this ) );

			if ( arg ) {
				arg.replaceChild( elem, this );
			}
		});

		// Force removal if there was no new content (e.g., from empty arguments)
		return arg && (arg.length || arg.nodeType) ? this : this.remove();
	},

	detach: function( selector ) {
		return this.remove( selector, true );
	},

	domManip: function( args, callback ) {

		// Flatten any nested arrays
		args = concat.apply( [], args );

		var first, node, hasScripts,
			scripts, doc, fragment,
			i = 0,
			l = this.length,
			set = this,
			iNoClone = l - 1,
			value = args[0],
			isFunction = jQuery.isFunction( value );

		// We can't cloneNode fragments that contain checked, in WebKit
		if ( isFunction ||
				( l > 1 && typeof value === "string" &&
					!support.checkClone && rchecked.test( value ) ) ) {
			return this.each(function( index ) {
				var self = set.eq( index );
				if ( isFunction ) {
					args[0] = value.call( this, index, self.html() );
				}
				self.domManip( args, callback );
			});
		}

		if ( l ) {
			fragment = jQuery.buildFragment( args, this[ 0 ].ownerDocument, false, this );
			first = fragment.firstChild;

			if ( fragment.childNodes.length === 1 ) {
				fragment = first;
			}

			if ( first ) {
				scripts = jQuery.map( getAll( fragment, "script" ), disableScript );
				hasScripts = scripts.length;

				// Use the original fragment for the last item instead of the first because it can end up
				// being emptied incorrectly in certain situations (#8070).
				for ( ; i < l; i++ ) {
					node = fragment;

					if ( i !== iNoClone ) {
						node = jQuery.clone( node, true, true );

						// Keep references to cloned scripts for later restoration
						if ( hasScripts ) {
							jQuery.merge( scripts, getAll( node, "script" ) );
						}
					}

					callback.call( this[i], node, i );
				}

				if ( hasScripts ) {
					doc = scripts[ scripts.length - 1 ].ownerDocument;

					// Reenable scripts
					jQuery.map( scripts, restoreScript );

					// Evaluate executable scripts on first document insertion
					for ( i = 0; i < hasScripts; i++ ) {
						node = scripts[ i ];
						if ( rscriptType.test( node.type || "" ) &&
							!jQuery._data( node, "globalEval" ) && jQuery.contains( doc, node ) ) {

							if ( node.src ) {
								// Optional AJAX dependency, but won't run scripts if not present
								if ( jQuery._evalUrl ) {
									jQuery._evalUrl( node.src );
								}
							} else {
								jQuery.globalEval( ( node.text || node.textContent || node.innerHTML || "" ).replace( rcleanScript, "" ) );
							}
						}
					}
				}

				// Fix #11809: Avoid leaking memory
				fragment = first = null;
			}
		}

		return this;
	}
});

jQuery.each({
	appendTo: "append",
	prependTo: "prepend",
	insertBefore: "before",
	insertAfter: "after",
	replaceAll: "replaceWith"
}, function( name, original ) {
	jQuery.fn[ name ] = function( selector ) {
		var elems,
			i = 0,
			ret = [],
			insert = jQuery( selector ),
			last = insert.length - 1;

		for ( ; i <= last; i++ ) {
			elems = i === last ? this : this.clone(true);
			jQuery( insert[i] )[ original ]( elems );

			// Modern browsers can apply jQuery collections as arrays, but oldIE needs a .get()
			push.apply( ret, elems.get() );
		}

		return this.pushStack( ret );
	};
});


var iframe,
	elemdisplay = {};

/**
 * Retrieve the actual display of a element
 * @param {String} name nodeName of the element
 * @param {Object} doc Document object
 */
// Called only from within defaultDisplay
function actualDisplay( name, doc ) {
	var elem = jQuery( doc.createElement( name ) ).appendTo( doc.body ),

		// getDefaultComputedStyle might be reliably used only on attached element
		display = window.getDefaultComputedStyle ?

			// Use of this method is a temporary fix (more like optmization) until something better comes along,
			// since it was removed from specification and supported only in FF
			window.getDefaultComputedStyle( elem[ 0 ] ).display : jQuery.css( elem[ 0 ], "display" );

	// We don't have any data stored on the element,
	// so use "detach" method as fast way to get rid of the element
	elem.detach();

	return display;
}

/**
 * Try to determine the default display value of an element
 * @param {String} nodeName
 */
function defaultDisplay( nodeName ) {
	var doc = document,
		display = elemdisplay[ nodeName ];

	if ( !display ) {
		display = actualDisplay( nodeName, doc );

		// If the simple way fails, read from inside an iframe
		if ( display === "none" || !display ) {

			// Use the already-created iframe if possible
			iframe = (iframe || jQuery( "<iframe frameborder='0' width='0' height='0'/>" )).appendTo( doc.documentElement );

			// Always write a new HTML skeleton so Webkit and Firefox don't choke on reuse
			doc = ( iframe[ 0 ].contentWindow || iframe[ 0 ].contentDocument ).document;

			// Support: IE
			doc.write();
			doc.close();

			display = actualDisplay( nodeName, doc );
			iframe.detach();
		}

		// Store the correct default display
		elemdisplay[ nodeName ] = display;
	}

	return display;
}


(function() {
	var a, shrinkWrapBlocksVal,
		div = document.createElement( "div" ),
		divReset =
			"-webkit-box-sizing:content-box;-moz-box-sizing:content-box;box-sizing:content-box;" +
			"display:block;padding:0;margin:0;border:0";

	// Setup
	div.innerHTML = "  <link/><table></table><a href='/a'>a</a><input type='checkbox'/>";
	a = div.getElementsByTagName( "a" )[ 0 ];

	a.style.cssText = "float:left;opacity:.5";

	// Make sure that element opacity exists
	// (IE uses filter instead)
	// Use a regex to work around a WebKit issue. See #5145
	support.opacity = /^0.5/.test( a.style.opacity );

	// Verify style float existence
	// (IE uses styleFloat instead of cssFloat)
	support.cssFloat = !!a.style.cssFloat;

	div.style.backgroundClip = "content-box";
	div.cloneNode( true ).style.backgroundClip = "";
	support.clearCloneStyle = div.style.backgroundClip === "content-box";

	// Null elements to avoid leaks in IE.
	a = div = null;

	support.shrinkWrapBlocks = function() {
		var body, container, div, containerStyles;

		if ( shrinkWrapBlocksVal == null ) {
			body = document.getElementsByTagName( "body" )[ 0 ];
			if ( !body ) {
				// Test fired too early or in an unsupported environment, exit.
				return;
			}

			containerStyles = "border:0;width:0;height:0;position:absolute;top:0;left:-9999px";
			container = document.createElement( "div" );
			div = document.createElement( "div" );

			body.appendChild( container ).appendChild( div );

			// Will be changed later if needed.
			shrinkWrapBlocksVal = false;

			if ( typeof div.style.zoom !== strundefined ) {
				// Support: IE6
				// Check if elements with layout shrink-wrap their children
				div.style.cssText = divReset + ";width:1px;padding:1px;zoom:1";
				div.innerHTML = "<div></div>";
				div.firstChild.style.width = "5px";
				shrinkWrapBlocksVal = div.offsetWidth !== 3;
			}

			body.removeChild( container );

			// Null elements to avoid leaks in IE.
			body = container = div = null;
		}

		return shrinkWrapBlocksVal;
	};

})();
var rmargin = (/^margin/);

var rnumnonpx = new RegExp( "^(" + pnum + ")(?!px)[a-z%]+$", "i" );


var getStyles, curCSS,
	rposition = /^(top|right|bottom|left)$/;

if ( window.getComputedStyle ) {
	getStyles = function( elem ) {
		return elem.ownerDocument.defaultView.getComputedStyle( elem, null );
	};

	curCSS = function( elem, name, computed ) {
		var width, minWidth, maxWidth, ret,
			style = elem.style;

		computed = computed || getStyles( elem );

		// getPropertyValue is only needed for .css('filter') in IE9, see #12537
		ret = computed ? computed.getPropertyValue( name ) || computed[ name ] : undefined;

		if ( computed ) {

			if ( ret === "" && !jQuery.contains( elem.ownerDocument, elem ) ) {
				ret = jQuery.style( elem, name );
			}

			// A tribute to the "awesome hack by Dean Edwards"
			// Chrome < 17 and Safari 5.0 uses "computed value" instead of "used value" for margin-right
			// Safari 5.1.7 (at least) returns percentage for a larger set of values, but width seems to be reliably pixels
			// this is against the CSSOM draft spec: http://dev.w3.org/csswg/cssom/#resolved-values
			if ( rnumnonpx.test( ret ) && rmargin.test( name ) ) {

				// Remember the original values
				width = style.width;
				minWidth = style.minWidth;
				maxWidth = style.maxWidth;

				// Put in the new values to get a computed value out
				style.minWidth = style.maxWidth = style.width = ret;
				ret = computed.width;

				// Revert the changed values
				style.width = width;
				style.minWidth = minWidth;
				style.maxWidth = maxWidth;
			}
		}

		// Support: IE
		// IE returns zIndex value as an integer.
		return ret === undefined ?
			ret :
			ret + "";
	};
} else if ( document.documentElement.currentStyle ) {
	getStyles = function( elem ) {
		return elem.currentStyle;
	};

	curCSS = function( elem, name, computed ) {
		var left, rs, rsLeft, ret,
			style = elem.style;

		computed = computed || getStyles( elem );
		ret = computed ? computed[ name ] : undefined;

		// Avoid setting ret to empty string here
		// so we don't default to auto
		if ( ret == null && style && style[ name ] ) {
			ret = style[ name ];
		}

		// From the awesome hack by Dean Edwards
		// http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291

		// If we're not dealing with a regular pixel number
		// but a number that has a weird ending, we need to convert it to pixels
		// but not position css attributes, as those are proportional to the parent element instead
		// and we can't measure the parent instead because it might trigger a "stacking dolls" problem
		if ( rnumnonpx.test( ret ) && !rposition.test( name ) ) {

			// Remember the original values
			left = style.left;
			rs = elem.runtimeStyle;
			rsLeft = rs && rs.left;

			// Put in the new values to get a computed value out
			if ( rsLeft ) {
				rs.left = elem.currentStyle.left;
			}
			style.left = name === "fontSize" ? "1em" : ret;
			ret = style.pixelLeft + "px";

			// Revert the changed values
			style.left = left;
			if ( rsLeft ) {
				rs.left = rsLeft;
			}
		}

		// Support: IE
		// IE returns zIndex value as an integer.
		return ret === undefined ?
			ret :
			ret + "" || "auto";
	};
}


function addGetHookIf( conditionFn, hookFn ) {
	// Define the hook, we'll check on the first run if it's really needed.
	return {
		get: function() {
			var condition = conditionFn();

			if ( condition == null ) {
				// The test was not ready at this point; screw the hook this time
				// but check again when needed next time.
				return;
			}

			if ( condition ) {
				// Hook not needed (or it's not possible to use it due to missing dependency),
				// remove it.
				// Since there are no other hooks for marginRight, remove the whole object.
				delete this.get;
				return;
			}

			// Hook needed; redefine it so that the support test is not executed again.

			return (this.get = hookFn).apply( this, arguments );
		}
	};
}


(function() {
	var a, reliableHiddenOffsetsVal, boxSizingVal, boxSizingReliableVal,
		pixelPositionVal, reliableMarginRightVal,
		div = document.createElement( "div" ),
		containerStyles = "border:0;width:0;height:0;position:absolute;top:0;left:-9999px",
		divReset =
			"-webkit-box-sizing:content-box;-moz-box-sizing:content-box;box-sizing:content-box;" +
			"display:block;padding:0;margin:0;border:0";

	// Setup
	div.innerHTML = "  <link/><table></table><a href='/a'>a</a><input type='checkbox'/>";
	a = div.getElementsByTagName( "a" )[ 0 ];

	a.style.cssText = "float:left;opacity:.5";

	// Make sure that element opacity exists
	// (IE uses filter instead)
	// Use a regex to work around a WebKit issue. See #5145
	support.opacity = /^0.5/.test( a.style.opacity );

	// Verify style float existence
	// (IE uses styleFloat instead of cssFloat)
	support.cssFloat = !!a.style.cssFloat;

	div.style.backgroundClip = "content-box";
	div.cloneNode( true ).style.backgroundClip = "";
	support.clearCloneStyle = div.style.backgroundClip === "content-box";

	// Null elements to avoid leaks in IE.
	a = div = null;

	jQuery.extend(support, {
		reliableHiddenOffsets: function() {
			if ( reliableHiddenOffsetsVal != null ) {
				return reliableHiddenOffsetsVal;
			}

			var container, tds, isSupported,
				div = document.createElement( "div" ),
				body = document.getElementsByTagName( "body" )[ 0 ];

			if ( !body ) {
				// Return for frameset docs that don't have a body
				return;
			}

			// Setup
			div.setAttribute( "className", "t" );
			div.innerHTML = "  <link/><table></table><a href='/a'>a</a><input type='checkbox'/>";

			container = document.createElement( "div" );
			container.style.cssText = containerStyles;

			body.appendChild( container ).appendChild( div );

			// Support: IE8
			// Check if table cells still have offsetWidth/Height when they are set
			// to display:none and there are still other visible table cells in a
			// table row; if so, offsetWidth/Height are not reliable for use when
			// determining if an element has been hidden directly using
			// display:none (it is still safe to use offsets if a parent element is
			// hidden; don safety goggles and see bug #4512 for more information).
			div.innerHTML = "<table><tr><td></td><td>t</td></tr></table>";
			tds = div.getElementsByTagName( "td" );
			tds[ 0 ].style.cssText = "padding:0;margin:0;border:0;display:none";
			isSupported = ( tds[ 0 ].offsetHeight === 0 );

			tds[ 0 ].style.display = "";
			tds[ 1 ].style.display = "none";

			// Support: IE8
			// Check if empty table cells still have offsetWidth/Height
			reliableHiddenOffsetsVal = isSupported && ( tds[ 0 ].offsetHeight === 0 );

			body.removeChild( container );

			// Null elements to avoid leaks in IE.
			div = body = null;

			return reliableHiddenOffsetsVal;
		},

		boxSizing: function() {
			if ( boxSizingVal == null ) {
				computeStyleTests();
			}
			return boxSizingVal;
		},

		boxSizingReliable: function() {
			if ( boxSizingReliableVal == null ) {
				computeStyleTests();
			}
			return boxSizingReliableVal;
		},

		pixelPosition: function() {
			if ( pixelPositionVal == null ) {
				computeStyleTests();
			}
			return pixelPositionVal;
		},

		reliableMarginRight: function() {
			var body, container, div, marginDiv;

			// Use window.getComputedStyle because jsdom on node.js will break without it.
			if ( reliableMarginRightVal == null && window.getComputedStyle ) {
				body = document.getElementsByTagName( "body" )[ 0 ];
				if ( !body ) {
					// Test fired too early or in an unsupported environment, exit.
					return;
				}

				container = document.createElement( "div" );
				div = document.createElement( "div" );
				container.style.cssText = containerStyles;

				body.appendChild( container ).appendChild( div );

				// Check if div with explicit width and no margin-right incorrectly
				// gets computed margin-right based on width of container. (#3333)
				// Fails in WebKit before Feb 2011 nightlies
				// WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
				marginDiv = div.appendChild( document.createElement( "div" ) );
				marginDiv.style.cssText = div.style.cssText = divReset;
				marginDiv.style.marginRight = marginDiv.style.width = "0";
				div.style.width = "1px";

				reliableMarginRightVal =
					!parseFloat( ( window.getComputedStyle( marginDiv, null ) || {} ).marginRight );

				body.removeChild( container );
			}

			return reliableMarginRightVal;
		}
	});

	function computeStyleTests() {
		var container, div,
			body = document.getElementsByTagName( "body" )[ 0 ];

		if ( !body ) {
			// Test fired too early or in an unsupported environment, exit.
			return;
		}

		container = document.createElement( "div" );
		div = document.createElement( "div" );
		container.style.cssText = containerStyles;

		body.appendChild( container ).appendChild( div );

		div.style.cssText =
			"-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;" +
				"position:absolute;display:block;padding:1px;border:1px;width:4px;" +
				"margin-top:1%;top:1%";

		// Workaround failing boxSizing test due to offsetWidth returning wrong value
		// with some non-1 values of body zoom, ticket #13543
		jQuery.swap( body, body.style.zoom != null ? { zoom: 1 } : {}, function() {
			boxSizingVal = div.offsetWidth === 4;
		});

		// Will be changed later if needed.
		boxSizingReliableVal = true;
		pixelPositionVal = false;
		reliableMarginRightVal = true;

		// Use window.getComputedStyle because jsdom on node.js will break without it.
		if ( window.getComputedStyle ) {
			pixelPositionVal = ( window.getComputedStyle( div, null ) || {} ).top !== "1%";
			boxSizingReliableVal =
				( window.getComputedStyle( div, null ) || { width: "4px" } ).width === "4px";
		}

		body.removeChild( container );

		// Null elements to avoid leaks in IE.
		div = body = null;
	}

})();


// A method for quickly swapping in/out CSS properties to get correct calculations.
jQuery.swap = function( elem, options, callback, args ) {
	var ret, name,
		old = {};

	// Remember the old values, and insert the new ones
	for ( name in options ) {
		old[ name ] = elem.style[ name ];
		elem.style[ name ] = options[ name ];
	}

	ret = callback.apply( elem, args || [] );

	// Revert the old values
	for ( name in options ) {
		elem.style[ name ] = old[ name ];
	}

	return ret;
};


var
		ralpha = /alpha\([^)]*\)/i,
	ropacity = /opacity\s*=\s*([^)]*)/,

	// swappable if display is none or starts with table except "table", "table-cell", or "table-caption"
	// see here for display values: https://developer.mozilla.org/en-US/docs/CSS/display
	rdisplayswap = /^(none|table(?!-c[ea]).+)/,
	rnumsplit = new RegExp( "^(" + pnum + ")(.*)$", "i" ),
	rrelNum = new RegExp( "^([+-])=(" + pnum + ")", "i" ),

	cssShow = { position: "absolute", visibility: "hidden", display: "block" },
	cssNormalTransform = {
		letterSpacing: 0,
		fontWeight: 400
	},

	cssPrefixes = [ "Webkit", "O", "Moz", "ms" ];


// return a css property mapped to a potentially vendor prefixed property
function vendorPropName( style, name ) {

	// shortcut for names that are not vendor prefixed
	if ( name in style ) {
		return name;
	}

	// check for vendor prefixed names
	var capName = name.charAt(0).toUpperCase() + name.slice(1),
		origName = name,
		i = cssPrefixes.length;

	while ( i-- ) {
		name = cssPrefixes[ i ] + capName;
		if ( name in style ) {
			return name;
		}
	}

	return origName;
}

function showHide( elements, show ) {
	var display, elem, hidden,
		values = [],
		index = 0,
		length = elements.length;

	for ( ; index < length; index++ ) {
		elem = elements[ index ];
		if ( !elem.style ) {
			continue;
		}

		values[ index ] = jQuery._data( elem, "olddisplay" );
		display = elem.style.display;
		if ( show ) {
			// Reset the inline display of this element to learn if it is
			// being hidden by cascaded rules or not
			if ( !values[ index ] && display === "none" ) {
				elem.style.display = "";
			}

			// Set elements which have been overridden with display: none
			// in a stylesheet to whatever the default browser style is
			// for such an element
			if ( elem.style.display === "" && isHidden( elem ) ) {
				values[ index ] = jQuery._data( elem, "olddisplay", defaultDisplay(elem.nodeName) );
			}
		} else {

			if ( !values[ index ] ) {
				hidden = isHidden( elem );

				if ( display && display !== "none" || !hidden ) {
					jQuery._data( elem, "olddisplay", hidden ? display : jQuery.css( elem, "display" ) );
				}
			}
		}
	}

	// Set the display of most of the elements in a second loop
	// to avoid the constant reflow
	for ( index = 0; index < length; index++ ) {
		elem = elements[ index ];
		if ( !elem.style ) {
			continue;
		}
		if ( !show || elem.style.display === "none" || elem.style.display === "" ) {
			elem.style.display = show ? values[ index ] || "" : "none";
		}
	}

	return elements;
}

function setPositiveNumber( elem, value, subtract ) {
	var matches = rnumsplit.exec( value );
	return matches ?
		// Guard against undefined "subtract", e.g., when used as in cssHooks
		Math.max( 0, matches[ 1 ] - ( subtract || 0 ) ) + ( matches[ 2 ] || "px" ) :
		value;
}

function augmentWidthOrHeight( elem, name, extra, isBorderBox, styles ) {
	var i = extra === ( isBorderBox ? "border" : "content" ) ?
		// If we already have the right measurement, avoid augmentation
		4 :
		// Otherwise initialize for horizontal or vertical properties
		name === "width" ? 1 : 0,

		val = 0;

	for ( ; i < 4; i += 2 ) {
		// both box models exclude margin, so add it if we want it
		if ( extra === "margin" ) {
			val += jQuery.css( elem, extra + cssExpand[ i ], true, styles );
		}

		if ( isBorderBox ) {
			// border-box includes padding, so remove it if we want content
			if ( extra === "content" ) {
				val -= jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );
			}

			// at this point, extra isn't border nor margin, so remove border
			if ( extra !== "margin" ) {
				val -= jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
			}
		} else {
			// at this point, extra isn't content, so add padding
			val += jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );

			// at this point, extra isn't content nor padding, so add border
			if ( extra !== "padding" ) {
				val += jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
			}
		}
	}

	return val;
}

function getWidthOrHeight( elem, name, extra ) {

	// Start with offset property, which is equivalent to the border-box value
	var valueIsBorderBox = true,
		val = name === "width" ? elem.offsetWidth : elem.offsetHeight,
		styles = getStyles( elem ),
		isBorderBox = support.boxSizing() && jQuery.css( elem, "boxSizing", false, styles ) === "border-box";

	// some non-html elements return undefined for offsetWidth, so check for null/undefined
	// svg - https://bugzilla.mozilla.org/show_bug.cgi?id=649285
	// MathML - https://bugzilla.mozilla.org/show_bug.cgi?id=491668
	if ( val <= 0 || val == null ) {
		// Fall back to computed then uncomputed css if necessary
		val = curCSS( elem, name, styles );
		if ( val < 0 || val == null ) {
			val = elem.style[ name ];
		}

		// Computed unit is not pixels. Stop here and return.
		if ( rnumnonpx.test(val) ) {
			return val;
		}

		// we need the check for style in case a browser which returns unreliable values
		// for getComputedStyle silently falls back to the reliable elem.style
		valueIsBorderBox = isBorderBox && ( support.boxSizingReliable() || val === elem.style[ name ] );

		// Normalize "", auto, and prepare for extra
		val = parseFloat( val ) || 0;
	}

	// use the active box-sizing model to add/subtract irrelevant styles
	return ( val +
		augmentWidthOrHeight(
			elem,
			name,
			extra || ( isBorderBox ? "border" : "content" ),
			valueIsBorderBox,
			styles
		)
	) + "px";
}

jQuery.extend({
	// Add in style property hooks for overriding the default
	// behavior of getting and setting a style property
	cssHooks: {
		opacity: {
			get: function( elem, computed ) {
				if ( computed ) {
					// We should always get a number back from opacity
					var ret = curCSS( elem, "opacity" );
					return ret === "" ? "1" : ret;
				}
			}
		}
	},

	// Don't automatically add "px" to these possibly-unitless properties
	cssNumber: {
		"columnCount": true,
		"fillOpacity": true,
		"fontWeight": true,
		"lineHeight": true,
		"opacity": true,
		"order": true,
		"orphans": true,
		"widows": true,
		"zIndex": true,
		"zoom": true
	},

	// Add in properties whose names you wish to fix before
	// setting or getting the value
	cssProps: {
		// normalize float css property
		"float": support.cssFloat ? "cssFloat" : "styleFloat"
	},

	// Get and set the style property on a DOM Node
	style: function( elem, name, value, extra ) {
		// Don't set styles on text and comment nodes
		if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style ) {
			return;
		}

		// Make sure that we're working with the right name
		var ret, type, hooks,
			origName = jQuery.camelCase( name ),
			style = elem.style;

		name = jQuery.cssProps[ origName ] || ( jQuery.cssProps[ origName ] = vendorPropName( style, origName ) );

		// gets hook for the prefixed version
		// followed by the unprefixed version
		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];

		// Check if we're setting a value
		if ( value !== undefined ) {
			type = typeof value;

			// convert relative number strings (+= or -=) to relative numbers. #7345
			if ( type === "string" && (ret = rrelNum.exec( value )) ) {
				value = ( ret[1] + 1 ) * ret[2] + parseFloat( jQuery.css( elem, name ) );
				// Fixes bug #9237
				type = "number";
			}

			// Make sure that null and NaN values aren't set. See: #7116
			if ( value == null || value !== value ) {
				return;
			}

			// If a number was passed in, add 'px' to the (except for certain CSS properties)
			if ( type === "number" && !jQuery.cssNumber[ origName ] ) {
				value += "px";
			}

			// Fixes #8908, it can be done more correctly by specifing setters in cssHooks,
			// but it would mean to define eight (for every problematic property) identical functions
			if ( !support.clearCloneStyle && value === "" && name.indexOf("background") === 0 ) {
				style[ name ] = "inherit";
			}

			// If a hook was provided, use that value, otherwise just set the specified value
			if ( !hooks || !("set" in hooks) || (value = hooks.set( elem, value, extra )) !== undefined ) {

				// Support: IE
				// Swallow errors from 'invalid' CSS values (#5509)
				try {
					// Support: Chrome, Safari
					// Setting style to blank string required to delete "style: x !important;"
					style[ name ] = "";
					style[ name ] = value;
				} catch(e) {}
			}

		} else {
			// If a hook was provided get the non-computed value from there
			if ( hooks && "get" in hooks && (ret = hooks.get( elem, false, extra )) !== undefined ) {
				return ret;
			}

			// Otherwise just get the value from the style object
			return style[ name ];
		}
	},

	css: function( elem, name, extra, styles ) {
		var num, val, hooks,
			origName = jQuery.camelCase( name );

		// Make sure that we're working with the right name
		name = jQuery.cssProps[ origName ] || ( jQuery.cssProps[ origName ] = vendorPropName( elem.style, origName ) );

		// gets hook for the prefixed version
		// followed by the unprefixed version
		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];

		// If a hook was provided get the computed value from there
		if ( hooks && "get" in hooks ) {
			val = hooks.get( elem, true, extra );
		}

		// Otherwise, if a way to get the computed value exists, use that
		if ( val === undefined ) {
			val = curCSS( elem, name, styles );
		}

		//convert "normal" to computed value
		if ( val === "normal" && name in cssNormalTransform ) {
			val = cssNormalTransform[ name ];
		}

		// Return, converting to number if forced or a qualifier was provided and val looks numeric
		if ( extra === "" || extra ) {
			num = parseFloat( val );
			return extra === true || jQuery.isNumeric( num ) ? num || 0 : val;
		}
		return val;
	}
});

jQuery.each([ "height", "width" ], function( i, name ) {
	jQuery.cssHooks[ name ] = {
		get: function( elem, computed, extra ) {
			if ( computed ) {
				// certain elements can have dimension info if we invisibly show them
				// however, it must have a current display style that would benefit from this
				return elem.offsetWidth === 0 && rdisplayswap.test( jQuery.css( elem, "display" ) ) ?
					jQuery.swap( elem, cssShow, function() {
						return getWidthOrHeight( elem, name, extra );
					}) :
					getWidthOrHeight( elem, name, extra );
			}
		},

		set: function( elem, value, extra ) {
			var styles = extra && getStyles( elem );
			return setPositiveNumber( elem, value, extra ?
				augmentWidthOrHeight(
					elem,
					name,
					extra,
					support.boxSizing() && jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
					styles
				) : 0
			);
		}
	};
});

if ( !support.opacity ) {
	jQuery.cssHooks.opacity = {
		get: function( elem, computed ) {
			// IE uses filters for opacity
			return ropacity.test( (computed && elem.currentStyle ? elem.currentStyle.filter : elem.style.filter) || "" ) ?
				( 0.01 * parseFloat( RegExp.$1 ) ) + "" :
				computed ? "1" : "";
		},

		set: function( elem, value ) {
			var style = elem.style,
				currentStyle = elem.currentStyle,
				opacity = jQuery.isNumeric( value ) ? "alpha(opacity=" + value * 100 + ")" : "",
				filter = currentStyle && currentStyle.filter || style.filter || "";

			// IE has trouble with opacity if it does not have layout
			// Force it by setting the zoom level
			style.zoom = 1;

			// if setting opacity to 1, and no other filters exist - attempt to remove filter attribute #6652
			// if value === "", then remove inline opacity #12685
			if ( ( value >= 1 || value === "" ) &&
					jQuery.trim( filter.replace( ralpha, "" ) ) === "" &&
					style.removeAttribute ) {

				// Setting style.filter to null, "" & " " still leave "filter:" in the cssText
				// if "filter:" is present at all, clearType is disabled, we want to avoid this
				// style.removeAttribute is IE Only, but so apparently is this code path...
				style.removeAttribute( "filter" );

				// if there is no filter style applied in a css rule or unset inline opacity, we are done
				if ( value === "" || currentStyle && !currentStyle.filter ) {
					return;
				}
			}

			// otherwise, set new filter values
			style.filter = ralpha.test( filter ) ?
				filter.replace( ralpha, opacity ) :
				filter + " " + opacity;
		}
	};
}

jQuery.cssHooks.marginRight = addGetHookIf( support.reliableMarginRight,
	function( elem, computed ) {
		if ( computed ) {
			// WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
			// Work around by temporarily setting element display to inline-block
			return jQuery.swap( elem, { "display": "inline-block" },
				curCSS, [ elem, "marginRight" ] );
		}
	}
);

// These hooks are used by animate to expand properties
jQuery.each({
	margin: "",
	padding: "",
	border: "Width"
}, function( prefix, suffix ) {
	jQuery.cssHooks[ prefix + suffix ] = {
		expand: function( value ) {
			var i = 0,
				expanded = {},

				// assumes a single number if not a string
				parts = typeof value === "string" ? value.split(" ") : [ value ];

			for ( ; i < 4; i++ ) {
				expanded[ prefix + cssExpand[ i ] + suffix ] =
					parts[ i ] || parts[ i - 2 ] || parts[ 0 ];
			}

			return expanded;
		}
	};

	if ( !rmargin.test( prefix ) ) {
		jQuery.cssHooks[ prefix + suffix ].set = setPositiveNumber;
	}
});

jQuery.fn.extend({
	css: function( name, value ) {
		return access( this, function( elem, name, value ) {
			var styles, len,
				map = {},
				i = 0;

			if ( jQuery.isArray( name ) ) {
				styles = getStyles( elem );
				len = name.length;

				for ( ; i < len; i++ ) {
					map[ name[ i ] ] = jQuery.css( elem, name[ i ], false, styles );
				}

				return map;
			}

			return value !== undefined ?
				jQuery.style( elem, name, value ) :
				jQuery.css( elem, name );
		}, name, value, arguments.length > 1 );
	},
	show: function() {
		return showHide( this, true );
	},
	hide: function() {
		return showHide( this );
	},
	toggle: function( state ) {
		if ( typeof state === "boolean" ) {
			return state ? this.show() : this.hide();
		}

		return this.each(function() {
			if ( isHidden( this ) ) {
				jQuery( this ).show();
			} else {
				jQuery( this ).hide();
			}
		});
	}
});


function Tween( elem, options, prop, end, easing ) {
	return new Tween.prototype.init( elem, options, prop, end, easing );
}
jQuery.Tween = Tween;

Tween.prototype = {
	constructor: Tween,
	init: function( elem, options, prop, end, easing, unit ) {
		this.elem = elem;
		this.prop = prop;
		this.easing = easing || "swing";
		this.options = options;
		this.start = this.now = this.cur();
		this.end = end;
		this.unit = unit || ( jQuery.cssNumber[ prop ] ? "" : "px" );
	},
	cur: function() {
		var hooks = Tween.propHooks[ this.prop ];

		return hooks && hooks.get ?
			hooks.get( this ) :
			Tween.propHooks._default.get( this );
	},
	run: function( percent ) {
		var eased,
			hooks = Tween.propHooks[ this.prop ];

		if ( this.options.duration ) {
			this.pos = eased = jQuery.easing[ this.easing ](
				percent, this.options.duration * percent, 0, 1, this.options.duration
			);
		} else {
			this.pos = eased = percent;
		}
		this.now = ( this.end - this.start ) * eased + this.start;

		if ( this.options.step ) {
			this.options.step.call( this.elem, this.now, this );
		}

		if ( hooks && hooks.set ) {
			hooks.set( this );
		} else {
			Tween.propHooks._default.set( this );
		}
		return this;
	}
};

Tween.prototype.init.prototype = Tween.prototype;

Tween.propHooks = {
	_default: {
		get: function( tween ) {
			var result;

			if ( tween.elem[ tween.prop ] != null &&
				(!tween.elem.style || tween.elem.style[ tween.prop ] == null) ) {
				return tween.elem[ tween.prop ];
			}

			// passing an empty string as a 3rd parameter to .css will automatically
			// attempt a parseFloat and fallback to a string if the parse fails
			// so, simple values such as "10px" are parsed to Float.
			// complex values such as "rotate(1rad)" are returned as is.
			result = jQuery.css( tween.elem, tween.prop, "" );
			// Empty strings, null, undefined and "auto" are converted to 0.
			return !result || result === "auto" ? 0 : result;
		},
		set: function( tween ) {
			// use step hook for back compat - use cssHook if its there - use .style if its
			// available and use plain properties where available
			if ( jQuery.fx.step[ tween.prop ] ) {
				jQuery.fx.step[ tween.prop ]( tween );
			} else if ( tween.elem.style && ( tween.elem.style[ jQuery.cssProps[ tween.prop ] ] != null || jQuery.cssHooks[ tween.prop ] ) ) {
				jQuery.style( tween.elem, tween.prop, tween.now + tween.unit );
			} else {
				tween.elem[ tween.prop ] = tween.now;
			}
		}
	}
};

// Support: IE <=9
// Panic based approach to setting things on disconnected nodes

Tween.propHooks.scrollTop = Tween.propHooks.scrollLeft = {
	set: function( tween ) {
		if ( tween.elem.nodeType && tween.elem.parentNode ) {
			tween.elem[ tween.prop ] = tween.now;
		}
	}
};

jQuery.easing = {
	linear: function( p ) {
		return p;
	},
	swing: function( p ) {
		return 0.5 - Math.cos( p * Math.PI ) / 2;
	}
};

jQuery.fx = Tween.prototype.init;

// Back Compat <1.8 extension point
jQuery.fx.step = {};


var
	fxNow, timerId,
	rfxtypes = /^(?:toggle|show|hide)$/,
	rfxnum = new RegExp( "^(?:([+-])=|)(" + pnum + ")([a-z%]*)$", "i" ),
	rrun = /queueHooks$/,
	animationPrefilters = [ defaultPrefilter ],
	tweeners = {
		"*": [ function( prop, value ) {
			var tween = this.createTween( prop, value ),
				target = tween.cur(),
				parts = rfxnum.exec( value ),
				unit = parts && parts[ 3 ] || ( jQuery.cssNumber[ prop ] ? "" : "px" ),

				// Starting value computation is required for potential unit mismatches
				start = ( jQuery.cssNumber[ prop ] || unit !== "px" && +target ) &&
					rfxnum.exec( jQuery.css( tween.elem, prop ) ),
				scale = 1,
				maxIterations = 20;

			if ( start && start[ 3 ] !== unit ) {
				// Trust units reported by jQuery.css
				unit = unit || start[ 3 ];

				// Make sure we update the tween properties later on
				parts = parts || [];

				// Iteratively approximate from a nonzero starting point
				start = +target || 1;

				do {
					// If previous iteration zeroed out, double until we get *something*
					// Use a string for doubling factor so we don't accidentally see scale as unchanged below
					scale = scale || ".5";

					// Adjust and apply
					start = start / scale;
					jQuery.style( tween.elem, prop, start + unit );

				// Update scale, tolerating zero or NaN from tween.cur()
				// And breaking the loop if scale is unchanged or perfect, or if we've just had enough
				} while ( scale !== (scale = tween.cur() / target) && scale !== 1 && --maxIterations );
			}

			// Update tween properties
			if ( parts ) {
				start = tween.start = +start || +target || 0;
				tween.unit = unit;
				// If a +=/-= token was provided, we're doing a relative animation
				tween.end = parts[ 1 ] ?
					start + ( parts[ 1 ] + 1 ) * parts[ 2 ] :
					+parts[ 2 ];
			}

			return tween;
		} ]
	};

// Animations created synchronously will run synchronously
function createFxNow() {
	setTimeout(function() {
		fxNow = undefined;
	});
	return ( fxNow = jQuery.now() );
}

// Generate parameters to create a standard animation
function genFx( type, includeWidth ) {
	var which,
		attrs = { height: type },
		i = 0;

	// if we include width, step value is 1 to do all cssExpand values,
	// if we don't include width, step value is 2 to skip over Left and Right
	includeWidth = includeWidth ? 1 : 0;
	for ( ; i < 4 ; i += 2 - includeWidth ) {
		which = cssExpand[ i ];
		attrs[ "margin" + which ] = attrs[ "padding" + which ] = type;
	}

	if ( includeWidth ) {
		attrs.opacity = attrs.width = type;
	}

	return attrs;
}

function createTween( value, prop, animation ) {
	var tween,
		collection = ( tweeners[ prop ] || [] ).concat( tweeners[ "*" ] ),
		index = 0,
		length = collection.length;
	for ( ; index < length; index++ ) {
		if ( (tween = collection[ index ].call( animation, prop, value )) ) {

			// we're done with this property
			return tween;
		}
	}
}

function defaultPrefilter( elem, props, opts ) {
	/* jshint validthis: true */
	var prop, value, toggle, tween, hooks, oldfire, display, dDisplay,
		anim = this,
		orig = {},
		style = elem.style,
		hidden = elem.nodeType && isHidden( elem ),
		dataShow = jQuery._data( elem, "fxshow" );

	// handle queue: false promises
	if ( !opts.queue ) {
		hooks = jQuery._queueHooks( elem, "fx" );
		if ( hooks.unqueued == null ) {
			hooks.unqueued = 0;
			oldfire = hooks.empty.fire;
			hooks.empty.fire = function() {
				if ( !hooks.unqueued ) {
					oldfire();
				}
			};
		}
		hooks.unqueued++;

		anim.always(function() {
			// doing this makes sure that the complete handler will be called
			// before this completes
			anim.always(function() {
				hooks.unqueued--;
				if ( !jQuery.queue( elem, "fx" ).length ) {
					hooks.empty.fire();
				}
			});
		});
	}

	// height/width overflow pass
	if ( elem.nodeType === 1 && ( "height" in props || "width" in props ) ) {
		// Make sure that nothing sneaks out
		// Record all 3 overflow attributes because IE does not
		// change the overflow attribute when overflowX and
		// overflowY are set to the same value
		opts.overflow = [ style.overflow, style.overflowX, style.overflowY ];

		// Set display property to inline-block for height/width
		// animations on inline elements that are having width/height animated
		display = jQuery.css( elem, "display" );
		dDisplay = defaultDisplay( elem.nodeName );
		if ( display === "none" ) {
			display = dDisplay;
		}
		if ( display === "inline" &&
				jQuery.css( elem, "float" ) === "none" ) {

			// inline-level elements accept inline-block;
			// block-level elements need to be inline with layout
			if ( !support.inlineBlockNeedsLayout || dDisplay === "inline" ) {
				style.display = "inline-block";
			} else {
				style.zoom = 1;
			}
		}
	}

	if ( opts.overflow ) {
		style.overflow = "hidden";
		if ( !support.shrinkWrapBlocks() ) {
			anim.always(function() {
				style.overflow = opts.overflow[ 0 ];
				style.overflowX = opts.overflow[ 1 ];
				style.overflowY = opts.overflow[ 2 ];
			});
		}
	}

	// show/hide pass
	for ( prop in props ) {
		value = props[ prop ];
		if ( rfxtypes.exec( value ) ) {
			delete props[ prop ];
			toggle = toggle || value === "toggle";
			if ( value === ( hidden ? "hide" : "show" ) ) {

				// If there is dataShow left over from a stopped hide or show and we are going to proceed with show, we should pretend to be hidden
				if ( value === "show" && dataShow && dataShow[ prop ] !== undefined ) {
					hidden = true;
				} else {
					continue;
				}
			}
			orig[ prop ] = dataShow && dataShow[ prop ] || jQuery.style( elem, prop );
		}
	}

	if ( !jQuery.isEmptyObject( orig ) ) {
		if ( dataShow ) {
			if ( "hidden" in dataShow ) {
				hidden = dataShow.hidden;
			}
		} else {
			dataShow = jQuery._data( elem, "fxshow", {} );
		}

		// store state if its toggle - enables .stop().toggle() to "reverse"
		if ( toggle ) {
			dataShow.hidden = !hidden;
		}
		if ( hidden ) {
			jQuery( elem ).show();
		} else {
			anim.done(function() {
				jQuery( elem ).hide();
			});
		}
		anim.done(function() {
			var prop;
			jQuery._removeData( elem, "fxshow" );
			for ( prop in orig ) {
				jQuery.style( elem, prop, orig[ prop ] );
			}
		});
		for ( prop in orig ) {
			tween = createTween( hidden ? dataShow[ prop ] : 0, prop, anim );

			if ( !( prop in dataShow ) ) {
				dataShow[ prop ] = tween.start;
				if ( hidden ) {
					tween.end = tween.start;
					tween.start = prop === "width" || prop === "height" ? 1 : 0;
				}
			}
		}
	}
}

function propFilter( props, specialEasing ) {
	var index, name, easing, value, hooks;

	// camelCase, specialEasing and expand cssHook pass
	for ( index in props ) {
		name = jQuery.camelCase( index );
		easing = specialEasing[ name ];
		value = props[ index ];
		if ( jQuery.isArray( value ) ) {
			easing = value[ 1 ];
			value = props[ index ] = value[ 0 ];
		}

		if ( index !== name ) {
			props[ name ] = value;
			delete props[ index ];
		}

		hooks = jQuery.cssHooks[ name ];
		if ( hooks && "expand" in hooks ) {
			value = hooks.expand( value );
			delete props[ name ];

			// not quite $.extend, this wont overwrite keys already present.
			// also - reusing 'index' from above because we have the correct "name"
			for ( index in value ) {
				if ( !( index in props ) ) {
					props[ index ] = value[ index ];
					specialEasing[ index ] = easing;
				}
			}
		} else {
			specialEasing[ name ] = easing;
		}
	}
}

function Animation( elem, properties, options ) {
	var result,
		stopped,
		index = 0,
		length = animationPrefilters.length,
		deferred = jQuery.Deferred().always( function() {
			// don't match elem in the :animated selector
			delete tick.elem;
		}),
		tick = function() {
			if ( stopped ) {
				return false;
			}
			var currentTime = fxNow || createFxNow(),
				remaining = Math.max( 0, animation.startTime + animation.duration - currentTime ),
				// archaic crash bug won't allow us to use 1 - ( 0.5 || 0 ) (#12497)
				temp = remaining / animation.duration || 0,
				percent = 1 - temp,
				index = 0,
				length = animation.tweens.length;

			for ( ; index < length ; index++ ) {
				animation.tweens[ index ].run( percent );
			}

			deferred.notifyWith( elem, [ animation, percent, remaining ]);

			if ( percent < 1 && length ) {
				return remaining;
			} else {
				deferred.resolveWith( elem, [ animation ] );
				return false;
			}
		},
		animation = deferred.promise({
			elem: elem,
			props: jQuery.extend( {}, properties ),
			opts: jQuery.extend( true, { specialEasing: {} }, options ),
			originalProperties: properties,
			originalOptions: options,
			startTime: fxNow || createFxNow(),
			duration: options.duration,
			tweens: [],
			createTween: function( prop, end ) {
				var tween = jQuery.Tween( elem, animation.opts, prop, end,
						animation.opts.specialEasing[ prop ] || animation.opts.easing );
				animation.tweens.push( tween );
				return tween;
			},
			stop: function( gotoEnd ) {
				var index = 0,
					// if we are going to the end, we want to run all the tweens
					// otherwise we skip this part
					length = gotoEnd ? animation.tweens.length : 0;
				if ( stopped ) {
					return this;
				}
				stopped = true;
				for ( ; index < length ; index++ ) {
					animation.tweens[ index ].run( 1 );
				}

				// resolve when we played the last frame
				// otherwise, reject
				if ( gotoEnd ) {
					deferred.resolveWith( elem, [ animation, gotoEnd ] );
				} else {
					deferred.rejectWith( elem, [ animation, gotoEnd ] );
				}
				return this;
			}
		}),
		props = animation.props;

	propFilter( props, animation.opts.specialEasing );

	for ( ; index < length ; index++ ) {
		result = animationPrefilters[ index ].call( animation, elem, props, animation.opts );
		if ( result ) {
			return result;
		}
	}

	jQuery.map( props, createTween, animation );

	if ( jQuery.isFunction( animation.opts.start ) ) {
		animation.opts.start.call( elem, animation );
	}

	jQuery.fx.timer(
		jQuery.extend( tick, {
			elem: elem,
			anim: animation,
			queue: animation.opts.queue
		})
	);

	// attach callbacks from options
	return animation.progress( animation.opts.progress )
		.done( animation.opts.done, animation.opts.complete )
		.fail( animation.opts.fail )
		.always( animation.opts.always );
}

jQuery.Animation = jQuery.extend( Animation, {
	tweener: function( props, callback ) {
		if ( jQuery.isFunction( props ) ) {
			callback = props;
			props = [ "*" ];
		} else {
			props = props.split(" ");
		}

		var prop,
			index = 0,
			length = props.length;

		for ( ; index < length ; index++ ) {
			prop = props[ index ];
			tweeners[ prop ] = tweeners[ prop ] || [];
			tweeners[ prop ].unshift( callback );
		}
	},

	prefilter: function( callback, prepend ) {
		if ( prepend ) {
			animationPrefilters.unshift( callback );
		} else {
			animationPrefilters.push( callback );
		}
	}
});

jQuery.speed = function( speed, easing, fn ) {
	var opt = speed && typeof speed === "object" ? jQuery.extend( {}, speed ) : {
		complete: fn || !fn && easing ||
			jQuery.isFunction( speed ) && speed,
		duration: speed,
		easing: fn && easing || easing && !jQuery.isFunction( easing ) && easing
	};

	opt.duration = jQuery.fx.off ? 0 : typeof opt.duration === "number" ? opt.duration :
		opt.duration in jQuery.fx.speeds ? jQuery.fx.speeds[ opt.duration ] : jQuery.fx.speeds._default;

	// normalize opt.queue - true/undefined/null -> "fx"
	if ( opt.queue == null || opt.queue === true ) {
		opt.queue = "fx";
	}

	// Queueing
	opt.old = opt.complete;

	opt.complete = function() {
		if ( jQuery.isFunction( opt.old ) ) {
			opt.old.call( this );
		}

		if ( opt.queue ) {
			jQuery.dequeue( this, opt.queue );
		}
	};

	return opt;
};

jQuery.fn.extend({
	fadeTo: function( speed, to, easing, callback ) {

		// show any hidden elements after setting opacity to 0
		return this.filter( isHidden ).css( "opacity", 0 ).show()

			// animate to the value specified
			.end().animate({ opacity: to }, speed, easing, callback );
	},
	animate: function( prop, speed, easing, callback ) {
		var empty = jQuery.isEmptyObject( prop ),
			optall = jQuery.speed( speed, easing, callback ),
			doAnimation = function() {
				// Operate on a copy of prop so per-property easing won't be lost
				var anim = Animation( this, jQuery.extend( {}, prop ), optall );

				// Empty animations, or finishing resolves immediately
				if ( empty || jQuery._data( this, "finish" ) ) {
					anim.stop( true );
				}
			};
			doAnimation.finish = doAnimation;

		return empty || optall.queue === false ?
			this.each( doAnimation ) :
			this.queue( optall.queue, doAnimation );
	},
	stop: function( type, clearQueue, gotoEnd ) {
		var stopQueue = function( hooks ) {
			var stop = hooks.stop;
			delete hooks.stop;
			stop( gotoEnd );
		};

		if ( typeof type !== "string" ) {
			gotoEnd = clearQueue;
			clearQueue = type;
			type = undefined;
		}
		if ( clearQueue && type !== false ) {
			this.queue( type || "fx", [] );
		}

		return this.each(function() {
			var dequeue = true,
				index = type != null && type + "queueHooks",
				timers = jQuery.timers,
				data = jQuery._data( this );

			if ( index ) {
				if ( data[ index ] && data[ index ].stop ) {
					stopQueue( data[ index ] );
				}
			} else {
				for ( index in data ) {
					if ( data[ index ] && data[ index ].stop && rrun.test( index ) ) {
						stopQueue( data[ index ] );
					}
				}
			}

			for ( index = timers.length; index--; ) {
				if ( timers[ index ].elem === this && (type == null || timers[ index ].queue === type) ) {
					timers[ index ].anim.stop( gotoEnd );
					dequeue = false;
					timers.splice( index, 1 );
				}
			}

			// start the next in the queue if the last step wasn't forced
			// timers currently will call their complete callbacks, which will dequeue
			// but only if they were gotoEnd
			if ( dequeue || !gotoEnd ) {
				jQuery.dequeue( this, type );
			}
		});
	},
	finish: function( type ) {
		if ( type !== false ) {
			type = type || "fx";
		}
		return this.each(function() {
			var index,
				data = jQuery._data( this ),
				queue = data[ type + "queue" ],
				hooks = data[ type + "queueHooks" ],
				timers = jQuery.timers,
				length = queue ? queue.length : 0;

			// enable finishing flag on private data
			data.finish = true;

			// empty the queue first
			jQuery.queue( this, type, [] );

			if ( hooks && hooks.stop ) {
				hooks.stop.call( this, true );
			}

			// look for any active animations, and finish them
			for ( index = timers.length; index--; ) {
				if ( timers[ index ].elem === this && timers[ index ].queue === type ) {
					timers[ index ].anim.stop( true );
					timers.splice( index, 1 );
				}
			}

			// look for any animations in the old queue and finish them
			for ( index = 0; index < length; index++ ) {
				if ( queue[ index ] && queue[ index ].finish ) {
					queue[ index ].finish.call( this );
				}
			}

			// turn off finishing flag
			delete data.finish;
		});
	}
});

jQuery.each([ "toggle", "show", "hide" ], function( i, name ) {
	var cssFn = jQuery.fn[ name ];
	jQuery.fn[ name ] = function( speed, easing, callback ) {
		return speed == null || typeof speed === "boolean" ?
			cssFn.apply( this, arguments ) :
			this.animate( genFx( name, true ), speed, easing, callback );
	};
});

// Generate shortcuts for custom animations
jQuery.each({
	slideDown: genFx("show"),
	slideUp: genFx("hide"),
	slideToggle: genFx("toggle"),
	fadeIn: { opacity: "show" },
	fadeOut: { opacity: "hide" },
	fadeToggle: { opacity: "toggle" }
}, function( name, props ) {
	jQuery.fn[ name ] = function( speed, easing, callback ) {
		return this.animate( props, speed, easing, callback );
	};
});

jQuery.timers = [];
jQuery.fx.tick = function() {
	var timer,
		timers = jQuery.timers,
		i = 0;

	fxNow = jQuery.now();

	for ( ; i < timers.length; i++ ) {
		timer = timers[ i ];
		// Checks the timer has not already been removed
		if ( !timer() && timers[ i ] === timer ) {
			timers.splice( i--, 1 );
		}
	}

	if ( !timers.length ) {
		jQuery.fx.stop();
	}
	fxNow = undefined;
};

jQuery.fx.timer = function( timer ) {
	jQuery.timers.push( timer );
	if ( timer() ) {
		jQuery.fx.start();
	} else {
		jQuery.timers.pop();
	}
};

jQuery.fx.interval = 13;

jQuery.fx.start = function() {
	if ( !timerId ) {
		timerId = setInterval( jQuery.fx.tick, jQuery.fx.interval );
	}
};

jQuery.fx.stop = function() {
	clearInterval( timerId );
	timerId = null;
};

jQuery.fx.speeds = {
	slow: 600,
	fast: 200,
	// Default speed
	_default: 400
};


// Based off of the plugin by Clint Helfers, with permission.
// http://blindsignals.com/index.php/2009/07/jquery-delay/
jQuery.fn.delay = function( time, type ) {
	time = jQuery.fx ? jQuery.fx.speeds[ time ] || time : time;
	type = type || "fx";

	return this.queue( type, function( next, hooks ) {
		var timeout = setTimeout( next, time );
		hooks.stop = function() {
			clearTimeout( timeout );
		};
	});
};


(function() {
	var a, input, select, opt,
		div = document.createElement("div" );

	// Setup
	div.setAttribute( "className", "t" );
	div.innerHTML = "  <link/><table></table><a href='/a'>a</a><input type='checkbox'/>";
	a = div.getElementsByTagName("a")[ 0 ];

	// First batch of tests.
	select = document.createElement("select");
	opt = select.appendChild( document.createElement("option") );
	input = div.getElementsByTagName("input")[ 0 ];

	a.style.cssText = "top:1px";

	// Test setAttribute on camelCase class. If it works, we need attrFixes when doing get/setAttribute (ie6/7)
	support.getSetAttribute = div.className !== "t";

	// Get the style information from getAttribute
	// (IE uses .cssText instead)
	support.style = /top/.test( a.getAttribute("style") );

	// Make sure that URLs aren't manipulated
	// (IE normalizes it by default)
	support.hrefNormalized = a.getAttribute("href") === "/a";

	// Check the default checkbox/radio value ("" on WebKit; "on" elsewhere)
	support.checkOn = !!input.value;

	// Make sure that a selected-by-default option has a working selected property.
	// (WebKit defaults to false instead of true, IE too, if it's in an optgroup)
	support.optSelected = opt.selected;

	// Tests for enctype support on a form (#6743)
	support.enctype = !!document.createElement("form").enctype;

	// Make sure that the options inside disabled selects aren't marked as disabled
	// (WebKit marks them as disabled)
	select.disabled = true;
	support.optDisabled = !opt.disabled;

	// Support: IE8 only
	// Check if we can trust getAttribute("value")
	input = document.createElement( "input" );
	input.setAttribute( "value", "" );
	support.input = input.getAttribute( "value" ) === "";

	// Check if an input maintains its value after becoming a radio
	input.value = "t";
	input.setAttribute( "type", "radio" );
	support.radioValue = input.value === "t";

	// Null elements to avoid leaks in IE.
	a = input = select = opt = div = null;
})();


var rreturn = /\r/g;

jQuery.fn.extend({
	val: function( value ) {
		var hooks, ret, isFunction,
			elem = this[0];

		if ( !arguments.length ) {
			if ( elem ) {
				hooks = jQuery.valHooks[ elem.type ] || jQuery.valHooks[ elem.nodeName.toLowerCase() ];

				if ( hooks && "get" in hooks && (ret = hooks.get( elem, "value" )) !== undefined ) {
					return ret;
				}

				ret = elem.value;

				return typeof ret === "string" ?
					// handle most common string cases
					ret.replace(rreturn, "") :
					// handle cases where value is null/undef or number
					ret == null ? "" : ret;
			}

			return;
		}

		isFunction = jQuery.isFunction( value );

		return this.each(function( i ) {
			var val;

			if ( this.nodeType !== 1 ) {
				return;
			}

			if ( isFunction ) {
				val = value.call( this, i, jQuery( this ).val() );
			} else {
				val = value;
			}

			// Treat null/undefined as ""; convert numbers to string
			if ( val == null ) {
				val = "";
			} else if ( typeof val === "number" ) {
				val += "";
			} else if ( jQuery.isArray( val ) ) {
				val = jQuery.map( val, function( value ) {
					return value == null ? "" : value + "";
				});
			}

			hooks = jQuery.valHooks[ this.type ] || jQuery.valHooks[ this.nodeName.toLowerCase() ];

			// If set returns undefined, fall back to normal setting
			if ( !hooks || !("set" in hooks) || hooks.set( this, val, "value" ) === undefined ) {
				this.value = val;
			}
		});
	}
});

jQuery.extend({
	valHooks: {
		option: {
			get: function( elem ) {
				var val = jQuery.find.attr( elem, "value" );
				return val != null ?
					val :
					jQuery.text( elem );
			}
		},
		select: {
			get: function( elem ) {
				var value, option,
					options = elem.options,
					index = elem.selectedIndex,
					one = elem.type === "select-one" || index < 0,
					values = one ? null : [],
					max = one ? index + 1 : options.length,
					i = index < 0 ?
						max :
						one ? index : 0;

				// Loop through all the selected options
				for ( ; i < max; i++ ) {
					option = options[ i ];

					// oldIE doesn't update selected after form reset (#2551)
					if ( ( option.selected || i === index ) &&
							// Don't return options that are disabled or in a disabled optgroup
							( support.optDisabled ? !option.disabled : option.getAttribute("disabled") === null ) &&
							( !option.parentNode.disabled || !jQuery.nodeName( option.parentNode, "optgroup" ) ) ) {

						// Get the specific value for the option
						value = jQuery( option ).val();

						// We don't need an array for one selects
						if ( one ) {
							return value;
						}

						// Multi-Selects return an array
						values.push( value );
					}
				}

				return values;
			},

			set: function( elem, value ) {
				var optionSet, option,
					options = elem.options,
					values = jQuery.makeArray( value ),
					i = options.length;

				while ( i-- ) {
					option = options[ i ];

					if ( jQuery.inArray( jQuery.valHooks.option.get( option ), values ) >= 0 ) {

						// Support: IE6
						// When new option element is added to select box we need to
						// force reflow of newly added node in order to workaround delay
						// of initialization properties
						try {
							option.selected = optionSet = true;

						} catch ( _ ) {

							// Will be executed only in IE6
							option.scrollHeight;
						}

					} else {
						option.selected = false;
					}
				}

				// Force browsers to behave consistently when non-matching value is set
				if ( !optionSet ) {
					elem.selectedIndex = -1;
				}

				return options;
			}
		}
	}
});

// Radios and checkboxes getter/setter
jQuery.each([ "radio", "checkbox" ], function() {
	jQuery.valHooks[ this ] = {
		set: function( elem, value ) {
			if ( jQuery.isArray( value ) ) {
				return ( elem.checked = jQuery.inArray( jQuery(elem).val(), value ) >= 0 );
			}
		}
	};
	if ( !support.checkOn ) {
		jQuery.valHooks[ this ].get = function( elem ) {
			// Support: Webkit
			// "" is returned instead of "on" if a value isn't specified
			return elem.getAttribute("value") === null ? "on" : elem.value;
		};
	}
});


var nodeHook, boolHook,
	attrHandle = jQuery.expr.attrHandle,
	ruseDefault = /^(?:checked|selected)$/i,
	getSetAttribute = support.getSetAttribute,
	getSetInput = support.input;

jQuery.fn.extend({
	attr: function( name, value ) {
		return access( this, jQuery.attr, name, value, arguments.length > 1 );
	},

	removeAttr: function( name ) {
		return this.each(function() {
			jQuery.removeAttr( this, name );
		});
	}
});

jQuery.extend({
	attr: function( elem, name, value ) {
		var hooks, ret,
			nType = elem.nodeType;

		// don't get/set attributes on text, comment and attribute nodes
		if ( !elem || nType === 3 || nType === 8 || nType === 2 ) {
			return;
		}

		// Fallback to prop when attributes are not supported
		if ( typeof elem.getAttribute === strundefined ) {
			return jQuery.prop( elem, name, value );
		}

		// All attributes are lowercase
		// Grab necessary hook if one is defined
		if ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {
			name = name.toLowerCase();
			hooks = jQuery.attrHooks[ name ] ||
				( jQuery.expr.match.bool.test( name ) ? boolHook : nodeHook );
		}

		if ( value !== undefined ) {

			if ( value === null ) {
				jQuery.removeAttr( elem, name );

			} else if ( hooks && "set" in hooks && (ret = hooks.set( elem, value, name )) !== undefined ) {
				return ret;

			} else {
				elem.setAttribute( name, value + "" );
				return value;
			}

		} else if ( hooks && "get" in hooks && (ret = hooks.get( elem, name )) !== null ) {
			return ret;

		} else {
			ret = jQuery.find.attr( elem, name );

			// Non-existent attributes return null, we normalize to undefined
			return ret == null ?
				undefined :
				ret;
		}
	},

	removeAttr: function( elem, value ) {
		var name, propName,
			i = 0,
			attrNames = value && value.match( rnotwhite );

		if ( attrNames && elem.nodeType === 1 ) {
			while ( (name = attrNames[i++]) ) {
				propName = jQuery.propFix[ name ] || name;

				// Boolean attributes get special treatment (#10870)
				if ( jQuery.expr.match.bool.test( name ) ) {
					// Set corresponding property to false
					if ( getSetInput && getSetAttribute || !ruseDefault.test( name ) ) {
						elem[ propName ] = false;
					// Support: IE<9
					// Also clear defaultChecked/defaultSelected (if appropriate)
					} else {
						elem[ jQuery.camelCase( "default-" + name ) ] =
							elem[ propName ] = false;
					}

				// See #9699 for explanation of this approach (setting first, then removal)
				} else {
					jQuery.attr( elem, name, "" );
				}

				elem.removeAttribute( getSetAttribute ? name : propName );
			}
		}
	},

	attrHooks: {
		type: {
			set: function( elem, value ) {
				if ( !support.radioValue && value === "radio" && jQuery.nodeName(elem, "input") ) {
					// Setting the type on a radio button after the value resets the value in IE6-9
					// Reset value to default in case type is set after value during creation
					var val = elem.value;
					elem.setAttribute( "type", value );
					if ( val ) {
						elem.value = val;
					}
					return value;
				}
			}
		}
	}
});

// Hook for boolean attributes
boolHook = {
	set: function( elem, value, name ) {
		if ( value === false ) {
			// Remove boolean attributes when set to false
			jQuery.removeAttr( elem, name );
		} else if ( getSetInput && getSetAttribute || !ruseDefault.test( name ) ) {
			// IE<8 needs the *property* name
			elem.setAttribute( !getSetAttribute && jQuery.propFix[ name ] || name, name );

		// Use defaultChecked and defaultSelected for oldIE
		} else {
			elem[ jQuery.camelCase( "default-" + name ) ] = elem[ name ] = true;
		}

		return name;
	}
};

// Retrieve booleans specially
jQuery.each( jQuery.expr.match.bool.source.match( /\w+/g ), function( i, name ) {

	var getter = attrHandle[ name ] || jQuery.find.attr;

	attrHandle[ name ] = getSetInput && getSetAttribute || !ruseDefault.test( name ) ?
		function( elem, name, isXML ) {
			var ret, handle;
			if ( !isXML ) {
				// Avoid an infinite loop by temporarily removing this function from the getter
				handle = attrHandle[ name ];
				attrHandle[ name ] = ret;
				ret = getter( elem, name, isXML ) != null ?
					name.toLowerCase() :
					null;
				attrHandle[ name ] = handle;
			}
			return ret;
		} :
		function( elem, name, isXML ) {
			if ( !isXML ) {
				return elem[ jQuery.camelCase( "default-" + name ) ] ?
					name.toLowerCase() :
					null;
			}
		};
});

// fix oldIE attroperties
if ( !getSetInput || !getSetAttribute ) {
	jQuery.attrHooks.value = {
		set: function( elem, value, name ) {
			if ( jQuery.nodeName( elem, "input" ) ) {
				// Does not return so that setAttribute is also used
				elem.defaultValue = value;
			} else {
				// Use nodeHook if defined (#1954); otherwise setAttribute is fine
				return nodeHook && nodeHook.set( elem, value, name );
			}
		}
	};
}

// IE6/7 do not support getting/setting some attributes with get/setAttribute
if ( !getSetAttribute ) {

	// Use this for any attribute in IE6/7
	// This fixes almost every IE6/7 issue
	nodeHook = {
		set: function( elem, value, name ) {
			// Set the existing or create a new attribute node
			var ret = elem.getAttributeNode( name );
			if ( !ret ) {
				elem.setAttributeNode(
					(ret = elem.ownerDocument.createAttribute( name ))
				);
			}

			ret.value = value += "";

			// Break association with cloned elements by also using setAttribute (#9646)
			if ( name === "value" || value === elem.getAttribute( name ) ) {
				return value;
			}
		}
	};

	// Some attributes are constructed with empty-string values when not defined
	attrHandle.id = attrHandle.name = attrHandle.coords =
		function( elem, name, isXML ) {
			var ret;
			if ( !isXML ) {
				return (ret = elem.getAttributeNode( name )) && ret.value !== "" ?
					ret.value :
					null;
			}
		};

	// Fixing value retrieval on a button requires this module
	jQuery.valHooks.button = {
		get: function( elem, name ) {
			var ret = elem.getAttributeNode( name );
			if ( ret && ret.specified ) {
				return ret.value;
			}
		},
		set: nodeHook.set
	};

	// Set contenteditable to false on removals(#10429)
	// Setting to empty string throws an error as an invalid value
	jQuery.attrHooks.contenteditable = {
		set: function( elem, value, name ) {
			nodeHook.set( elem, value === "" ? false : value, name );
		}
	};

	// Set width and height to auto instead of 0 on empty string( Bug #8150 )
	// This is for removals
	jQuery.each([ "width", "height" ], function( i, name ) {
		jQuery.attrHooks[ name ] = {
			set: function( elem, value ) {
				if ( value === "" ) {
					elem.setAttribute( name, "auto" );
					return value;
				}
			}
		};
	});
}

if ( !support.style ) {
	jQuery.attrHooks.style = {
		get: function( elem ) {
			// Return undefined in the case of empty string
			// Note: IE uppercases css property names, but if we were to .toLowerCase()
			// .cssText, that would destroy case senstitivity in URL's, like in "background"
			return elem.style.cssText || undefined;
		},
		set: function( elem, value ) {
			return ( elem.style.cssText = value + "" );
		}
	};
}


var rfocusable = /^(?:input|select|textarea|button|object)$/i,
	rclickable = /^(?:a|area)$/i;

jQuery.fn.extend({
	prop: function( name, value ) {
		return access( this, jQuery.prop, name, value, arguments.length > 1 );
	},

	removeProp: function( name ) {
		name = jQuery.propFix[ name ] || name;
		return this.each(function() {
			// try/catch handles cases where IE balks (such as removing a property on window)
			try {
				this[ name ] = undefined;
				delete this[ name ];
			} catch( e ) {}
		});
	}
});

jQuery.extend({
	propFix: {
		"for": "htmlFor",
		"class": "className"
	},

	prop: function( elem, name, value ) {
		var ret, hooks, notxml,
			nType = elem.nodeType;

		// don't get/set properties on text, comment and attribute nodes
		if ( !elem || nType === 3 || nType === 8 || nType === 2 ) {
			return;
		}

		notxml = nType !== 1 || !jQuery.isXMLDoc( elem );

		if ( notxml ) {
			// Fix name and attach hooks
			name = jQuery.propFix[ name ] || name;
			hooks = jQuery.propHooks[ name ];
		}

		if ( value !== undefined ) {
			return hooks && "set" in hooks && (ret = hooks.set( elem, value, name )) !== undefined ?
				ret :
				( elem[ name ] = value );

		} else {
			return hooks && "get" in hooks && (ret = hooks.get( elem, name )) !== null ?
				ret :
				elem[ name ];
		}
	},

	propHooks: {
		tabIndex: {
			get: function( elem ) {
				// elem.tabIndex doesn't always return the correct value when it hasn't been explicitly set
				// http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
				// Use proper attribute retrieval(#12072)
				var tabindex = jQuery.find.attr( elem, "tabindex" );

				return tabindex ?
					parseInt( tabindex, 10 ) :
					rfocusable.test( elem.nodeName ) || rclickable.test( elem.nodeName ) && elem.href ?
						0 :
						-1;
			}
		}
	}
});

// Some attributes require a special call on IE
// http://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx
if ( !support.hrefNormalized ) {
	// href/src property should get the full normalized URL (#10299/#12915)
	jQuery.each([ "href", "src" ], function( i, name ) {
		jQuery.propHooks[ name ] = {
			get: function( elem ) {
				return elem.getAttribute( name, 4 );
			}
		};
	});
}

// Support: Safari, IE9+
// mis-reports the default selected property of an option
// Accessing the parent's selectedIndex property fixes it
if ( !support.optSelected ) {
	jQuery.propHooks.selected = {
		get: function( elem ) {
			var parent = elem.parentNode;

			if ( parent ) {
				parent.selectedIndex;

				// Make sure that it also works with optgroups, see #5701
				if ( parent.parentNode ) {
					parent.parentNode.selectedIndex;
				}
			}
			return null;
		}
	};
}

jQuery.each([
	"tabIndex",
	"readOnly",
	"maxLength",
	"cellSpacing",
	"cellPadding",
	"rowSpan",
	"colSpan",
	"useMap",
	"frameBorder",
	"contentEditable"
], function() {
	jQuery.propFix[ this.toLowerCase() ] = this;
});

// IE6/7 call enctype encoding
if ( !support.enctype ) {
	jQuery.propFix.enctype = "encoding";
}


var rclass = /[\t\r\n\f]/g;

jQuery.fn.extend({
	addClass: function( value ) {
		var classes, elem, cur, clazz, j, finalValue,
			i = 0,
			len = this.length,
			proceed = typeof value === "string" && value;

		if ( jQuery.isFunction( value ) ) {
			return this.each(function( j ) {
				jQuery( this ).addClass( value.call( this, j, this.className ) );
			});
		}

		if ( proceed ) {
			// The disjunction here is for better compressibility (see removeClass)
			classes = ( value || "" ).match( rnotwhite ) || [];

			for ( ; i < len; i++ ) {
				elem = this[ i ];
				cur = elem.nodeType === 1 && ( elem.className ?
					( " " + elem.className + " " ).replace( rclass, " " ) :
					" "
				);

				if ( cur ) {
					j = 0;
					while ( (clazz = classes[j++]) ) {
						if ( cur.indexOf( " " + clazz + " " ) < 0 ) {
							cur += clazz + " ";
						}
					}

					// only assign if different to avoid unneeded rendering.
					finalValue = jQuery.trim( cur );
					if ( elem.className !== finalValue ) {
						elem.className = finalValue;
					}
				}
			}
		}

		return this;
	},

	removeClass: function( value ) {
		var classes, elem, cur, clazz, j, finalValue,
			i = 0,
			len = this.length,
			proceed = arguments.length === 0 || typeof value === "string" && value;

		if ( jQuery.isFunction( value ) ) {
			return this.each(function( j ) {
				jQuery( this ).removeClass( value.call( this, j, this.className ) );
			});
		}
		if ( proceed ) {
			classes = ( value || "" ).match( rnotwhite ) || [];

			for ( ; i < len; i++ ) {
				elem = this[ i ];
				// This expression is here for better compressibility (see addClass)
				cur = elem.nodeType === 1 && ( elem.className ?
					( " " + elem.className + " " ).replace( rclass, " " ) :
					""
				);

				if ( cur ) {
					j = 0;
					while ( (clazz = classes[j++]) ) {
						// Remove *all* instances
						while ( cur.indexOf( " " + clazz + " " ) >= 0 ) {
							cur = cur.replace( " " + clazz + " ", " " );
						}
					}

					// only assign if different to avoid unneeded rendering.
					finalValue = value ? jQuery.trim( cur ) : "";
					if ( elem.className !== finalValue ) {
						elem.className = finalValue;
					}
				}
			}
		}

		return this;
	},

	toggleClass: function( value, stateVal ) {
		var type = typeof value;

		if ( typeof stateVal === "boolean" && type === "string" ) {
			return stateVal ? this.addClass( value ) : this.removeClass( value );
		}

		if ( jQuery.isFunction( value ) ) {
			return this.each(function( i ) {
				jQuery( this ).toggleClass( value.call(this, i, this.className, stateVal), stateVal );
			});
		}

		return this.each(function() {
			if ( type === "string" ) {
				// toggle individual class names
				var className,
					i = 0,
					self = jQuery( this ),
					classNames = value.match( rnotwhite ) || [];

				while ( (className = classNames[ i++ ]) ) {
					// check each className given, space separated list
					if ( self.hasClass( className ) ) {
						self.removeClass( className );
					} else {
						self.addClass( className );
					}
				}

			// Toggle whole class name
			} else if ( type === strundefined || type === "boolean" ) {
				if ( this.className ) {
					// store className if set
					jQuery._data( this, "__className__", this.className );
				}

				// If the element has a class name or if we're passed "false",
				// then remove the whole classname (if there was one, the above saved it).
				// Otherwise bring back whatever was previously saved (if anything),
				// falling back to the empty string if nothing was stored.
				this.className = this.className || value === false ? "" : jQuery._data( this, "__className__" ) || "";
			}
		});
	},

	hasClass: function( selector ) {
		var className = " " + selector + " ",
			i = 0,
			l = this.length;
		for ( ; i < l; i++ ) {
			if ( this[i].nodeType === 1 && (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) >= 0 ) {
				return true;
			}
		}

		return false;
	}
});


// Return jQuery for attributes-only inclusion


jQuery.each( ("blur focus focusin focusout load resize scroll unload click dblclick " +
	"mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
	"change select submit keydown keypress keyup error contextmenu").split(" "), function( i, name ) {

	// Handle event binding
	jQuery.fn[ name ] = function( data, fn ) {
		return arguments.length > 0 ?
			this.on( name, null, data, fn ) :
			this.trigger( name );
	};
});

jQuery.fn.extend({
	hover: function( fnOver, fnOut ) {
		return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );
	},

	bind: function( types, data, fn ) {
		return this.on( types, null, data, fn );
	},
	unbind: function( types, fn ) {
		return this.off( types, null, fn );
	},

	delegate: function( selector, types, data, fn ) {
		return this.on( types, selector, data, fn );
	},
	undelegate: function( selector, types, fn ) {
		// ( namespace ) or ( selector, types [, fn] )
		return arguments.length === 1 ? this.off( selector, "**" ) : this.off( types, selector || "**", fn );
	}
});


var nonce = jQuery.now();

var rquery = (/\?/);


var rvalidtokens = /(,)|(\[|{)|(}|])|"(?:[^"\\\r\n]|\\["\\\/bfnrt]|\\u[\da-fA-F]{4})*"\s*:?|true|false|null|-?(?!0\d)\d+(?:\.\d+|)(?:[eE][+-]?\d+|)/g;

jQuery.parseJSON = function( data ) {
	// Attempt to parse using the native JSON parser first
	if ( window.JSON && window.JSON.parse ) {
		// Support: Android 2.3
		// Workaround failure to string-cast null input
		return window.JSON.parse( data + "" );
	}

	var requireNonComma,
		depth = null,
		str = jQuery.trim( data + "" );

	// Guard against invalid (and possibly dangerous) input by ensuring that nothing remains
	// after removing valid tokens
	return str && !jQuery.trim( str.replace( rvalidtokens, function( token, comma, open, close ) {

		// Force termination if we see a misplaced comma
		if ( requireNonComma && comma ) {
			depth = 0;
		}

		// Perform no more replacements after returning to outermost depth
		if ( depth === 0 ) {
			return token;
		}

		// Commas must not follow "[", "{", or ","
		requireNonComma = open || comma;

		// Determine new depth
		// array/object open ("[" or "{"): depth += true - false (increment)
		// array/object close ("]" or "}"): depth += false - true (decrement)
		// other cases ("," or primitive): depth += true - true (numeric cast)
		depth += !close - !open;

		// Remove this token
		return "";
	}) ) ?
		( Function( "return " + str ) )() :
		jQuery.error( "Invalid JSON: " + data );
};


// Cross-browser xml parsing
jQuery.parseXML = function( data ) {
	var xml, tmp;
	if ( !data || typeof data !== "string" ) {
		return null;
	}
	try {
		if ( window.DOMParser ) { // Standard
			tmp = new DOMParser();
			xml = tmp.parseFromString( data, "text/xml" );
		} else { // IE
			xml = new ActiveXObject( "Microsoft.XMLDOM" );
			xml.async = "false";
			xml.loadXML( data );
		}
	} catch( e ) {
		xml = undefined;
	}
	if ( !xml || !xml.documentElement || xml.getElementsByTagName( "parsererror" ).length ) {
		jQuery.error( "Invalid XML: " + data );
	}
	return xml;
};


var
	// Document location
	ajaxLocParts,
	ajaxLocation,

	rhash = /#.*$/,
	rts = /([?&])_=[^&]*/,
	rheaders = /^(.*?):[ \t]*([^\r\n]*)\r?$/mg, // IE leaves an \r character at EOL
	// #7653, #8125, #8152: local protocol detection
	rlocalProtocol = /^(?:about|app|app-storage|.+-extension|file|res|widget):$/,
	rnoContent = /^(?:GET|HEAD)$/,
	rprotocol = /^\/\//,
	rurl = /^([\w.+-]+:)(?:\/\/(?:[^\/?#]*@|)([^\/?#:]*)(?::(\d+)|)|)/,

	/* Prefilters
	 * 1) They are useful to introduce custom dataTypes (see ajax/jsonp.js for an example)
	 * 2) These are called:
	 *    - BEFORE asking for a transport
	 *    - AFTER param serialization (s.data is a string if s.processData is true)
	 * 3) key is the dataType
	 * 4) the catchall symbol "*" can be used
	 * 5) execution will start with transport dataType and THEN continue down to "*" if needed
	 */
	prefilters = {},

	/* Transports bindings
	 * 1) key is the dataType
	 * 2) the catchall symbol "*" can be used
	 * 3) selection will start with transport dataType and THEN go to "*" if needed
	 */
	transports = {},

	// Avoid comment-prolog char sequence (#10098); must appease lint and evade compression
	allTypes = "*/".concat("*");

// #8138, IE may throw an exception when accessing
// a field from window.location if document.domain has been set
try {
	ajaxLocation = location.href;
} catch( e ) {
	// Use the href attribute of an A element
	// since IE will modify it given document.location
	ajaxLocation = document.createElement( "a" );
	ajaxLocation.href = "";
	ajaxLocation = ajaxLocation.href;
}

// Segment location into parts
ajaxLocParts = rurl.exec( ajaxLocation.toLowerCase() ) || [];

// Base "constructor" for jQuery.ajaxPrefilter and jQuery.ajaxTransport
function addToPrefiltersOrTransports( structure ) {

	// dataTypeExpression is optional and defaults to "*"
	return function( dataTypeExpression, func ) {

		if ( typeof dataTypeExpression !== "string" ) {
			func = dataTypeExpression;
			dataTypeExpression = "*";
		}

		var dataType,
			i = 0,
			dataTypes = dataTypeExpression.toLowerCase().match( rnotwhite ) || [];

		if ( jQuery.isFunction( func ) ) {
			// For each dataType in the dataTypeExpression
			while ( (dataType = dataTypes[i++]) ) {
				// Prepend if requested
				if ( dataType.charAt( 0 ) === "+" ) {
					dataType = dataType.slice( 1 ) || "*";
					(structure[ dataType ] = structure[ dataType ] || []).unshift( func );

				// Otherwise append
				} else {
					(structure[ dataType ] = structure[ dataType ] || []).push( func );
				}
			}
		}
	};
}

// Base inspection function for prefilters and transports
function inspectPrefiltersOrTransports( structure, options, originalOptions, jqXHR ) {

	var inspected = {},
		seekingTransport = ( structure === transports );

	function inspect( dataType ) {
		var selected;
		inspected[ dataType ] = true;
		jQuery.each( structure[ dataType ] || [], function( _, prefilterOrFactory ) {
			var dataTypeOrTransport = prefilterOrFactory( options, originalOptions, jqXHR );
			if ( typeof dataTypeOrTransport === "string" && !seekingTransport && !inspected[ dataTypeOrTransport ] ) {
				options.dataTypes.unshift( dataTypeOrTransport );
				inspect( dataTypeOrTransport );
				return false;
			} else if ( seekingTransport ) {
				return !( selected = dataTypeOrTransport );
			}
		});
		return selected;
	}

	return inspect( options.dataTypes[ 0 ] ) || !inspected[ "*" ] && inspect( "*" );
}

// A special extend for ajax options
// that takes "flat" options (not to be deep extended)
// Fixes #9887
function ajaxExtend( target, src ) {
	var deep, key,
		flatOptions = jQuery.ajaxSettings.flatOptions || {};

	for ( key in src ) {
		if ( src[ key ] !== undefined ) {
			( flatOptions[ key ] ? target : ( deep || (deep = {}) ) )[ key ] = src[ key ];
		}
	}
	if ( deep ) {
		jQuery.extend( true, target, deep );
	}

	return target;
}

/* Handles responses to an ajax request:
 * - finds the right dataType (mediates between content-type and expected dataType)
 * - returns the corresponding response
 */
function ajaxHandleResponses( s, jqXHR, responses ) {
	var firstDataType, ct, finalDataType, type,
		contents = s.contents,
		dataTypes = s.dataTypes;

	// Remove auto dataType and get content-type in the process
	while ( dataTypes[ 0 ] === "*" ) {
		dataTypes.shift();
		if ( ct === undefined ) {
			ct = s.mimeType || jqXHR.getResponseHeader("Content-Type");
		}
	}

	// Check if we're dealing with a known content-type
	if ( ct ) {
		for ( type in contents ) {
			if ( contents[ type ] && contents[ type ].test( ct ) ) {
				dataTypes.unshift( type );
				break;
			}
		}
	}

	// Check to see if we have a response for the expected dataType
	if ( dataTypes[ 0 ] in responses ) {
		finalDataType = dataTypes[ 0 ];
	} else {
		// Try convertible dataTypes
		for ( type in responses ) {
			if ( !dataTypes[ 0 ] || s.converters[ type + " " + dataTypes[0] ] ) {
				finalDataType = type;
				break;
			}
			if ( !firstDataType ) {
				firstDataType = type;
			}
		}
		// Or just use first one
		finalDataType = finalDataType || firstDataType;
	}

	// If we found a dataType
	// We add the dataType to the list if needed
	// and return the corresponding response
	if ( finalDataType ) {
		if ( finalDataType !== dataTypes[ 0 ] ) {
			dataTypes.unshift( finalDataType );
		}
		return responses[ finalDataType ];
	}
}

/* Chain conversions given the request and the original response
 * Also sets the responseXXX fields on the jqXHR instance
 */
function ajaxConvert( s, response, jqXHR, isSuccess ) {
	var conv2, current, conv, tmp, prev,
		converters = {},
		// Work with a copy of dataTypes in case we need to modify it for conversion
		dataTypes = s.dataTypes.slice();

	// Create converters map with lowercased keys
	if ( dataTypes[ 1 ] ) {
		for ( conv in s.converters ) {
			converters[ conv.toLowerCase() ] = s.converters[ conv ];
		}
	}

	current = dataTypes.shift();

	// Convert to each sequential dataType
	while ( current ) {

		if ( s.responseFields[ current ] ) {
			jqXHR[ s.responseFields[ current ] ] = response;
		}

		// Apply the dataFilter if provided
		if ( !prev && isSuccess && s.dataFilter ) {
			response = s.dataFilter( response, s.dataType );
		}

		prev = current;
		current = dataTypes.shift();

		if ( current ) {

			// There's only work to do if current dataType is non-auto
			if ( current === "*" ) {

				current = prev;

			// Convert response if prev dataType is non-auto and differs from current
			} else if ( prev !== "*" && prev !== current ) {

				// Seek a direct converter
				conv = converters[ prev + " " + current ] || converters[ "* " + current ];

				// If none found, seek a pair
				if ( !conv ) {
					for ( conv2 in converters ) {

						// If conv2 outputs current
						tmp = conv2.split( " " );
						if ( tmp[ 1 ] === current ) {

							// If prev can be converted to accepted input
							conv = converters[ prev + " " + tmp[ 0 ] ] ||
								converters[ "* " + tmp[ 0 ] ];
							if ( conv ) {
								// Condense equivalence converters
								if ( conv === true ) {
									conv = converters[ conv2 ];

								// Otherwise, insert the intermediate dataType
								} else if ( converters[ conv2 ] !== true ) {
									current = tmp[ 0 ];
									dataTypes.unshift( tmp[ 1 ] );
								}
								break;
							}
						}
					}
				}

				// Apply converter (if not an equivalence)
				if ( conv !== true ) {

					// Unless errors are allowed to bubble, catch and return them
					if ( conv && s[ "throws" ] ) {
						response = conv( response );
					} else {
						try {
							response = conv( response );
						} catch ( e ) {
							return { state: "parsererror", error: conv ? e : "No conversion from " + prev + " to " + current };
						}
					}
				}
			}
		}
	}

	return { state: "success", data: response };
}

jQuery.extend({

	// Counter for holding the number of active queries
	active: 0,

	// Last-Modified header cache for next request
	lastModified: {},
	etag: {},

	ajaxSettings: {
		url: ajaxLocation,
		type: "GET",
		isLocal: rlocalProtocol.test( ajaxLocParts[ 1 ] ),
		global: true,
		processData: true,
		async: true,
		contentType: "application/x-www-form-urlencoded; charset=UTF-8",
		/*
		timeout: 0,
		data: null,
		dataType: null,
		username: null,
		password: null,
		cache: null,
		throws: false,
		traditional: false,
		headers: {},
		*/

		accepts: {
			"*": allTypes,
			text: "text/plain",
			html: "text/html",
			xml: "application/xml, text/xml",
			json: "application/json, text/javascript"
		},

		contents: {
			xml: /xml/,
			html: /html/,
			json: /json/
		},

		responseFields: {
			xml: "responseXML",
			text: "responseText",
			json: "responseJSON"
		},

		// Data converters
		// Keys separate source (or catchall "*") and destination types with a single space
		converters: {

			// Convert anything to text
			"* text": String,

			// Text to html (true = no transformation)
			"text html": true,

			// Evaluate text as a json expression
			"text json": jQuery.parseJSON,

			// Parse text as xml
			"text xml": jQuery.parseXML
		},

		// For options that shouldn't be deep extended:
		// you can add your own custom options here if
		// and when you create one that shouldn't be
		// deep extended (see ajaxExtend)
		flatOptions: {
			url: true,
			context: true
		}
	},

	// Creates a full fledged settings object into target
	// with both ajaxSettings and settings fields.
	// If target is omitted, writes into ajaxSettings.
	ajaxSetup: function( target, settings ) {
		return settings ?

			// Building a settings object
			ajaxExtend( ajaxExtend( target, jQuery.ajaxSettings ), settings ) :

			// Extending ajaxSettings
			ajaxExtend( jQuery.ajaxSettings, target );
	},

	ajaxPrefilter: addToPrefiltersOrTransports( prefilters ),
	ajaxTransport: addToPrefiltersOrTransports( transports ),

	// Main method
	ajax: function( url, options ) {

		// If url is an object, simulate pre-1.5 signature
		if ( typeof url === "object" ) {
			options = url;
			url = undefined;
		}

		// Force options to be an object
		options = options || {};

		var // Cross-domain detection vars
			parts,
			// Loop variable
			i,
			// URL without anti-cache param
			cacheURL,
			// Response headers as string
			responseHeadersString,
			// timeout handle
			timeoutTimer,

			// To know if global events are to be dispatched
			fireGlobals,

			transport,
			// Response headers
			responseHeaders,
			// Create the final options object
			s = jQuery.ajaxSetup( {}, options ),
			// Callbacks context
			callbackContext = s.context || s,
			// Context for global events is callbackContext if it is a DOM node or jQuery collection
			globalEventContext = s.context && ( callbackContext.nodeType || callbackContext.jquery ) ?
				jQuery( callbackContext ) :
				jQuery.event,
			// Deferreds
			deferred = jQuery.Deferred(),
			completeDeferred = jQuery.Callbacks("once memory"),
			// Status-dependent callbacks
			statusCode = s.statusCode || {},
			// Headers (they are sent all at once)
			requestHeaders = {},
			requestHeadersNames = {},
			// The jqXHR state
			state = 0,
			// Default abort message
			strAbort = "canceled",
			// Fake xhr
			jqXHR = {
				readyState: 0,

				// Builds headers hashtable if needed
				getResponseHeader: function( key ) {
					var match;
					if ( state === 2 ) {
						if ( !responseHeaders ) {
							responseHeaders = {};
							while ( (match = rheaders.exec( responseHeadersString )) ) {
								responseHeaders[ match[1].toLowerCase() ] = match[ 2 ];
							}
						}
						match = responseHeaders[ key.toLowerCase() ];
					}
					return match == null ? null : match;
				},

				// Raw string
				getAllResponseHeaders: function() {
					return state === 2 ? responseHeadersString : null;
				},

				// Caches the header
				setRequestHeader: function( name, value ) {
					var lname = name.toLowerCase();
					if ( !state ) {
						name = requestHeadersNames[ lname ] = requestHeadersNames[ lname ] || name;
						requestHeaders[ name ] = value;
					}
					return this;
				},

				// Overrides response content-type header
				overrideMimeType: function( type ) {
					if ( !state ) {
						s.mimeType = type;
					}
					return this;
				},

				// Status-dependent callbacks
				statusCode: function( map ) {
					var code;
					if ( map ) {
						if ( state < 2 ) {
							for ( code in map ) {
								// Lazy-add the new callback in a way that preserves old ones
								statusCode[ code ] = [ statusCode[ code ], map[ code ] ];
							}
						} else {
							// Execute the appropriate callbacks
							jqXHR.always( map[ jqXHR.status ] );
						}
					}
					return this;
				},

				// Cancel the request
				abort: function( statusText ) {
					var finalText = statusText || strAbort;
					if ( transport ) {
						transport.abort( finalText );
					}
					done( 0, finalText );
					return this;
				}
			};

		// Attach deferreds
		deferred.promise( jqXHR ).complete = completeDeferred.add;
		jqXHR.success = jqXHR.done;
		jqXHR.error = jqXHR.fail;

		// Remove hash character (#7531: and string promotion)
		// Add protocol if not provided (#5866: IE7 issue with protocol-less urls)
		// Handle falsy url in the settings object (#10093: consistency with old signature)
		// We also use the url parameter if available
		s.url = ( ( url || s.url || ajaxLocation ) + "" ).replace( rhash, "" ).replace( rprotocol, ajaxLocParts[ 1 ] + "//" );

		// Alias method option to type as per ticket #12004
		s.type = options.method || options.type || s.method || s.type;

		// Extract dataTypes list
		s.dataTypes = jQuery.trim( s.dataType || "*" ).toLowerCase().match( rnotwhite ) || [ "" ];

		// A cross-domain request is in order when we have a protocol:host:port mismatch
		if ( s.crossDomain == null ) {
			parts = rurl.exec( s.url.toLowerCase() );
			s.crossDomain = !!( parts &&
				( parts[ 1 ] !== ajaxLocParts[ 1 ] || parts[ 2 ] !== ajaxLocParts[ 2 ] ||
					( parts[ 3 ] || ( parts[ 1 ] === "http:" ? "80" : "443" ) ) !==
						( ajaxLocParts[ 3 ] || ( ajaxLocParts[ 1 ] === "http:" ? "80" : "443" ) ) )
			);
		}

		// Convert data if not already a string
		if ( s.data && s.processData && typeof s.data !== "string" ) {
			s.data = jQuery.param( s.data, s.traditional );
		}

		// Apply prefilters
		inspectPrefiltersOrTransports( prefilters, s, options, jqXHR );

		// If request was aborted inside a prefilter, stop there
		if ( state === 2 ) {
			return jqXHR;
		}

		// We can fire global events as of now if asked to
		fireGlobals = s.global;

		// Watch for a new set of requests
		if ( fireGlobals && jQuery.active++ === 0 ) {
			jQuery.event.trigger("ajaxStart");
		}

		// Uppercase the type
		s.type = s.type.toUpperCase();

		// Determine if request has content
		s.hasContent = !rnoContent.test( s.type );

		// Save the URL in case we're toying with the If-Modified-Since
		// and/or If-None-Match header later on
		cacheURL = s.url;

		// More options handling for requests with no content
		if ( !s.hasContent ) {

			// If data is available, append data to url
			if ( s.data ) {
				cacheURL = ( s.url += ( rquery.test( cacheURL ) ? "&" : "?" ) + s.data );
				// #9682: remove data so that it's not used in an eventual retry
				delete s.data;
			}

			// Add anti-cache in url if needed
			if ( s.cache === false ) {
				s.url = rts.test( cacheURL ) ?

					// If there is already a '_' parameter, set its value
					cacheURL.replace( rts, "$1_=" + nonce++ ) :

					// Otherwise add one to the end
					cacheURL + ( rquery.test( cacheURL ) ? "&" : "?" ) + "_=" + nonce++;
			}
		}

		// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
		if ( s.ifModified ) {
			if ( jQuery.lastModified[ cacheURL ] ) {
				jqXHR.setRequestHeader( "If-Modified-Since", jQuery.lastModified[ cacheURL ] );
			}
			if ( jQuery.etag[ cacheURL ] ) {
				jqXHR.setRequestHeader( "If-None-Match", jQuery.etag[ cacheURL ] );
			}
		}

		// Set the correct header, if data is being sent
		if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
			jqXHR.setRequestHeader( "Content-Type", s.contentType );
		}

		// Set the Accepts header for the server, depending on the dataType
		jqXHR.setRequestHeader(
			"Accept",
			s.dataTypes[ 0 ] && s.accepts[ s.dataTypes[0] ] ?
				s.accepts[ s.dataTypes[0] ] + ( s.dataTypes[ 0 ] !== "*" ? ", " + allTypes + "; q=0.01" : "" ) :
				s.accepts[ "*" ]
		);

		// Check for headers option
		for ( i in s.headers ) {
			jqXHR.setRequestHeader( i, s.headers[ i ] );
		}

		// Allow custom headers/mimetypes and early abort
		if ( s.beforeSend && ( s.beforeSend.call( callbackContext, jqXHR, s ) === false || state === 2 ) ) {
			// Abort if not done already and return
			return jqXHR.abort();
		}

		// aborting is no longer a cancellation
		strAbort = "abort";

		// Install callbacks on deferreds
		for ( i in { success: 1, error: 1, complete: 1 } ) {
			jqXHR[ i ]( s[ i ] );
		}

		// Get transport
		transport = inspectPrefiltersOrTransports( transports, s, options, jqXHR );

		// If no transport, we auto-abort
		if ( !transport ) {
			done( -1, "No Transport" );
		} else {
			jqXHR.readyState = 1;

			// Send global event
			if ( fireGlobals ) {
				globalEventContext.trigger( "ajaxSend", [ jqXHR, s ] );
			}
			// Timeout
			if ( s.async && s.timeout > 0 ) {
				timeoutTimer = setTimeout(function() {
					jqXHR.abort("timeout");
				}, s.timeout );
			}

			try {
				state = 1;
				transport.send( requestHeaders, done );
			} catch ( e ) {
				// Propagate exception as error if not done
				if ( state < 2 ) {
					done( -1, e );
				// Simply rethrow otherwise
				} else {
					throw e;
				}
			}
		}

		// Callback for when everything is done
		function done( status, nativeStatusText, responses, headers ) {
			var isSuccess, success, error, response, modified,
				statusText = nativeStatusText;

			// Called once
			if ( state === 2 ) {
				return;
			}

			// State is "done" now
			state = 2;

			// Clear timeout if it exists
			if ( timeoutTimer ) {
				clearTimeout( timeoutTimer );
			}

			// Dereference transport for early garbage collection
			// (no matter how long the jqXHR object will be used)
			transport = undefined;

			// Cache response headers
			responseHeadersString = headers || "";

			// Set readyState
			jqXHR.readyState = status > 0 ? 4 : 0;

			// Determine if successful
			isSuccess = status >= 200 && status < 300 || status === 304;

			// Get response data
			if ( responses ) {
				response = ajaxHandleResponses( s, jqXHR, responses );
			}

			// Convert no matter what (that way responseXXX fields are always set)
			response = ajaxConvert( s, response, jqXHR, isSuccess );

			// If successful, handle type chaining
			if ( isSuccess ) {

				// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
				if ( s.ifModified ) {
					modified = jqXHR.getResponseHeader("Last-Modified");
					if ( modified ) {
						jQuery.lastModified[ cacheURL ] = modified;
					}
					modified = jqXHR.getResponseHeader("etag");
					if ( modified ) {
						jQuery.etag[ cacheURL ] = modified;
					}
				}

				// if no content
				if ( status === 204 || s.type === "HEAD" ) {
					statusText = "nocontent";

				// if not modified
				} else if ( status === 304 ) {
					statusText = "notmodified";

				// If we have data, let's convert it
				} else {
					statusText = response.state;
					success = response.data;
					error = response.error;
					isSuccess = !error;
				}
			} else {
				// We extract error from statusText
				// then normalize statusText and status for non-aborts
				error = statusText;
				if ( status || !statusText ) {
					statusText = "error";
					if ( status < 0 ) {
						status = 0;
					}
				}
			}

			// Set data for the fake xhr object
			jqXHR.status = status;
			jqXHR.statusText = ( nativeStatusText || statusText ) + "";

			// Success/Error
			if ( isSuccess ) {
				deferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );
			} else {
				deferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );
			}

			// Status-dependent callbacks
			jqXHR.statusCode( statusCode );
			statusCode = undefined;

			if ( fireGlobals ) {
				globalEventContext.trigger( isSuccess ? "ajaxSuccess" : "ajaxError",
					[ jqXHR, s, isSuccess ? success : error ] );
			}

			// Complete
			completeDeferred.fireWith( callbackContext, [ jqXHR, statusText ] );

			if ( fireGlobals ) {
				globalEventContext.trigger( "ajaxComplete", [ jqXHR, s ] );
				// Handle the global AJAX counter
				if ( !( --jQuery.active ) ) {
					jQuery.event.trigger("ajaxStop");
				}
			}
		}

		return jqXHR;
	},

	getJSON: function( url, data, callback ) {
		return jQuery.get( url, data, callback, "json" );
	},

	getScript: function( url, callback ) {
		return jQuery.get( url, undefined, callback, "script" );
	}
});

jQuery.each( [ "get", "post" ], function( i, method ) {
	jQuery[ method ] = function( url, data, callback, type ) {
		// shift arguments if data argument was omitted
		if ( jQuery.isFunction( data ) ) {
			type = type || callback;
			callback = data;
			data = undefined;
		}

		return jQuery.ajax({
			url: url,
			type: method,
			dataType: type,
			data: data,
			success: callback
		});
	};
});

// Attach a bunch of functions for handling common AJAX events
jQuery.each( [ "ajaxStart", "ajaxStop", "ajaxComplete", "ajaxError", "ajaxSuccess", "ajaxSend" ], function( i, type ) {
	jQuery.fn[ type ] = function( fn ) {
		return this.on( type, fn );
	};
});


jQuery._evalUrl = function( url ) {
	return jQuery.ajax({
		url: url,
		type: "GET",
		dataType: "script",
		async: false,
		global: false,
		"throws": true
	});
};


jQuery.fn.extend({
	wrapAll: function( html ) {
		if ( jQuery.isFunction( html ) ) {
			return this.each(function(i) {
				jQuery(this).wrapAll( html.call(this, i) );
			});
		}

		if ( this[0] ) {
			// The elements to wrap the target around
			var wrap = jQuery( html, this[0].ownerDocument ).eq(0).clone(true);

			if ( this[0].parentNode ) {
				wrap.insertBefore( this[0] );
			}

			wrap.map(function() {
				var elem = this;

				while ( elem.firstChild && elem.firstChild.nodeType === 1 ) {
					elem = elem.firstChild;
				}

				return elem;
			}).append( this );
		}

		return this;
	},

	wrapInner: function( html ) {
		if ( jQuery.isFunction( html ) ) {
			return this.each(function(i) {
				jQuery(this).wrapInner( html.call(this, i) );
			});
		}

		return this.each(function() {
			var self = jQuery( this ),
				contents = self.contents();

			if ( contents.length ) {
				contents.wrapAll( html );

			} else {
				self.append( html );
			}
		});
	},

	wrap: function( html ) {
		var isFunction = jQuery.isFunction( html );

		return this.each(function(i) {
			jQuery( this ).wrapAll( isFunction ? html.call(this, i) : html );
		});
	},

	unwrap: function() {
		return this.parent().each(function() {
			if ( !jQuery.nodeName( this, "body" ) ) {
				jQuery( this ).replaceWith( this.childNodes );
			}
		}).end();
	}
});


jQuery.expr.filters.hidden = function( elem ) {
	// Support: Opera <= 12.12
	// Opera reports offsetWidths and offsetHeights less than zero on some elements
	return elem.offsetWidth <= 0 && elem.offsetHeight <= 0 ||
		(!support.reliableHiddenOffsets() &&
			((elem.style && elem.style.display) || jQuery.css( elem, "display" )) === "none");
};

jQuery.expr.filters.visible = function( elem ) {
	return !jQuery.expr.filters.hidden( elem );
};


var r20 = /%20/g,
	rbracket = /\[\]$/,
	rCRLF = /\r?\n/g,
	rsubmitterTypes = /^(?:submit|button|image|reset|file)$/i,
	rsubmittable = /^(?:input|select|textarea|keygen)/i;

function buildParams( prefix, obj, traditional, add ) {
	var name;

	if ( jQuery.isArray( obj ) ) {
		// Serialize array item.
		jQuery.each( obj, function( i, v ) {
			if ( traditional || rbracket.test( prefix ) ) {
				// Treat each array item as a scalar.
				add( prefix, v );

			} else {
				// Item is non-scalar (array or object), encode its numeric index.
				buildParams( prefix + "[" + ( typeof v === "object" ? i : "" ) + "]", v, traditional, add );
			}
		});

	} else if ( !traditional && jQuery.type( obj ) === "object" ) {
		// Serialize object item.
		for ( name in obj ) {
			buildParams( prefix + "[" + name + "]", obj[ name ], traditional, add );
		}

	} else {
		// Serialize scalar item.
		add( prefix, obj );
	}
}

// Serialize an array of form elements or a set of
// key/values into a query string
jQuery.param = function( a, traditional ) {
	var prefix,
		s = [],
		add = function( key, value ) {
			// If value is a function, invoke it and return its value
			value = jQuery.isFunction( value ) ? value() : ( value == null ? "" : value );
			s[ s.length ] = encodeURIComponent( key ) + "=" + encodeURIComponent( value );
		};

	// Set traditional to true for jQuery <= 1.3.2 behavior.
	if ( traditional === undefined ) {
		traditional = jQuery.ajaxSettings && jQuery.ajaxSettings.traditional;
	}

	// If an array was passed in, assume that it is an array of form elements.
	if ( jQuery.isArray( a ) || ( a.jquery && !jQuery.isPlainObject( a ) ) ) {
		// Serialize the form elements
		jQuery.each( a, function() {
			add( this.name, this.value );
		});

	} else {
		// If traditional, encode the "old" way (the way 1.3.2 or older
		// did it), otherwise encode params recursively.
		for ( prefix in a ) {
			buildParams( prefix, a[ prefix ], traditional, add );
		}
	}

	// Return the resulting serialization
	return s.join( "&" ).replace( r20, "+" );
};

jQuery.fn.extend({
	serialize: function() {
		return jQuery.param( this.serializeArray() );
	},
	serializeArray: function() {
		return this.map(function() {
			// Can add propHook for "elements" to filter or add form elements
			var elements = jQuery.prop( this, "elements" );
			return elements ? jQuery.makeArray( elements ) : this;
		})
		.filter(function() {
			var type = this.type;
			// Use .is(":disabled") so that fieldset[disabled] works
			return this.name && !jQuery( this ).is( ":disabled" ) &&
				rsubmittable.test( this.nodeName ) && !rsubmitterTypes.test( type ) &&
				( this.checked || !rcheckableType.test( type ) );
		})
		.map(function( i, elem ) {
			var val = jQuery( this ).val();

			return val == null ?
				null :
				jQuery.isArray( val ) ?
					jQuery.map( val, function( val ) {
						return { name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
					}) :
					{ name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
		}).get();
	}
});


// Create the request object
// (This is still attached to ajaxSettings for backward compatibility)
jQuery.ajaxSettings.xhr = window.ActiveXObject !== undefined ?
	// Support: IE6+
	function() {

		// XHR cannot access local files, always use ActiveX for that case
		return !this.isLocal &&

			// Support: IE7-8
			// oldIE XHR does not support non-RFC2616 methods (#13240)
			// See http://msdn.microsoft.com/en-us/library/ie/ms536648(v=vs.85).aspx
			// and http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9
			// Although this check for six methods instead of eight
			// since IE also does not support "trace" and "connect"
			/^(get|post|head|put|delete|options)$/i.test( this.type ) &&

			createStandardXHR() || createActiveXHR();
	} :
	// For all other browsers, use the standard XMLHttpRequest object
	createStandardXHR;

var xhrId = 0,
	xhrCallbacks = {},
	xhrSupported = jQuery.ajaxSettings.xhr();

// Support: IE<10
// Open requests must be manually aborted on unload (#5280)
if ( window.ActiveXObject ) {
	jQuery( window ).on( "unload", function() {
		for ( var key in xhrCallbacks ) {
			xhrCallbacks[ key ]( undefined, true );
		}
	});
}

// Determine support properties
support.cors = !!xhrSupported && ( "withCredentials" in xhrSupported );
xhrSupported = support.ajax = !!xhrSupported;

// Create transport if the browser can provide an xhr
if ( xhrSupported ) {

	jQuery.ajaxTransport(function( options ) {
		// Cross domain only allowed if supported through XMLHttpRequest
		if ( !options.crossDomain || support.cors ) {

			var callback;

			return {
				send: function( headers, complete ) {
					var i,
						xhr = options.xhr(),
						id = ++xhrId;

					// Open the socket
					xhr.open( options.type, options.url, options.async, options.username, options.password );

					// Apply custom fields if provided
					if ( options.xhrFields ) {
						for ( i in options.xhrFields ) {
							xhr[ i ] = options.xhrFields[ i ];
						}
					}

					// Override mime type if needed
					if ( options.mimeType && xhr.overrideMimeType ) {
						xhr.overrideMimeType( options.mimeType );
					}

					// X-Requested-With header
					// For cross-domain requests, seeing as conditions for a preflight are
					// akin to a jigsaw puzzle, we simply never set it to be sure.
					// (it can always be set on a per-request basis or even using ajaxSetup)
					// For same-domain requests, won't change header if already provided.
					if ( !options.crossDomain && !headers["X-Requested-With"] ) {
						headers["X-Requested-With"] = "XMLHttpRequest";
					}

					// Set headers
					for ( i in headers ) {
						// Support: IE<9
						// IE's ActiveXObject throws a 'Type Mismatch' exception when setting
						// request header to a null-value.
						//
						// To keep consistent with other XHR implementations, cast the value
						// to string and ignore `undefined`.
						if ( headers[ i ] !== undefined ) {
							xhr.setRequestHeader( i, headers[ i ] + "" );
						}
					}

					// Do send the request
					// This may raise an exception which is actually
					// handled in jQuery.ajax (so no try/catch here)
					xhr.send( ( options.hasContent && options.data ) || null );

					// Listener
					callback = function( _, isAbort ) {
						var status, statusText, responses;

						// Was never called and is aborted or complete
						if ( callback && ( isAbort || xhr.readyState === 4 ) ) {
							// Clean up
							delete xhrCallbacks[ id ];
							callback = undefined;
							xhr.onreadystatechange = jQuery.noop;

							// Abort manually if needed
							if ( isAbort ) {
								if ( xhr.readyState !== 4 ) {
									xhr.abort();
								}
							} else {
								responses = {};
								status = xhr.status;

								// Support: IE<10
								// Accessing binary-data responseText throws an exception
								// (#11426)
								if ( typeof xhr.responseText === "string" ) {
									responses.text = xhr.responseText;
								}

								// Firefox throws an exception when accessing
								// statusText for faulty cross-domain requests
								try {
									statusText = xhr.statusText;
								} catch( e ) {
									// We normalize with Webkit giving an empty statusText
									statusText = "";
								}

								// Filter status for non standard behaviors

								// If the request is local and we have data: assume a success
								// (success with no data won't get notified, that's the best we
								// can do given current implementations)
								if ( !status && options.isLocal && !options.crossDomain ) {
									status = responses.text ? 200 : 404;
								// IE - #1450: sometimes returns 1223 when it should be 204
								} else if ( status === 1223 ) {
									status = 204;
								}
							}
						}

						// Call complete if needed
						if ( responses ) {
							complete( status, statusText, responses, xhr.getAllResponseHeaders() );
						}
					};

					if ( !options.async ) {
						// if we're in sync mode we fire the callback
						callback();
					} else if ( xhr.readyState === 4 ) {
						// (IE6 & IE7) if it's in cache and has been
						// retrieved directly we need to fire the callback
						setTimeout( callback );
					} else {
						// Add to the list of active xhr callbacks
						xhr.onreadystatechange = xhrCallbacks[ id ] = callback;
					}
				},

				abort: function() {
					if ( callback ) {
						callback( undefined, true );
					}
				}
			};
		}
	});
}

// Functions to create xhrs
function createStandardXHR() {
	try {
		return new window.XMLHttpRequest();
	} catch( e ) {}
}

function createActiveXHR() {
	try {
		return new window.ActiveXObject( "Microsoft.XMLHTTP" );
	} catch( e ) {}
}


// Install script dataType
jQuery.ajaxSetup({
	accepts: {
		script: "text/javascript, application/javascript, application/ecmascript, application/x-ecmascript"
	},
	contents: {
		script: /(?:java|ecma)script/
	},
	converters: {
		"text script": function( text ) {
			jQuery.globalEval( text );
			return text;
		}
	}
});

// Handle cache's special case and global
jQuery.ajaxPrefilter( "script", function( s ) {
	if ( s.cache === undefined ) {
		s.cache = false;
	}
	if ( s.crossDomain ) {
		s.type = "GET";
		s.global = false;
	}
});

// Bind script tag hack transport
jQuery.ajaxTransport( "script", function(s) {

	// This transport only deals with cross domain requests
	if ( s.crossDomain ) {

		var script,
			head = document.head || jQuery("head")[0] || document.documentElement;

		return {

			send: function( _, callback ) {

				script = document.createElement("script");

				script.async = true;

				if ( s.scriptCharset ) {
					script.charset = s.scriptCharset;
				}

				script.src = s.url;

				// Attach handlers for all browsers
				script.onload = script.onreadystatechange = function( _, isAbort ) {

					if ( isAbort || !script.readyState || /loaded|complete/.test( script.readyState ) ) {

						// Handle memory leak in IE
						script.onload = script.onreadystatechange = null;

						// Remove the script
						if ( script.parentNode ) {
							script.parentNode.removeChild( script );
						}

						// Dereference the script
						script = null;

						// Callback if not abort
						if ( !isAbort ) {
							callback( 200, "success" );
						}
					}
				};

				// Circumvent IE6 bugs with base elements (#2709 and #4378) by prepending
				// Use native DOM manipulation to avoid our domManip AJAX trickery
				head.insertBefore( script, head.firstChild );
			},

			abort: function() {
				if ( script ) {
					script.onload( undefined, true );
				}
			}
		};
	}
});


var oldCallbacks = [],
	rjsonp = /(=)\?(?=&|$)|\?\?/;

// Default jsonp settings
jQuery.ajaxSetup({
	jsonp: "callback",
	jsonpCallback: function() {
		var callback = oldCallbacks.pop() || ( jQuery.expando + "_" + ( nonce++ ) );
		this[ callback ] = true;
		return callback;
	}
});

// Detect, normalize options and install callbacks for jsonp requests
jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, jqXHR ) {

	var callbackName, overwritten, responseContainer,
		jsonProp = s.jsonp !== false && ( rjsonp.test( s.url ) ?
			"url" :
			typeof s.data === "string" && !( s.contentType || "" ).indexOf("application/x-www-form-urlencoded") && rjsonp.test( s.data ) && "data"
		);

	// Handle iff the expected data type is "jsonp" or we have a parameter to set
	if ( jsonProp || s.dataTypes[ 0 ] === "jsonp" ) {

		// Get callback name, remembering preexisting value associated with it
		callbackName = s.jsonpCallback = jQuery.isFunction( s.jsonpCallback ) ?
			s.jsonpCallback() :
			s.jsonpCallback;

		// Insert callback into url or form data
		if ( jsonProp ) {
			s[ jsonProp ] = s[ jsonProp ].replace( rjsonp, "$1" + callbackName );
		} else if ( s.jsonp !== false ) {
			s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.jsonp + "=" + callbackName;
		}

		// Use data converter to retrieve json after script execution
		s.converters["script json"] = function() {
			if ( !responseContainer ) {
				jQuery.error( callbackName + " was not called" );
			}
			return responseContainer[ 0 ];
		};

		// force json dataType
		s.dataTypes[ 0 ] = "json";

		// Install callback
		overwritten = window[ callbackName ];
		window[ callbackName ] = function() {
			responseContainer = arguments;
		};

		// Clean-up function (fires after converters)
		jqXHR.always(function() {
			// Restore preexisting value
			window[ callbackName ] = overwritten;

			// Save back as free
			if ( s[ callbackName ] ) {
				// make sure that re-using the options doesn't screw things around
				s.jsonpCallback = originalSettings.jsonpCallback;

				// save the callback name for future use
				oldCallbacks.push( callbackName );
			}

			// Call if it was a function and we have a response
			if ( responseContainer && jQuery.isFunction( overwritten ) ) {
				overwritten( responseContainer[ 0 ] );
			}

			responseContainer = overwritten = undefined;
		});

		// Delegate to script
		return "script";
	}
});


// data: string of html
// context (optional): If specified, the fragment will be created in this context, defaults to document
// keepScripts (optional): If true, will include scripts passed in the html string
jQuery.parseHTML = function( data, context, keepScripts ) {
	if ( !data || typeof data !== "string" ) {
		return null;
	}
	if ( typeof context === "boolean" ) {
		keepScripts = context;
		context = false;
	}
	context = context || document;

	var parsed = rsingleTag.exec( data ),
		scripts = !keepScripts && [];

	// Single tag
	if ( parsed ) {
		return [ context.createElement( parsed[1] ) ];
	}

	parsed = jQuery.buildFragment( [ data ], context, scripts );

	if ( scripts && scripts.length ) {
		jQuery( scripts ).remove();
	}

	return jQuery.merge( [], parsed.childNodes );
};


// Keep a copy of the old load method
var _load = jQuery.fn.load;

/**
 * Load a url into a page
 */
jQuery.fn.load = function( url, params, callback ) {
	if ( typeof url !== "string" && _load ) {
		return _load.apply( this, arguments );
	}

	var selector, response, type,
		self = this,
		off = url.indexOf(" ");

	if ( off >= 0 ) {
		selector = url.slice( off, url.length );
		url = url.slice( 0, off );
	}

	// If it's a function
	if ( jQuery.isFunction( params ) ) {

		// We assume that it's the callback
		callback = params;
		params = undefined;

	// Otherwise, build a param string
	} else if ( params && typeof params === "object" ) {
		type = "POST";
	}

	// If we have elements to modify, make the request
	if ( self.length > 0 ) {
		jQuery.ajax({
			url: url,

			// if "type" variable is undefined, then "GET" method will be used
			type: type,
			dataType: "html",
			data: params
		}).done(function( responseText ) {

			// Save response for use in complete callback
			response = arguments;

			self.html( selector ?

				// If a selector was specified, locate the right elements in a dummy div
				// Exclude scripts to avoid IE 'Permission Denied' errors
				jQuery("<div>").append( jQuery.parseHTML( responseText ) ).find( selector ) :

				// Otherwise use the full result
				responseText );

		}).complete( callback && function( jqXHR, status ) {
			self.each( callback, response || [ jqXHR.responseText, status, jqXHR ] );
		});
	}

	return this;
};


jQuery.expr.filters.animated = function( elem ) {
	return jQuery.grep(jQuery.timers, function( fn ) {
		return elem === fn.elem;
	}).length;
};


var docElem = window.document.documentElement;

/**
 * Gets a window from an element
 */
function getWindow( elem ) {
	return jQuery.isWindow( elem ) ?
		elem :
		elem.nodeType === 9 ?
			elem.defaultView || elem.parentWindow :
			false;
}

jQuery.offset = {
	setOffset: function( elem, options, i ) {
		var curPosition, curLeft, curCSSTop, curTop, curOffset, curCSSLeft, calculatePosition,
			position = jQuery.css( elem, "position" ),
			curElem = jQuery( elem ),
			props = {};

		// set position first, in-case top/left are set even on static elem
		if ( position === "static" ) {
			elem.style.position = "relative";
		}

		curOffset = curElem.offset();
		curCSSTop = jQuery.css( elem, "top" );
		curCSSLeft = jQuery.css( elem, "left" );
		calculatePosition = ( position === "absolute" || position === "fixed" ) &&
			jQuery.inArray("auto", [ curCSSTop, curCSSLeft ] ) > -1;

		// need to be able to calculate position if either top or left is auto and position is either absolute or fixed
		if ( calculatePosition ) {
			curPosition = curElem.position();
			curTop = curPosition.top;
			curLeft = curPosition.left;
		} else {
			curTop = parseFloat( curCSSTop ) || 0;
			curLeft = parseFloat( curCSSLeft ) || 0;
		}

		if ( jQuery.isFunction( options ) ) {
			options = options.call( elem, i, curOffset );
		}

		if ( options.top != null ) {
			props.top = ( options.top - curOffset.top ) + curTop;
		}
		if ( options.left != null ) {
			props.left = ( options.left - curOffset.left ) + curLeft;
		}

		if ( "using" in options ) {
			options.using.call( elem, props );
		} else {
			curElem.css( props );
		}
	}
};

jQuery.fn.extend({
	offset: function( options ) {
		if ( arguments.length ) {
			return options === undefined ?
				this :
				this.each(function( i ) {
					jQuery.offset.setOffset( this, options, i );
				});
		}

		var docElem, win,
			box = { top: 0, left: 0 },
			elem = this[ 0 ],
			doc = elem && elem.ownerDocument;

		if ( !doc ) {
			return;
		}

		docElem = doc.documentElement;

		// Make sure it's not a disconnected DOM node
		if ( !jQuery.contains( docElem, elem ) ) {
			return box;
		}

		// If we don't have gBCR, just use 0,0 rather than error
		// BlackBerry 5, iOS 3 (original iPhone)
		if ( typeof elem.getBoundingClientRect !== strundefined ) {
			box = elem.getBoundingClientRect();
		}
		win = getWindow( doc );
		return {
			top: box.top  + ( win.pageYOffset || docElem.scrollTop )  - ( docElem.clientTop  || 0 ),
			left: box.left + ( win.pageXOffset || docElem.scrollLeft ) - ( docElem.clientLeft || 0 )
		};
	},

	position: function() {
		if ( !this[ 0 ] ) {
			return;
		}

		var offsetParent, offset,
			parentOffset = { top: 0, left: 0 },
			elem = this[ 0 ];

		// fixed elements are offset from window (parentOffset = {top:0, left: 0}, because it is its only offset parent
		if ( jQuery.css( elem, "position" ) === "fixed" ) {
			// we assume that getBoundingClientRect is available when computed position is fixed
			offset = elem.getBoundingClientRect();
		} else {
			// Get *real* offsetParent
			offsetParent = this.offsetParent();

			// Get correct offsets
			offset = this.offset();
			if ( !jQuery.nodeName( offsetParent[ 0 ], "html" ) ) {
				parentOffset = offsetParent.offset();
			}

			// Add offsetParent borders
			parentOffset.top  += jQuery.css( offsetParent[ 0 ], "borderTopWidth", true );
			parentOffset.left += jQuery.css( offsetParent[ 0 ], "borderLeftWidth", true );
		}

		// Subtract parent offsets and element margins
		// note: when an element has margin: auto the offsetLeft and marginLeft
		// are the same in Safari causing offset.left to incorrectly be 0
		return {
			top:  offset.top  - parentOffset.top - jQuery.css( elem, "marginTop", true ),
			left: offset.left - parentOffset.left - jQuery.css( elem, "marginLeft", true)
		};
	},

	offsetParent: function() {
		return this.map(function() {
			var offsetParent = this.offsetParent || docElem;

			while ( offsetParent && ( !jQuery.nodeName( offsetParent, "html" ) && jQuery.css( offsetParent, "position" ) === "static" ) ) {
				offsetParent = offsetParent.offsetParent;
			}
			return offsetParent || docElem;
		});
	}
});

// Create scrollLeft and scrollTop methods
jQuery.each( { scrollLeft: "pageXOffset", scrollTop: "pageYOffset" }, function( method, prop ) {
	var top = /Y/.test( prop );

	jQuery.fn[ method ] = function( val ) {
		return access( this, function( elem, method, val ) {
			var win = getWindow( elem );

			if ( val === undefined ) {
				return win ? (prop in win) ? win[ prop ] :
					win.document.documentElement[ method ] :
					elem[ method ];
			}

			if ( win ) {
				win.scrollTo(
					!top ? val : jQuery( win ).scrollLeft(),
					top ? val : jQuery( win ).scrollTop()
				);

			} else {
				elem[ method ] = val;
			}
		}, method, val, arguments.length, null );
	};
});

// Add the top/left cssHooks using jQuery.fn.position
// Webkit bug: https://bugs.webkit.org/show_bug.cgi?id=29084
// getComputedStyle returns percent when specified for top/left/bottom/right
// rather than make the css module depend on the offset module, we just check for it here
jQuery.each( [ "top", "left" ], function( i, prop ) {
	jQuery.cssHooks[ prop ] = addGetHookIf( support.pixelPosition,
		function( elem, computed ) {
			if ( computed ) {
				computed = curCSS( elem, prop );
				// if curCSS returns percentage, fallback to offset
				return rnumnonpx.test( computed ) ?
					jQuery( elem ).position()[ prop ] + "px" :
					computed;
			}
		}
	);
});


// Create innerHeight, innerWidth, height, width, outerHeight and outerWidth methods
jQuery.each( { Height: "height", Width: "width" }, function( name, type ) {
	jQuery.each( { padding: "inner" + name, content: type, "": "outer" + name }, function( defaultExtra, funcName ) {
		// margin is only for outerHeight, outerWidth
		jQuery.fn[ funcName ] = function( margin, value ) {
			var chainable = arguments.length && ( defaultExtra || typeof margin !== "boolean" ),
				extra = defaultExtra || ( margin === true || value === true ? "margin" : "border" );

			return access( this, function( elem, type, value ) {
				var doc;

				if ( jQuery.isWindow( elem ) ) {
					// As of 5/8/2012 this will yield incorrect results for Mobile Safari, but there
					// isn't a whole lot we can do. See pull request at this URL for discussion:
					// https://github.com/jquery/jquery/pull/764
					return elem.document.documentElement[ "client" + name ];
				}

				// Get document width or height
				if ( elem.nodeType === 9 ) {
					doc = elem.documentElement;

					// Either scroll[Width/Height] or offset[Width/Height] or client[Width/Height], whichever is greatest
					// unfortunately, this causes bug #3838 in IE6/8 only, but there is currently no good, small way to fix it.
					return Math.max(
						elem.body[ "scroll" + name ], doc[ "scroll" + name ],
						elem.body[ "offset" + name ], doc[ "offset" + name ],
						doc[ "client" + name ]
					);
				}

				return value === undefined ?
					// Get width or height on the element, requesting but not forcing parseFloat
					jQuery.css( elem, type, extra ) :

					// Set width or height on the element
					jQuery.style( elem, type, value, extra );
			}, type, chainable ? margin : undefined, chainable, null );
		};
	});
});


// The number of elements contained in the matched element set
jQuery.fn.size = function() {
	return this.length;
};

jQuery.fn.andSelf = jQuery.fn.addBack;


// Register as a named AMD module, since jQuery can be concatenated with other
// files that may use define, but not via a proper concatenation script that
// understands anonymous AMD modules. A named AMD is safest and most robust
// way to register. Lowercase jquery is used because AMD module names are
// derived from file names, and jQuery is normally delivered in a lowercase
// file name. Do this after creating the global so that if an AMD module wants
// to call noConflict to hide this version of jQuery, it will work.
if ( typeof define === "function" && define.amd ) {
	define( "jquery", [], function() {
		return jQuery;
	});
}


var
	// Map over jQuery in case of overwrite
	_jQuery = window.jQuery,

	// Map over the $ in case of overwrite
	_$ = window.$;

jQuery.noConflict = function( deep ) {
	if ( window.$ === jQuery ) {
		window.$ = _$;
	}

	if ( deep && window.jQuery === jQuery ) {
		window.jQuery = _jQuery;
	}

	return jQuery;
};

// Expose jQuery and $ identifiers, even in
// AMD (#7102#comment:10, https://github.com/jquery/jquery/pull/557)
// and CommonJS for browser emulators (#13566)
if ( typeof noGlobal === strundefined ) {
	window.jQuery = window.$ = jQuery;
}


return jQuery;

}));
(function($, undefined) {

/**
 * Unobtrusive scripting adapter for jQuery
 * https://github.com/rails/jquery-ujs
 *
 * Requires jQuery 1.7.0 or later.
 *
 * Released under the MIT license
 *
 */

  // Cut down on the number of issues from people inadvertently including jquery_ujs twice
  // by detecting and raising an error when it happens.
  if ( $.rails !== undefined ) {
    $.error('jquery-ujs has already been loaded!');
  }

  // Shorthand to make it a little easier to call public rails functions from within rails.js
  var rails;
  var $document = $(document);

  $.rails = rails = {
    // Link elements bound by jquery-ujs
    linkClickSelector: 'a[data-confirm], a[data-method], a[data-remote], a[data-disable-with]',

    // Button elements bound by jquery-ujs
    buttonClickSelector: 'button[data-remote]',

    // Select elements bound by jquery-ujs
    inputChangeSelector: 'select[data-remote], input[data-remote], textarea[data-remote]',

    // Form elements bound by jquery-ujs
    formSubmitSelector: 'form',

    // Form input elements bound by jquery-ujs
    formInputClickSelector: 'form input[type=submit], form input[type=image], form button[type=submit], form button:not([type])',

    // Form input elements disabled during form submission
    disableSelector: 'input[data-disable-with], button[data-disable-with], textarea[data-disable-with]',

    // Form input elements re-enabled after form submission
    enableSelector: 'input[data-disable-with]:disabled, button[data-disable-with]:disabled, textarea[data-disable-with]:disabled',

    // Form required input elements
    requiredInputSelector: 'input[name][required]:not([disabled]),textarea[name][required]:not([disabled])',

    // Form file input elements
    fileInputSelector: 'input[type=file]',

    // Link onClick disable selector with possible reenable after remote submission
    linkDisableSelector: 'a[data-disable-with]',

    // Make sure that every Ajax request sends the CSRF token
    CSRFProtection: function(xhr) {
      var token = $('meta[name="csrf-token"]').attr('content');
      if (token) xhr.setRequestHeader('X-CSRF-Token', token);
    },

    // making sure that all forms have actual up-to-date token(cached forms contain old one)
    refreshCSRFTokens: function(){
      var csrfToken = $('meta[name=csrf-token]').attr('content');
      var csrfParam = $('meta[name=csrf-param]').attr('content');
      $('form input[name="' + csrfParam + '"]').val(csrfToken);
    },

    // Triggers an event on an element and returns false if the event result is false
    fire: function(obj, name, data) {
      var event = $.Event(name);
      obj.trigger(event, data);
      return event.result !== false;
    },

    // Default confirm dialog, may be overridden with custom confirm dialog in $.rails.confirm
    confirm: function(message) {
      return confirm(message);
    },

    // Default ajax function, may be overridden with custom function in $.rails.ajax
    ajax: function(options) {
      return $.ajax(options);
    },

    // Default way to get an element's href. May be overridden at $.rails.href.
    href: function(element) {
      return element.attr('href');
    },

    // Submits "remote" forms and links with ajax
    handleRemote: function(element) {
      var method, url, data, elCrossDomain, crossDomain, withCredentials, dataType, options;

      if (rails.fire(element, 'ajax:before')) {
        elCrossDomain = element.data('cross-domain');
        crossDomain = elCrossDomain === undefined ? null : elCrossDomain;
        withCredentials = element.data('with-credentials') || null;
        dataType = element.data('type') || ($.ajaxSettings && $.ajaxSettings.dataType);

        if (element.is('form')) {
          method = element.attr('method');
          url = element.attr('action');
          data = element.serializeArray();
          // memoized value from clicked submit button
          var button = element.data('ujs:submit-button');
          if (button) {
            data.push(button);
            element.data('ujs:submit-button', null);
          }
        } else if (element.is(rails.inputChangeSelector)) {
          method = element.data('method');
          url = element.data('url');
          data = element.serialize();
          if (element.data('params')) data = data + "&" + element.data('params');
        } else if (element.is(rails.buttonClickSelector)) {
          method = element.data('method') || 'get';
          url = element.data('url');
          data = element.serialize();
          if (element.data('params')) data = data + "&" + element.data('params');
        } else {
          method = element.data('method');
          url = rails.href(element);
          data = element.data('params') || null;
        }

        options = {
          type: method || 'GET', data: data, dataType: dataType,
          // stopping the "ajax:beforeSend" event will cancel the ajax request
          beforeSend: function(xhr, settings) {
            if (settings.dataType === undefined) {
              xhr.setRequestHeader('accept', '*/*;q=0.5, ' + settings.accepts.script);
            }
            return rails.fire(element, 'ajax:beforeSend', [xhr, settings]);
          },
          success: function(data, status, xhr) {
            element.trigger('ajax:success', [data, status, xhr]);
          },
          complete: function(xhr, status) {
            element.trigger('ajax:complete', [xhr, status]);
          },
          error: function(xhr, status, error) {
            element.trigger('ajax:error', [xhr, status, error]);
          },
          crossDomain: crossDomain
        };

        // There is no withCredentials for IE6-8 when
        // "Enable native XMLHTTP support" is disabled
        if (withCredentials) {
          options.xhrFields = {
            withCredentials: withCredentials
          };
        }

        // Only pass url to `ajax` options if not blank
        if (url) { options.url = url; }

        var jqxhr = rails.ajax(options);
        element.trigger('ajax:send', jqxhr);
        return jqxhr;
      } else {
        return false;
      }
    },

    // Handles "data-method" on links such as:
    // <a href="/users/5" data-method="delete" rel="nofollow" data-confirm="Are you sure?">Delete</a>
    handleMethod: function(link) {
      var href = rails.href(link),
        method = link.data('method'),
        target = link.attr('target'),
        csrfToken = $('meta[name=csrf-token]').attr('content'),
        csrfParam = $('meta[name=csrf-param]').attr('content'),
        form = $('<form method="post" action="' + href + '"></form>'),
        metadataInput = '<input name="_method" value="' + method + '" type="hidden" />';

      if (csrfParam !== undefined && csrfToken !== undefined) {
        metadataInput += '<input name="' + csrfParam + '" value="' + csrfToken + '" type="hidden" />';
      }

      if (target) { form.attr('target', target); }

      form.hide().append(metadataInput).appendTo('body');
      form.submit();
    },

    /* Disables form elements:
      - Caches element value in 'ujs:enable-with' data store
      - Replaces element text with value of 'data-disable-with' attribute
      - Sets disabled property to true
    */
    disableFormElements: function(form) {
      form.find(rails.disableSelector).each(function() {
        var element = $(this), method = element.is('button') ? 'html' : 'val';
        element.data('ujs:enable-with', element[method]());
        element[method](element.data('disable-with'));
        element.prop('disabled', true);
      });
    },

    /* Re-enables disabled form elements:
      - Replaces element text with cached value from 'ujs:enable-with' data store (created in `disableFormElements`)
      - Sets disabled property to false
    */
    enableFormElements: function(form) {
      form.find(rails.enableSelector).each(function() {
        var element = $(this), method = element.is('button') ? 'html' : 'val';
        if (element.data('ujs:enable-with')) element[method](element.data('ujs:enable-with'));
        element.prop('disabled', false);
      });
    },

   /* For 'data-confirm' attribute:
      - Fires `confirm` event
      - Shows the confirmation dialog
      - Fires the `confirm:complete` event

      Returns `true` if no function stops the chain and user chose yes; `false` otherwise.
      Attaching a handler to the element's `confirm` event that returns a `falsy` value cancels the confirmation dialog.
      Attaching a handler to the element's `confirm:complete` event that returns a `falsy` value makes this function
      return false. The `confirm:complete` event is fired whether or not the user answered true or false to the dialog.
   */
    allowAction: function(element) {
      var message = element.data('confirm'),
          answer = false, callback;
      if (!message) { return true; }

      if (rails.fire(element, 'confirm')) {
        answer = rails.confirm(message);
        callback = rails.fire(element, 'confirm:complete', [answer]);
      }
      return answer && callback;
    },

    // Helper function which checks for blank inputs in a form that match the specified CSS selector
    blankInputs: function(form, specifiedSelector, nonBlank) {
      var inputs = $(), input, valueToCheck,
          selector = specifiedSelector || 'input,textarea',
          allInputs = form.find(selector);

      allInputs.each(function() {
        input = $(this);
        valueToCheck = input.is('input[type=checkbox],input[type=radio]') ? input.is(':checked') : input.val();
        // If nonBlank and valueToCheck are both truthy, or nonBlank and valueToCheck are both falsey
        if (!valueToCheck === !nonBlank) {

          // Don't count unchecked required radio if other radio with same name is checked
          if (input.is('input[type=radio]') && allInputs.filter('input[type=radio]:checked[name="' + input.attr('name') + '"]').length) {
            return true; // Skip to next input
          }

          inputs = inputs.add(input);
        }
      });
      return inputs.length ? inputs : false;
    },

    // Helper function which checks for non-blank inputs in a form that match the specified CSS selector
    nonBlankInputs: function(form, specifiedSelector) {
      return rails.blankInputs(form, specifiedSelector, true); // true specifies nonBlank
    },

    // Helper function, needed to provide consistent behavior in IE
    stopEverything: function(e) {
      $(e.target).trigger('ujs:everythingStopped');
      e.stopImmediatePropagation();
      return false;
    },

    //  replace element's html with the 'data-disable-with' after storing original html
    //  and prevent clicking on it
    disableElement: function(element) {
      element.data('ujs:enable-with', element.html()); // store enabled state
      element.html(element.data('disable-with')); // set to disabled state
      element.bind('click.railsDisable', function(e) { // prevent further clicking
        return rails.stopEverything(e);
      });
    },

    // restore element to its original state which was disabled by 'disableElement' above
    enableElement: function(element) {
      if (element.data('ujs:enable-with') !== undefined) {
        element.html(element.data('ujs:enable-with')); // set to old enabled state
        element.removeData('ujs:enable-with'); // clean up cache
      }
      element.unbind('click.railsDisable'); // enable element
    }

  };

  if (rails.fire($document, 'rails:attachBindings')) {

    $.ajaxPrefilter(function(options, originalOptions, xhr){ if ( !options.crossDomain ) { rails.CSRFProtection(xhr); }});

    $document.delegate(rails.linkDisableSelector, 'ajax:complete', function() {
        rails.enableElement($(this));
    });

    $document.delegate(rails.linkClickSelector, 'click.rails', function(e) {
      var link = $(this), method = link.data('method'), data = link.data('params'), metaClick = e.metaKey || e.ctrlKey;
      if (!rails.allowAction(link)) return rails.stopEverything(e);

      if (!metaClick && link.is(rails.linkDisableSelector)) rails.disableElement(link);

      if (link.data('remote') !== undefined) {
        if (metaClick && (!method || method === 'GET') && !data) { return true; }

        var handleRemote = rails.handleRemote(link);
        // response from rails.handleRemote() will either be false or a deferred object promise.
        if (handleRemote === false) {
          rails.enableElement(link);
        } else {
          handleRemote.error( function() { rails.enableElement(link); } );
        }
        return false;

      } else if (link.data('method')) {
        rails.handleMethod(link);
        return false;
      }
    });

    $document.delegate(rails.buttonClickSelector, 'click.rails', function(e) {
      var button = $(this);
      if (!rails.allowAction(button)) return rails.stopEverything(e);

      rails.handleRemote(button);
      return false;
    });

    $document.delegate(rails.inputChangeSelector, 'change.rails', function(e) {
      var link = $(this);
      if (!rails.allowAction(link)) return rails.stopEverything(e);

      rails.handleRemote(link);
      return false;
    });

    $document.delegate(rails.formSubmitSelector, 'submit.rails', function(e) {
      var form = $(this),
        remote = form.data('remote') !== undefined,
        blankRequiredInputs = rails.blankInputs(form, rails.requiredInputSelector),
        nonBlankFileInputs = rails.nonBlankInputs(form, rails.fileInputSelector);

      if (!rails.allowAction(form)) return rails.stopEverything(e);

      // skip other logic when required values are missing or file upload is present
      if (blankRequiredInputs && form.attr("novalidate") == undefined && rails.fire(form, 'ajax:aborted:required', [blankRequiredInputs])) {
        return rails.stopEverything(e);
      }

      if (remote) {
        if (nonBlankFileInputs) {
          // slight timeout so that the submit button gets properly serialized
          // (make it easy for event handler to serialize form without disabled values)
          setTimeout(function(){ rails.disableFormElements(form); }, 13);
          var aborted = rails.fire(form, 'ajax:aborted:file', [nonBlankFileInputs]);

          // re-enable form elements if event bindings return false (canceling normal form submission)
          if (!aborted) { setTimeout(function(){ rails.enableFormElements(form); }, 13); }

          return aborted;
        }

        rails.handleRemote(form);
        return false;

      } else {
        // slight timeout so that the submit button gets properly serialized
        setTimeout(function(){ rails.disableFormElements(form); }, 13);
      }
    });

    $document.delegate(rails.formInputClickSelector, 'click.rails', function(event) {
      var button = $(this);

      if (!rails.allowAction(button)) return rails.stopEverything(event);

      // register the pressed submit button
      var name = button.attr('name'),
        data = name ? {name:name, value:button.val()} : null;

      button.closest('form').data('ujs:submit-button', data);
    });

    $document.delegate(rails.formSubmitSelector, 'ajax:beforeSend.rails', function(event) {
      if (this == event.target) rails.disableFormElements($(this));
    });

    $document.delegate(rails.formSubmitSelector, 'ajax:complete.rails', function(event) {
      if (this == event.target) rails.enableFormElements($(this));
    });

    $(function(){
      rails.refreshCSRFTokens();
    });
  }

})( jQuery );
(function() {
  var CSRFToken, Click, ComponentUrl, Link, browserCompatibleDocumentParser, browserIsntBuggy, browserSupportsCustomEvents, browserSupportsPushState, browserSupportsTurbolinks, bypassOnLoadPopstate, cacheCurrentPage, cacheSize, changePage, constrainPageCacheTo, createDocument, currentState, enableTransitionCache, executeScriptTags, extractTitleAndBody, fetch, fetchHistory, fetchReplacement, historyStateIsDefined, initializeTurbolinks, installDocumentReadyPageEventTriggers, installHistoryChangeHandler, installJqueryAjaxSuccessPageUpdateTrigger, loadedAssets, pageCache, pageChangePrevented, pagesCached, popCookie, processResponse, recallScrollPosition, referer, reflectNewUrl, reflectRedirectedUrl, rememberCurrentState, rememberCurrentUrl, rememberReferer, removeNoscriptTags, requestMethodIsSafe, resetScrollPosition, transitionCacheEnabled, transitionCacheFor, triggerEvent, visit, xhr, _ref,
    __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; },
    __hasProp = {}.hasOwnProperty,
    __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
    __slice = [].slice;

  pageCache = {};

  cacheSize = 10;

  transitionCacheEnabled = false;

  currentState = null;

  loadedAssets = null;

  referer = null;

  createDocument = null;

  xhr = null;

  fetch = function(url) {
    var cachedPage;
    url = new ComponentUrl(url);
    rememberReferer();
    cacheCurrentPage();
    reflectNewUrl(url);
    if (transitionCacheEnabled && (cachedPage = transitionCacheFor(url.absolute))) {
      fetchHistory(cachedPage);
      return fetchReplacement(url);
    } else {
      return fetchReplacement(url, resetScrollPosition);
    }
  };

  transitionCacheFor = function(url) {
    var cachedPage;
    cachedPage = pageCache[url];
    if (cachedPage && !cachedPage.transitionCacheDisabled) {
      return cachedPage;
    }
  };

  enableTransitionCache = function(enable) {
    if (enable == null) {
      enable = true;
    }
    return transitionCacheEnabled = enable;
  };

  fetchReplacement = function(url, onLoadFunction) {
    if (onLoadFunction == null) {
      onLoadFunction = (function(_this) {
        return function() {};
      })(this);
    }
    triggerEvent('page:fetch', {
      url: url.absolute
    });
    if (xhr != null) {
      xhr.abort();
    }
    xhr = new XMLHttpRequest;
    xhr.open('GET', url.withoutHashForIE10compatibility(), true);
    xhr.setRequestHeader('Accept', 'text/html, application/xhtml+xml, application/xml');
    xhr.setRequestHeader('X-XHR-Referer', referer);
    xhr.onload = function() {
      var doc;
      triggerEvent('page:receive');
      if (doc = processResponse()) {
        changePage.apply(null, extractTitleAndBody(doc));
        reflectRedirectedUrl();
        onLoadFunction();
        return triggerEvent('page:load');
      } else {
        return document.location.href = url.absolute;
      }
    };
    xhr.onloadend = function() {
      return xhr = null;
    };
    xhr.onerror = function() {
      return document.location.href = url.absolute;
    };
    return xhr.send();
  };

  fetchHistory = function(cachedPage) {
    if (xhr != null) {
      xhr.abort();
    }
    changePage(cachedPage.title, cachedPage.body);
    recallScrollPosition(cachedPage);
    return triggerEvent('page:restore');
  };

  cacheCurrentPage = function() {
    var currentStateUrl;
    currentStateUrl = new ComponentUrl(currentState.url);
    pageCache[currentStateUrl.absolute] = {
      url: currentStateUrl.relative,
      body: document.body,
      title: document.title,
      positionY: window.pageYOffset,
      positionX: window.pageXOffset,
      cachedAt: new Date().getTime(),
      transitionCacheDisabled: document.querySelector('[data-no-transition-cache]') != null
    };
    return constrainPageCacheTo(cacheSize);
  };

  pagesCached = function(size) {
    if (size == null) {
      size = cacheSize;
    }
    if (/^[\d]+$/.test(size)) {
      return cacheSize = parseInt(size);
    }
  };

  constrainPageCacheTo = function(limit) {
    var cacheTimesRecentFirst, key, pageCacheKeys, _i, _len, _results;
    pageCacheKeys = Object.keys(pageCache);
    cacheTimesRecentFirst = pageCacheKeys.map(function(url) {
      return pageCache[url].cachedAt;
    }).sort(function(a, b) {
      return b - a;
    });
    _results = [];
    for (_i = 0, _len = pageCacheKeys.length; _i < _len; _i++) {
      key = pageCacheKeys[_i];
      if (!(pageCache[key].cachedAt <= cacheTimesRecentFirst[limit])) {
        continue;
      }
      triggerEvent('page:expire', pageCache[key]);
      _results.push(delete pageCache[key]);
    }
    return _results;
  };

  changePage = function(title, body, csrfToken, runScripts) {
    document.title = title;
    document.documentElement.replaceChild(body, document.body);
    if (csrfToken != null) {
      CSRFToken.update(csrfToken);
    }
    if (runScripts) {
      executeScriptTags();
    }
    currentState = window.history.state;
    triggerEvent('page:change');
    return triggerEvent('page:update');
  };

  executeScriptTags = function() {
    var attr, copy, nextSibling, parentNode, script, scripts, _i, _j, _len, _len1, _ref, _ref1;
    scripts = Array.prototype.slice.call(document.body.querySelectorAll('script:not([data-turbolinks-eval="false"])'));
    for (_i = 0, _len = scripts.length; _i < _len; _i++) {
      script = scripts[_i];
      if (!((_ref = script.type) === '' || _ref === 'text/javascript')) {
        continue;
      }
      copy = document.createElement('script');
      _ref1 = script.attributes;
      for (_j = 0, _len1 = _ref1.length; _j < _len1; _j++) {
        attr = _ref1[_j];
        copy.setAttribute(attr.name, attr.value);
      }
      copy.appendChild(document.createTextNode(script.innerHTML));
      parentNode = script.parentNode, nextSibling = script.nextSibling;
      parentNode.removeChild(script);
      parentNode.insertBefore(copy, nextSibling);
    }
  };

  removeNoscriptTags = function(node) {
    node.innerHTML = node.innerHTML.replace(/<noscript[\S\s]*?<\/noscript>/ig, '');
    return node;
  };

  reflectNewUrl = function(url) {
    if ((url = new ComponentUrl(url)).absolute !== referer) {
      return window.history.pushState({
        turbolinks: true,
        url: url.absolute
      }, '', url.absolute);
    }
  };

  reflectRedirectedUrl = function() {
    var location, preservedHash;
    if (location = xhr.getResponseHeader('X-XHR-Redirected-To')) {
      location = new ComponentUrl(location);
      preservedHash = location.hasNoHash() ? document.location.hash : '';
      return window.history.replaceState(currentState, '', location.href + preservedHash);
    }
  };

  rememberReferer = function() {
    return referer = document.location.href;
  };

  rememberCurrentUrl = function() {
    return window.history.replaceState({
      turbolinks: true,
      url: document.location.href
    }, '', document.location.href);
  };

  rememberCurrentState = function() {
    return currentState = window.history.state;
  };

  recallScrollPosition = function(page) {
    return window.scrollTo(page.positionX, page.positionY);
  };

  resetScrollPosition = function() {
    if (document.location.hash) {
      return document.location.href = document.location.href;
    } else {
      return window.scrollTo(0, 0);
    }
  };

  popCookie = function(name) {
    var value, _ref;
    value = ((_ref = document.cookie.match(new RegExp(name + "=(\\w+)"))) != null ? _ref[1].toUpperCase() : void 0) || '';
    document.cookie = name + '=; expires=Thu, 01-Jan-70 00:00:01 GMT; path=/';
    return value;
  };

  triggerEvent = function(name, data) {
    var event;
    event = document.createEvent('Events');
    if (data) {
      event.data = data;
    }
    event.initEvent(name, true, true);
    return document.dispatchEvent(event);
  };

  pageChangePrevented = function() {
    return !triggerEvent('page:before-change');
  };

  processResponse = function() {
    var assetsChanged, clientOrServerError, doc, extractTrackAssets, intersection, validContent;
    clientOrServerError = function() {
      var _ref;
      return (400 <= (_ref = xhr.status) && _ref < 600);
    };
    validContent = function() {
      return xhr.getResponseHeader('Content-Type').match(/^(?:text\/html|application\/xhtml\+xml|application\/xml)(?:;|$)/);
    };
    extractTrackAssets = function(doc) {
      var node, _i, _len, _ref, _results;
      _ref = doc.head.childNodes;
      _results = [];
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        node = _ref[_i];
        if ((typeof node.getAttribute === "function" ? node.getAttribute('data-turbolinks-track') : void 0) != null) {
          _results.push(node.getAttribute('src') || node.getAttribute('href'));
        }
      }
      return _results;
    };
    assetsChanged = function(doc) {
      var fetchedAssets;
      loadedAssets || (loadedAssets = extractTrackAssets(document));
      fetchedAssets = extractTrackAssets(doc);
      return fetchedAssets.length !== loadedAssets.length || intersection(fetchedAssets, loadedAssets).length !== loadedAssets.length;
    };
    intersection = function(a, b) {
      var value, _i, _len, _ref, _results;
      if (a.length > b.length) {
        _ref = [b, a], a = _ref[0], b = _ref[1];
      }
      _results = [];
      for (_i = 0, _len = a.length; _i < _len; _i++) {
        value = a[_i];
        if (__indexOf.call(b, value) >= 0) {
          _results.push(value);
        }
      }
      return _results;
    };
    if (!clientOrServerError() && validContent()) {
      doc = createDocument(xhr.responseText);
      if (doc && !assetsChanged(doc)) {
        return doc;
      }
    }
  };

  extractTitleAndBody = function(doc) {
    var title;
    title = doc.querySelector('title');
    return [title != null ? title.textContent : void 0, removeNoscriptTags(doc.body), CSRFToken.get(doc).token, 'runScripts'];
  };

  CSRFToken = {
    get: function(doc) {
      var tag;
      if (doc == null) {
        doc = document;
      }
      return {
        node: tag = doc.querySelector('meta[name="csrf-token"]'),
        token: tag != null ? typeof tag.getAttribute === "function" ? tag.getAttribute('content') : void 0 : void 0
      };
    },
    update: function(latest) {
      var current;
      current = this.get();
      if ((current.token != null) && (latest != null) && current.token !== latest) {
        return current.node.setAttribute('content', latest);
      }
    }
  };

  browserCompatibleDocumentParser = function() {
    var createDocumentUsingDOM, createDocumentUsingParser, createDocumentUsingWrite, e, testDoc, _ref;
    createDocumentUsingParser = function(html) {
      return (new DOMParser).parseFromString(html, 'text/html');
    };
    createDocumentUsingDOM = function(html) {
      var doc;
      doc = document.implementation.createHTMLDocument('');
      doc.documentElement.innerHTML = html;
      return doc;
    };
    createDocumentUsingWrite = function(html) {
      var doc;
      doc = document.implementation.createHTMLDocument('');
      doc.open('replace');
      doc.write(html);
      doc.close();
      return doc;
    };
    try {
      if (window.DOMParser) {
        testDoc = createDocumentUsingParser('<html><body><p>test');
        return createDocumentUsingParser;
      }
    } catch (_error) {
      e = _error;
      testDoc = createDocumentUsingDOM('<html><body><p>test');
      return createDocumentUsingDOM;
    } finally {
      if ((testDoc != null ? (_ref = testDoc.body) != null ? _ref.childNodes.length : void 0 : void 0) !== 1) {
        return createDocumentUsingWrite;
      }
    }
  };

  ComponentUrl = (function() {
    function ComponentUrl(original) {
      this.original = original != null ? original : document.location.href;
      if (this.original.constructor === ComponentUrl) {
        return this.original;
      }
      this._parse();
    }

    ComponentUrl.prototype.withoutHash = function() {
      return this.href.replace(this.hash, '');
    };

    ComponentUrl.prototype.withoutHashForIE10compatibility = function() {
      return this.withoutHash();
    };

    ComponentUrl.prototype.hasNoHash = function() {
      return this.hash.length === 0;
    };

    ComponentUrl.prototype._parse = function() {
      var _ref;
      (this.link != null ? this.link : this.link = document.createElement('a')).href = this.original;
      _ref = this.link, this.href = _ref.href, this.protocol = _ref.protocol, this.host = _ref.host, this.hostname = _ref.hostname, this.port = _ref.port, this.pathname = _ref.pathname, this.search = _ref.search, this.hash = _ref.hash;
      this.origin = [this.protocol, '//', this.hostname].join('');
      if (this.port.length !== 0) {
        this.origin += ":" + this.port;
      }
      this.relative = [this.pathname, this.search, this.hash].join('');
      return this.absolute = this.href;
    };

    return ComponentUrl;

  })();

  Link = (function(_super) {
    __extends(Link, _super);

    Link.HTML_EXTENSIONS = ['html'];

    Link.allowExtensions = function() {
      var extension, extensions, _i, _len;
      extensions = 1 <= arguments.length ? __slice.call(arguments, 0) : [];
      for (_i = 0, _len = extensions.length; _i < _len; _i++) {
        extension = extensions[_i];
        Link.HTML_EXTENSIONS.push(extension);
      }
      return Link.HTML_EXTENSIONS;
    };

    function Link(link) {
      this.link = link;
      if (this.link.constructor === Link) {
        return this.link;
      }
      this.original = this.link.href;
      Link.__super__.constructor.apply(this, arguments);
    }

    Link.prototype.shouldIgnore = function() {
      return this._crossOrigin() || this._anchored() || this._nonHtml() || this._optOut() || this._target();
    };

    Link.prototype._crossOrigin = function() {
      return this.origin !== (new ComponentUrl).origin;
    };

    Link.prototype._anchored = function() {
      var current;
      return ((this.hash && this.withoutHash()) === (current = new ComponentUrl).withoutHash()) || (this.href === current.href + '#');
    };

    Link.prototype._nonHtml = function() {
      return this.pathname.match(/\.[a-z]+$/g) && !this.pathname.match(new RegExp("\\.(?:" + (Link.HTML_EXTENSIONS.join('|')) + ")?$", 'g'));
    };

    Link.prototype._optOut = function() {
      var ignore, link;
      link = this.link;
      while (!(ignore || link === document)) {
        ignore = link.getAttribute('data-no-turbolink') != null;
        link = link.parentNode;
      }
      return ignore;
    };

    Link.prototype._target = function() {
      return this.link.target.length !== 0;
    };

    return Link;

  })(ComponentUrl);

  Click = (function() {
    Click.installHandlerLast = function(event) {
      if (!event.defaultPrevented) {
        document.removeEventListener('click', Click.handle, false);
        return document.addEventListener('click', Click.handle, false);
      }
    };

    Click.handle = function(event) {
      return new Click(event);
    };

    function Click(event) {
      this.event = event;
      if (this.event.defaultPrevented) {
        return;
      }
      this._extractLink();
      if (this._validForTurbolinks()) {
        if (!pageChangePrevented()) {
          visit(this.link.href);
        }
        this.event.preventDefault();
      }
    }

    Click.prototype._extractLink = function() {
      var link;
      link = this.event.target;
      while (!(!link.parentNode || link.nodeName === 'A')) {
        link = link.parentNode;
      }
      if (link.nodeName === 'A' && link.href.length !== 0) {
        return this.link = new Link(link);
      }
    };

    Click.prototype._validForTurbolinks = function() {
      return (this.link != null) && !(this.link.shouldIgnore() || this._nonStandardClick());
    };

    Click.prototype._nonStandardClick = function() {
      return this.event.which > 1 || this.event.metaKey || this.event.ctrlKey || this.event.shiftKey || this.event.altKey;
    };

    return Click;

  })();

  bypassOnLoadPopstate = function(fn) {
    return setTimeout(fn, 500);
  };

  installDocumentReadyPageEventTriggers = function() {
    return document.addEventListener('DOMContentLoaded', (function() {
      triggerEvent('page:change');
      return triggerEvent('page:update');
    }), true);
  };

  installJqueryAjaxSuccessPageUpdateTrigger = function() {
    if (typeof jQuery !== 'undefined') {
      return jQuery(document).on('ajaxSuccess', function(event, xhr, settings) {
        if (!jQuery.trim(xhr.responseText)) {
          return;
        }
        return triggerEvent('page:update');
      });
    }
  };

  installHistoryChangeHandler = function(event) {
    var cachedPage, _ref;
    if ((_ref = event.state) != null ? _ref.turbolinks : void 0) {
      if (cachedPage = pageCache[(new ComponentUrl(event.state.url)).absolute]) {
        cacheCurrentPage();
        return fetchHistory(cachedPage);
      } else {
        return visit(event.target.location.href);
      }
    }
  };

  initializeTurbolinks = function() {
    rememberCurrentUrl();
    rememberCurrentState();
    createDocument = browserCompatibleDocumentParser();
    document.addEventListener('click', Click.installHandlerLast, true);
    return bypassOnLoadPopstate(function() {
      return window.addEventListener('popstate', installHistoryChangeHandler, false);
    });
  };

  historyStateIsDefined = window.history.state !== void 0 || navigator.userAgent.match(/Firefox\/2[6|7]/);

  browserSupportsPushState = window.history && window.history.pushState && window.history.replaceState && historyStateIsDefined;

  browserIsntBuggy = !navigator.userAgent.match(/CriOS\//);

  requestMethodIsSafe = (_ref = popCookie('request_method')) === 'GET' || _ref === '';

  browserSupportsTurbolinks = browserSupportsPushState && browserIsntBuggy && requestMethodIsSafe;

  browserSupportsCustomEvents = document.addEventListener && document.createEvent;

  if (browserSupportsCustomEvents) {
    installDocumentReadyPageEventTriggers();
    installJqueryAjaxSuccessPageUpdateTrigger();
  }

  if (browserSupportsTurbolinks) {
    visit = fetch;
    initializeTurbolinks();
  } else {
    visit = function(url) {
      return document.location.href = url;
    };
  }

  this.Turbolinks = {
    visit: visit,
    pagesCached: pagesCached,
    enableTransitionCache: enableTransitionCache,
    allowLinkExtensions: Link.allowExtensions,
    supported: browserSupportsTurbolinks
  };

}).call(this);
Blacklight = function() {
  var buffer = new Array;
  return {
    onLoad: function(func) {
      buffer.push(func);
    },

    activate: function() {
      for(var i = 0; i < buffer.length; i++) {
        buffer[i].call();
      }
    }
  }
}();

// turbolinks triggers page:load events on page transition
// If app isn't using turbolinks, this event will never be triggered, no prob. 
$(document).on('page:load', function() {
  Blacklight.activate();  
});

$(document).ready(function() {
  Blacklight.activate();  
});

(function($) {
  Blacklight.do_search_autofocus_fallback = function() {
    if (typeof Modernizer != "undefined") {
      if (Modernizr.autofocus) {
        return;
      }
    }

    $('input[autofocus]').focus();
  }

  Blacklight.onLoad(function() {
    Blacklight.do_search_autofocus_fallback();
  });
})(jQuery);
/* A JQuery plugin (should this be implemented as a widget instead? not sure)
   that will convert a "toggle" form, with single submit button to add/remove
   something, like used for Bookmarks, into an AJAXy checkbox instead. 
   
   Apply to a form. Does require certain assumption about the form:
    1) The same form 'action' href must be used for both ADD and REMOVE
       actions, with the different being the hidden input name="_method"
       being set to "put" or "delete" -- that's the Rails method to pretend
       to be doing a certain HTTP verb. So same URL, PUT to add, DELETE
       to remove. This plugin assumes that. 
       
       Plus, the form this is applied to should provide a data-doc-id 
       attribute (HTML5-style doc-*) that contains the id/primary key
       of the object in question -- used by plugin for a unique value for
       DOM id's. 
       
   Pass in options for your class name and labels:
   $("form.something").bl_checkbox_submit({    
        checked_label: "Selected",
        unchecked_label: "Select",
        progress_label: "Saving...",
        //css_class is added to elements added, plus used for id base
        css_class: "toggle_my_kinda_form",
        success: function(after_success_check_state) {
          #optional callback
        }
   });
*/

(function($) {    
    $.fn.bl_checkbox_submit = function(arg_opts) {              
      
      this.each(function() {
        var options = $.extend({}, $.fn.bl_checkbox_submit.defaults, arg_opts);
                                  
          
        var form = $(this);
        form.children().hide();
        //We're going to use the existing form to actually send our add/removes
        //This works conveneintly because the exact same action href is used
        //for both bookmarks/$doc_id.  But let's take out the irrelevant parts
        //of the form to avoid any future confusion. 
        form.find("input[type=submit]").remove();
        form.addClass('form-horizontal');
        
        //View needs to set data-doc-id so we know a unique value
        //for making DOM id
        var unique_id = form.attr("data-doc-id") || Math.random();
        // if form is currently using method delete to change state, 
        // then checkbox is currently checked
        var checked = (form.find("input[name=_method][value=delete]").size() != 0);
            
        var checkbox = $('<input type="checkbox">')	    
          .addClass( options.css_class )
          .attr("id", options.css_class + "_" + unique_id);	  
        var label = $('<label>')
          .addClass( options.css_class )
          .addClass('checkbox')
          .attr("for", options.css_class + '_' + unique_id)
          .attr("title", form.attr("title") || "");
        var span = $('<span>');

        label.append(checkbox);
        label.append(" ");
        label.append(span);  
          
        function update_state_for(state) {
            checkbox.prop("checked", state);
            label.toggleClass("checked", state);
            if (state) {    
               //Set the Rails hidden field that fakes an HTTP verb
               //properly for current state action. 
               form.find("input[name=_method]").val("delete");
               span.text(form.attr('data-present'));
            } else {
               form.find("input[name=_method]").val("put");
               span.text(form.attr('data-absent'));
            }
          }
        
        form.append(label);
        update_state_for(checked);
        
        checkbox.click(function() {
            span.text(form.attr('data-inprogress'));
            label.attr("disabled", "disabled");  
            checkbox.attr("disabled", "disabled");
                            
            $.ajax({
                url: form.attr("action"),
                dataType: 'json',
                type: form.attr("method").toUpperCase(),
                data: form.serialize(),
                error: function() {
                   alert("Error");
                   update_state_for(checked);
                   label.removeAttr("disabled");
                   checkbox.removeAttr("disabled");
                },
                success: function(data, status, xhr) {
                  //if app isn't running at all, xhr annoyingly
                  //reports success with status 0. 
                  if (xhr.status != 0) {
                    checked = ! checked;
                    update_state_for(checked);
                    label.removeAttr("disabled");
                    checkbox.removeAttr("disabled");
                    options.success.call(form, checked);
                  } else {
                    alert("Error");
                    update_state_for(checked);
                    label.removeAttr("disabled");
                    checkbox.removeAttr("disabled");
                  }
                }
            });
            
            return false;
        }); //checkbox.click
        
        
      }); //this.each      
      return this;
    };
	
  $.fn.bl_checkbox_submit.defaults =  {
            //css_class is added to elements added, plus used for id base
            css_class: "bl_checkbox_submit",
            success: function() {} //callback
  };
})(jQuery);


(function($) {
//change form submit toggle to checkbox
    Blacklight.do_bookmark_toggle_behavior = function() {
      $(Blacklight.do_bookmark_toggle_behavior.selector).bl_checkbox_submit({
          //css_class is added to elements added, plus used for id base
          css_class: "toggle_bookmark"    
      }); 
    };
    Blacklight.do_bookmark_toggle_behavior.selector = "form.bookmark_toggle"; 

Blacklight.onLoad(function() {
  Blacklight.do_bookmark_toggle_behavior();  
});
  

})(jQuery);


/* 
  The ajax_modal plugin can display some interactions inside a Bootstrap
  modal window, including some multi-page interactions. 

  It supports unobtrusive Javascript, where a link or form that would have caused
  a new page load is changed to display it's results inside a modal dialog,
  by this plugin.  The plugin assumes there is a Bootstrap modal div
  on the page with id #ajax-modal to use as the modal -- the standard Blacklight
  layout provides this. 

  To make a link or form have their results display inside a modal, add
  `data-ajax-modal="trigger"` to the link or form. (Note, form itself not submit input)
  With Rails link_to helper, you'd do that like:

      link_to something, link, :data => {:ajax_modal => "trigger"}

  The results of the link href or form submit will be displayed inside
  a modal -- they should include the proper HTML markup for a bootstrap modal's
  contents. Also, you ordinarily won't want the Rails template with wrapping
  navigational elements to be used.  The Rails controller could suppress
  the layout when a JS AJAX request is detected, OR the response
  can include a `<div data-ajax-modal="container">` -- only the contents
  of the container will be placed inside the modal, the rest of the
  page will be ignored. 

  If you'd like to have a link or button that closes the modal,
  you can just add a `data-dismiss="modal"` to the link,
  standard Bootstrap convention. But you can also have
  an href on this link for non-JS contexts, we'll make sure
  inside the modal it closes the modal and the link is NOT followed. 

  Link or forms inside the modal will ordinarily cause page loads
  when they are triggered. However, if you'd like their results
  to stay within the modal, just add `data-ajax-modal="preserve"`
  to the link or form. 

  Here's an example of what might be returned, demonstrating most of the devices available:

    <div data-ajax-modal="container">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-hidden="true">Ã—</button>
        <h3 class="modal-title">Request Placed</h3>
      </div>
  
      <div class="modal-body">
        <p>Some message</p>
        <%= link_to "This result will still be within modal", some_link, :data => {:ajax_modal => "preserve"} %>
      </div>


      <div class="modal-footer">
        <%= link_to "Close the modal", request_done_path, :class => "submit button dialog-close", :data => {:dismiss => "modal"} %>
      </div>
    </div>


  One additional feature. If the content returned from the AJAX modal load
  has an element with `data-ajax-modal=close`, that will trigger the modal
  to be closed. And if this element includes a node with class "flash_messages",
  the flash-messages node will be added to the main page inside #main-flahses. 

  == Events

  We'll send out an event 'loaded.blacklight.ajax-modal' with the #ajax-modal
  dialog as the target, right after content is loaded into the modal but before
  it is shown (if not already a shown modal).  In an event handler, you can 
  inspect loaded content by looking inside $(this).  If you call event.preventDefault(),
  we won't 'show' the dialog (although it may already have been shown, you may want to
  $(this).modal("hide") if you want to ensure hidden/closed. 

  The data-ajax-modal=close behavior is implemented with this event, see for example. 
*/

// We keep all our data in Blacklight.ajaxModal object. 
// Create lazily if someone else created first. 
if (Blacklight.ajaxModal === undefined) {
  Blacklight.ajaxModal = {};
}


// a Bootstrap modal div that should be already on the page hidden
Blacklight.ajaxModal.modalSelector = "#ajax-modal";

// Trigger selectors identify forms or hyperlinks that should open
// inside a modal dialog.
Blacklight.ajaxModal.triggerLinkSelector  = "a[data-ajax-modal~=trigger], a.lightboxLink,a.more_facets_link,.ajax_modal_launch";
Blacklight.ajaxModal.triggerFormSelector  = "form[data-ajax-modal~=trigger], form.ajax_form";

// preserve selectors identify forms or hyperlinks that, if activated already
// inside a modal dialog, should have destinations remain inside the modal -- but
// won't trigger a modal if not already in one.
//
// No need to repeat selectors from trigger selectors, those will already
// be preserved. MUST be manually prefixed with the modal selector,
// so they only apply to things inside a modal.
Blacklight.ajaxModal.preserveLinkSelector = Blacklight.ajaxModal.modalSelector + ' a[data-ajax-modal~=preserve]';
Blacklight.ajaxModal.preserveFormSelector = Blacklight.ajaxModal.modalSelector + ' form[data-ajax-modal~=preserve]'

Blacklight.ajaxModal.containerSelector    = "[data-ajax-modal~=container]";

Blacklight.ajaxModal.modalCloseSelector   = "[data-ajax-modal~=close], span.ajax-close-modal";

Blacklight.ajaxModal.receiveAjax = function (data) {
      var contents = data.responseText;

      // does it have a data- selector for container?
      // important we don't execute script tags, we shouldn't. 
      // code modelled off of JQuery ajax.load. https://github.com/jquery/jquery/blob/master/src/ajax/load.js?source=c#L62
      var container =  $("<div>").
        append( jQuery.parseHTML(contents) ).find( Blacklight.ajaxModal.containerSelector ).first();
      if (container.size() !== 0) {
        contents = container.html();
      }

      $(Blacklight.ajaxModal.modalSelector).find('.modal-content').html(contents);

      // send custom event with the modal dialog div as the target
      var e    = $.Event('loaded.blacklight.ajax-modal')
      $(Blacklight.ajaxModal.modalSelector).trigger(e);
      // if they did preventDefault, don't show the dialog
      if (e.isDefaultPrevented()) return;

      $(Blacklight.ajaxModal.modalSelector).modal('show');      
};


Blacklight.ajaxModal.modalAjaxLinkClick = function(e) {
  e.preventDefault();

  var jqxhr = $.ajax({
    url: $(this).attr('href'),
    dataType: 'script'
  });

  jqxhr.always( Blacklight.ajaxModal.receiveAjax );
};

Blacklight.ajaxModal.modalAjaxFormSubmit = function(e) {
  e.preventDefault();

  var jqxhr = $.ajax({
    url: $(this).attr('action'),
    data: $(this).serialize(),
    type: $(this).attr('method'), //POST',
    dataType: 'script'
 });

 jqxhr.always(Blacklight.ajaxModal.receiveAjax);
}


Blacklight.ajaxModal.setup_modal = function() {
	// Event indicating blacklight is setting up a modal link,
  // you can catch it and call e.preventDefault() to abort
  // setup. 
	var e = $.Event('setup.blacklight.ajax-modal');
	$("body").trigger(e);
	if (e.isDefaultPrevented()) return;

  // Register both trigger and preserve selectors in ONE event handler, combining
  // into one selector with a comma, so if something matches BOTH selectors, it
  // still only gets the event handler called once. 
  $("body").on("click", Blacklight.ajaxModal.triggerLinkSelector  + ", " + Blacklight.ajaxModal.preserveLinkSelector,
    Blacklight.ajaxModal.modalAjaxLinkClick);
  $("body").on("submit", Blacklight.ajaxModal.triggerFormSelector + ", " + Blacklight.ajaxModal.preserveFormSelector,
    Blacklight.ajaxModal.modalAjaxFormSubmit);

  // Catch our own custom loaded event to implement data-ajax-modal=closed
  $("body").on("loaded.blacklight.ajax-modal", Blacklight.ajaxModal.check_close_ajax_modal);

  // we support doing data-dismiss=modal on a <a> with a href for non-ajax
  // use, we need to suppress following the a's href that's there for
  // non-JS contexts. 
  $("body ").on("click", Blacklight.ajaxModal.modalSelector + " a[data-dismiss~=modal]", function (e) {
    e.preventDefault();
  });
};

// A function used as an event handler on loaded.blacklight.ajax-modal
// to catch contained data-ajax-modal=closed directions
Blacklight.ajaxModal.check_close_ajax_modal = function(event) {  
  if ($(event.target).find(Blacklight.ajaxModal.modalCloseSelector).length) {
    modal_flashes = $(this).find('.flash_messages');

    $(event.target).modal("hide");
    event.preventDefault();

    main_flashes = $('#main-flashes');
    main_flashes.append(modal_flashes);
    modal_flashes.fadeIn(500);  
  }
}

Blacklight.onLoad(function() {  
  Blacklight.ajaxModal.setup_modal();
});
(function($) {
  Blacklight.do_search_context_behavior = function() {
    $('a[data-context-href]').on('click.search-context', Blacklight.handleSearchContextMethod);
  };

  // this is the $.rails.handleMethod with a couple adjustments, described inline:
  // first, we're attaching this directly to the event handler, so we can check for meta-keys
  Blacklight.handleSearchContextMethod = function(event) {
    var link = $(this);

    // instead of using the normal href, we need to use the context href instead
    var href = link.data('context-href'),
      method = 'post',
      target = link.attr('target'),
      csrfToken = $('meta[name=csrf-token]').attr('content'),
      csrfParam = $('meta[name=csrf-param]').attr('content'),
      form = $('<form method="post" action="' + href + '"></form>'),
      metadataInput = '<input name="_method" value="' + method + '" type="hidden" />',
      redirectHref = '<input name="redirect" value="' + link.attr('href') + '" type="hidden" />';

    // check for meta keys.. if set, we should open in a new tab
    if(event.metaKey || event.ctrlKey) {
      target = '_blank';
    }

    if (csrfParam !== undefined && csrfToken !== undefined) {
      metadataInput += '<input name="' + csrfParam + '" value="' + csrfToken + '" type="hidden" />';
    }

    if (target) { form.attr('target', target); }

    form.hide().append(metadataInput).append(redirectHref).appendTo('body');
    form.submit();

    return false;
  };

  Blacklight.onLoad(function() {
    Blacklight.do_search_context_behavior();
  });
})(jQuery);
(function($) {
  Blacklight.onLoad(function() {
    // when clicking on a link that toggles the collapsing behavior, don't do anything
    // with the hash or the page could jump around.
    $(document).on("click", "a[data-toggle=collapse][href='#'], [data-toggle=collapse] a[href='#']", function(event) {
      event.preventDefault();
    });
  });
})(jQuery);
/* ========================================================================
 * Bootstrap: transition.js v3.1.1
 * http://getbootstrap.com/javascript/#transitions
 * ========================================================================
 * Copyright 2011-2014 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * ======================================================================== */


+function ($) {
  'use strict';

  // CSS TRANSITION SUPPORT (Shoutout: http://www.modernizr.com/)
  // ============================================================

  function transitionEnd() {
    var el = document.createElement('bootstrap')

    var transEndEventNames = {
      WebkitTransition : 'webkitTransitionEnd',
      MozTransition    : 'transitionend',
      OTransition      : 'oTransitionEnd otransitionend',
      transition       : 'transitionend'
    }

    for (var name in transEndEventNames) {
      if (el.style[name] !== undefined) {
        return { end: transEndEventNames[name] }
      }
    }

    return false // explicit for ie8 (  ._.)
  }

  // http://blog.alexmaccaw.com/css-transitions
  $.fn.emulateTransitionEnd = function (duration) {
    var called = false, $el = this
    $(this).one($.support.transition.end, function () { called = true })
    var callback = function () { if (!called) $($el).trigger($.support.transition.end) }
    setTimeout(callback, duration)
    return this
  }

  $(function () {
    $.support.transition = transitionEnd()
  })

}(jQuery);
/* ========================================================================
 * Bootstrap: collapse.js v3.1.1
 * http://getbootstrap.com/javascript/#collapse
 * ========================================================================
 * Copyright 2011-2014 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * ======================================================================== */


+function ($) {
  'use strict';

  // COLLAPSE PUBLIC CLASS DEFINITION
  // ================================

  var Collapse = function (element, options) {
    this.$element      = $(element)
    this.options       = $.extend({}, Collapse.DEFAULTS, options)
    this.transitioning = null

    if (this.options.parent) this.$parent = $(this.options.parent)
    if (this.options.toggle) this.toggle()
  }

  Collapse.DEFAULTS = {
    toggle: true
  }

  Collapse.prototype.dimension = function () {
    var hasWidth = this.$element.hasClass('width')
    return hasWidth ? 'width' : 'height'
  }

  Collapse.prototype.show = function () {
    if (this.transitioning || this.$element.hasClass('in')) return

    var startEvent = $.Event('show.bs.collapse')
    this.$element.trigger(startEvent)
    if (startEvent.isDefaultPrevented()) return

    var actives = this.$parent && this.$parent.find('> .panel > .in')

    if (actives && actives.length) {
      var hasData = actives.data('bs.collapse')
      if (hasData && hasData.transitioning) return
      actives.collapse('hide')
      hasData || actives.data('bs.collapse', null)
    }

    var dimension = this.dimension()

    this.$element
      .removeClass('collapse')
      .addClass('collapsing')[dimension](0)

    this.transitioning = 1

    var complete = function (e) {
      if (e && e.target != this.$element[0]) {
        this.$element
          .one($.support.transition.end, $.proxy(complete, this))
        return
      }
      this.$element
        .removeClass('collapsing')
        .addClass('collapse in')[dimension]('auto')
      this.transitioning = 0
      this.$element.trigger('shown.bs.collapse')
    }

    if (!$.support.transition) return complete.call(this)

    var scrollSize = $.camelCase(['scroll', dimension].join('-'))

    this.$element
      .one($.support.transition.end, $.proxy(complete, this))
      .emulateTransitionEnd(350)[dimension](this.$element[0][scrollSize])
  }

  Collapse.prototype.hide = function () {
    if (this.transitioning || !this.$element.hasClass('in')) return

    var startEvent = $.Event('hide.bs.collapse')
    this.$element.trigger(startEvent)
    if (startEvent.isDefaultPrevented()) return

    var dimension = this.dimension()

    this.$element[dimension](this.$element[dimension]())[0].offsetHeight

    this.$element
      .addClass('collapsing')
      .removeClass('collapse')
      .removeClass('in')

    this.transitioning = 1

    var complete = function (e) {
      if (e && e.target != this.$element[0]) {
        this.$element
          .one($.support.transition.end, $.proxy(complete, this))
        return
      }
      this.transitioning = 0
      this.$element
        .trigger('hidden.bs.collapse')
        .removeClass('collapsing')
        .addClass('collapse')
    }

    if (!$.support.transition) return complete.call(this)

    this.$element
      [dimension](0)
      .one($.support.transition.end, $.proxy(complete, this))
      .emulateTransitionEnd(350)
  }

  Collapse.prototype.toggle = function () {
    this[this.$element.hasClass('in') ? 'hide' : 'show']()
  }


  // COLLAPSE PLUGIN DEFINITION
  // ==========================

  var old = $.fn.collapse

  $.fn.collapse = function (option) {
    return this.each(function () {
      var $this   = $(this)
      var data    = $this.data('bs.collapse')
      var options = $.extend({}, Collapse.DEFAULTS, $this.data(), typeof option == 'object' && option)

      if (!data && options.toggle && option == 'show') option = !option
      if (!data) $this.data('bs.collapse', (data = new Collapse(this, options)))
      if (typeof option == 'string') data[option]()
    })
  }

  $.fn.collapse.Constructor = Collapse


  // COLLAPSE NO CONFLICT
  // ====================

  $.fn.collapse.noConflict = function () {
    $.fn.collapse = old
    return this
  }


  // COLLAPSE DATA-API
  // =================

  $(document).on('click.bs.collapse.data-api', '[data-toggle="collapse"]', function (e) {
    var $this   = $(this), href
    var target  = $this.attr('data-target')
        || e.preventDefault()
        || (href = $this.attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '') //strip for ie7
    var $target = $(target)
    var data    = $target.data('bs.collapse')
    var option  = data ? 'toggle' : $this.data()
    var parent  = $this.attr('data-parent')
    var $parent = parent && $(parent)

    if (!data || !data.transitioning) {
      if ($parent) $parent.find('[data-toggle="collapse"][data-parent="' + parent + '"]').not($this).addClass('collapsed')
      $this[$target.hasClass('in') ? 'addClass' : 'removeClass']('collapsed')
    }

    $target.collapse(option)
  })

}(jQuery);
/* ========================================================================
 * Bootstrap: dropdown.js v3.1.1
 * http://getbootstrap.com/javascript/#dropdowns
 * ========================================================================
 * Copyright 2011-2014 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * ======================================================================== */


+function ($) {
  'use strict';

  // DROPDOWN CLASS DEFINITION
  // =========================

  var backdrop = '.dropdown-backdrop'
  var toggle   = '[data-toggle="dropdown"]'
  var Dropdown = function (element) {
    $(element).on('click.bs.dropdown', this.toggle)
  }

  Dropdown.prototype.toggle = function (e) {
    var $this = $(this)

    if ($this.is('.disabled, :disabled')) return

    var $parent  = getParent($this)
    var isActive = $parent.hasClass('open')

    clearMenus()

    if (!isActive) {
      if ('ontouchstart' in document.documentElement && !$parent.closest('.navbar-nav').length) {
        // if mobile we use a backdrop because click events don't delegate
        $('<div class="dropdown-backdrop"/>').insertAfter($(this)).on('click', clearMenus)
      }

      var relatedTarget = { relatedTarget: this }
      $parent.trigger(e = $.Event('show.bs.dropdown', relatedTarget))

      if (e.isDefaultPrevented()) return

      $this.trigger('focus')

      $parent
        .toggleClass('open')
        .trigger('shown.bs.dropdown', relatedTarget)
    }

    return false
  }

  Dropdown.prototype.keydown = function (e) {
    if (!/(38|40|27)/.test(e.keyCode)) return

    var $this = $(this)

    e.preventDefault()
    e.stopPropagation()

    if ($this.is('.disabled, :disabled')) return

    var $parent  = getParent($this)
    var isActive = $parent.hasClass('open')

    if (!isActive || (isActive && e.keyCode == 27)) {
      if (e.which == 27) $parent.find(toggle).trigger('focus')
      return $this.trigger('click')
    }

    var desc = ' li:not(.divider):visible a'
    var $items = $parent.find('[role="menu"]' + desc + ', [role="listbox"]' + desc)

    if (!$items.length) return

    var index = $items.index($items.filter(':focus'))

    if (e.keyCode == 38 && index > 0)                 index--                        // up
    if (e.keyCode == 40 && index < $items.length - 1) index++                        // down
    if (!~index)                                      index = 0

    $items.eq(index).trigger('focus')
  }

  function clearMenus(e) {
    $(backdrop).remove()
    $(toggle).each(function () {
      var $parent = getParent($(this))
      var relatedTarget = { relatedTarget: this }
      if (!$parent.hasClass('open')) return
      $parent.trigger(e = $.Event('hide.bs.dropdown', relatedTarget))
      if (e.isDefaultPrevented()) return
      $parent.removeClass('open').trigger('hidden.bs.dropdown', relatedTarget)
    })
  }

  function getParent($this) {
    var selector = $this.attr('data-target')

    if (!selector) {
      selector = $this.attr('href')
      selector = selector && /#[A-Za-z]/.test(selector) && selector.replace(/.*(?=#[^\s]*$)/, '') //strip for ie7
    }

    var $parent = selector && $(selector)

    return $parent && $parent.length ? $parent : $this.parent()
  }


  // DROPDOWN PLUGIN DEFINITION
  // ==========================

  var old = $.fn.dropdown

  $.fn.dropdown = function (option) {
    return this.each(function () {
      var $this = $(this)
      var data  = $this.data('bs.dropdown')

      if (!data) $this.data('bs.dropdown', (data = new Dropdown(this)))
      if (typeof option == 'string') data[option].call($this)
    })
  }

  $.fn.dropdown.Constructor = Dropdown


  // DROPDOWN NO CONFLICT
  // ====================

  $.fn.dropdown.noConflict = function () {
    $.fn.dropdown = old
    return this
  }


  // APPLY TO STANDARD DROPDOWN ELEMENTS
  // ===================================

  $(document)
    .on('click.bs.dropdown.data-api', clearMenus)
    .on('click.bs.dropdown.data-api', '.dropdown form', function (e) { e.stopPropagation() })
    .on('click.bs.dropdown.data-api', toggle, Dropdown.prototype.toggle)
    .on('keydown.bs.dropdown.data-api', toggle + ', [role="menu"], [role="listbox"]', Dropdown.prototype.keydown)

}(jQuery);
/* ========================================================================
 * Bootstrap: alert.js v3.1.1
 * http://getbootstrap.com/javascript/#alerts
 * ========================================================================
 * Copyright 2011-2014 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * ======================================================================== */


+function ($) {
  'use strict';

  // ALERT CLASS DEFINITION
  // ======================

  var dismiss = '[data-dismiss="alert"]'
  var Alert   = function (el) {
    $(el).on('click', dismiss, this.close)
  }

  Alert.prototype.close = function (e) {
    var $this    = $(this)
    var selector = $this.attr('data-target')

    if (!selector) {
      selector = $this.attr('href')
      selector = selector && selector.replace(/.*(?=#[^\s]*$)/, '') // strip for ie7
    }

    var $parent = $(selector)

    if (e) e.preventDefault()

    if (!$parent.length) {
      $parent = $this.hasClass('alert') ? $this : $this.parent()
    }

    $parent.trigger(e = $.Event('close.bs.alert'))

    if (e.isDefaultPrevented()) return

    $parent.removeClass('in')

    function removeElement() {
      $parent.trigger('closed.bs.alert').remove()
    }

    $.support.transition && $parent.hasClass('fade') ?
      $parent
        .one($.support.transition.end, removeElement)
        .emulateTransitionEnd(150) :
      removeElement()
  }


  // ALERT PLUGIN DEFINITION
  // =======================

  var old = $.fn.alert

  $.fn.alert = function (option) {
    return this.each(function () {
      var $this = $(this)
      var data  = $this.data('bs.alert')

      if (!data) $this.data('bs.alert', (data = new Alert(this)))
      if (typeof option == 'string') data[option].call($this)
    })
  }

  $.fn.alert.Constructor = Alert


  // ALERT NO CONFLICT
  // =================

  $.fn.alert.noConflict = function () {
    $.fn.alert = old
    return this
  }


  // ALERT DATA-API
  // ==============

  $(document).on('click.bs.alert.data-api', dismiss, Alert.prototype.close)

}(jQuery);
/* ========================================================================
 * Bootstrap: modal.js v3.1.1
 * http://getbootstrap.com/javascript/#modals
 * ========================================================================
 * Copyright 2011-2014 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * ======================================================================== */


+function ($) {
  'use strict';

  // MODAL CLASS DEFINITION
  // ======================

  var Modal = function (element, options) {
    this.options        = options
    this.$body          = $(document.body)
    this.$element       = $(element)
    this.$backdrop      =
    this.isShown        = null
    this.scrollbarWidth = 0

    if (this.options.remote) {
      this.$element
        .find('.modal-content')
        .load(this.options.remote, $.proxy(function () {
          this.$element.trigger('loaded.bs.modal')
        }, this))
    }
  }

  Modal.DEFAULTS = {
    backdrop: true,
    keyboard: true,
    show: true
  }

  Modal.prototype.toggle = function (_relatedTarget) {
    return this.isShown ? this.hide() : this.show(_relatedTarget)
  }

  Modal.prototype.show = function (_relatedTarget) {
    var that = this
    var e    = $.Event('show.bs.modal', { relatedTarget: _relatedTarget })

    this.$element.trigger(e)

    if (this.isShown || e.isDefaultPrevented()) return

    this.isShown = true

    this.checkScrollbar()
    this.$body.addClass('modal-open')

    this.setScrollbar()
    this.escape()

    this.$element.on('click.dismiss.bs.modal', '[data-dismiss="modal"]', $.proxy(this.hide, this))

    this.backdrop(function () {
      var transition = $.support.transition && that.$element.hasClass('fade')

      if (!that.$element.parent().length) {
        that.$element.appendTo(that.$body) // don't move modals dom position
      }

      that.$element
        .show()
        .scrollTop(0)

      if (transition) {
        that.$element[0].offsetWidth // force reflow
      }

      that.$element
        .addClass('in')
        .attr('aria-hidden', false)

      that.enforceFocus()

      var e = $.Event('shown.bs.modal', { relatedTarget: _relatedTarget })

      transition ?
        that.$element.find('.modal-dialog') // wait for modal to slide in
          .one($.support.transition.end, function () {
            that.$element.trigger('focus').trigger(e)
          })
          .emulateTransitionEnd(300) :
        that.$element.trigger('focus').trigger(e)
    })
  }

  Modal.prototype.hide = function (e) {
    if (e) e.preventDefault()

    e = $.Event('hide.bs.modal')

    this.$element.trigger(e)

    if (!this.isShown || e.isDefaultPrevented()) return

    this.isShown = false

    this.$body.removeClass('modal-open')

    this.resetScrollbar()
    this.escape()

    $(document).off('focusin.bs.modal')

    this.$element
      .removeClass('in')
      .attr('aria-hidden', true)
      .off('click.dismiss.bs.modal')

    $.support.transition && this.$element.hasClass('fade') ?
      this.$element
        .one($.support.transition.end, $.proxy(this.hideModal, this))
        .emulateTransitionEnd(300) :
      this.hideModal()
  }

  Modal.prototype.enforceFocus = function () {
    $(document)
      .off('focusin.bs.modal') // guard against infinite focus loop
      .on('focusin.bs.modal', $.proxy(function (e) {
        if (this.$element[0] !== e.target && !this.$element.has(e.target).length) {
          this.$element.trigger('focus')
        }
      }, this))
  }

  Modal.prototype.escape = function () {
    if (this.isShown && this.options.keyboard) {
      this.$element.on('keyup.dismiss.bs.modal', $.proxy(function (e) {
        e.which == 27 && this.hide()
      }, this))
    } else if (!this.isShown) {
      this.$element.off('keyup.dismiss.bs.modal')
    }
  }

  Modal.prototype.hideModal = function () {
    var that = this
    this.$element.hide()
    this.backdrop(function () {
      that.removeBackdrop()
      that.$element.trigger('hidden.bs.modal')
    })
  }

  Modal.prototype.removeBackdrop = function () {
    this.$backdrop && this.$backdrop.remove()
    this.$backdrop = null
  }

  Modal.prototype.backdrop = function (callback) {
    var animate = this.$element.hasClass('fade') ? 'fade' : ''

    if (this.isShown && this.options.backdrop) {
      var doAnimate = $.support.transition && animate

      this.$backdrop = $('<div class="modal-backdrop ' + animate + '" />')
        .appendTo(this.$body)

      this.$element.on('click.dismiss.bs.modal', $.proxy(function (e) {
        if (e.target !== e.currentTarget) return
        this.options.backdrop == 'static'
          ? this.$element[0].focus.call(this.$element[0])
          : this.hide.call(this)
      }, this))

      if (doAnimate) this.$backdrop[0].offsetWidth // force reflow

      this.$backdrop.addClass('in')

      if (!callback) return

      doAnimate ?
        this.$backdrop
          .one($.support.transition.end, callback)
          .emulateTransitionEnd(150) :
        callback()

    } else if (!this.isShown && this.$backdrop) {
      this.$backdrop.removeClass('in')

      $.support.transition && this.$element.hasClass('fade') ?
        this.$backdrop
          .one($.support.transition.end, callback)
          .emulateTransitionEnd(150) :
        callback()

    } else if (callback) {
      callback()
    }
  }

  Modal.prototype.checkScrollbar = function () {
    if (document.body.clientWidth >= window.innerWidth) return
    this.scrollbarWidth = this.scrollbarWidth || this.measureScrollbar()
  }

  Modal.prototype.setScrollbar =  function () {
    var bodyPad = parseInt(this.$body.css('padding-right') || 0)
    if (this.scrollbarWidth) this.$body.css('padding-right', bodyPad + this.scrollbarWidth)
  }

  Modal.prototype.resetScrollbar = function () {
    this.$body.css('padding-right', '')
  }

  Modal.prototype.measureScrollbar = function () { // thx walsh
    var scrollDiv = document.createElement('div')
    scrollDiv.className = 'modal-scrollbar-measure'
    this.$body.append(scrollDiv)
    var scrollbarWidth = scrollDiv.offsetWidth - scrollDiv.clientWidth
    this.$body[0].removeChild(scrollDiv)
    return scrollbarWidth
  }


  // MODAL PLUGIN DEFINITION
  // =======================

  var old = $.fn.modal

  $.fn.modal = function (option, _relatedTarget) {
    return this.each(function () {
      var $this   = $(this)
      var data    = $this.data('bs.modal')
      var options = $.extend({}, Modal.DEFAULTS, $this.data(), typeof option == 'object' && option)

      if (!data) $this.data('bs.modal', (data = new Modal(this, options)))
      if (typeof option == 'string') data[option](_relatedTarget)
      else if (options.show) data.show(_relatedTarget)
    })
  }

  $.fn.modal.Constructor = Modal


  // MODAL NO CONFLICT
  // =================

  $.fn.modal.noConflict = function () {
    $.fn.modal = old
    return this
  }


  // MODAL DATA-API
  // ==============

  $(document).on('click.bs.modal.data-api', '[data-toggle="modal"]', function (e) {
    var $this   = $(this)
    var href    = $this.attr('href')
    var $target = $($this.attr('data-target') || (href && href.replace(/.*(?=#[^\s]+$)/, ''))) //strip for ie7
    var option  = $target.data('bs.modal') ? 'toggle' : $.extend({ remote: !/#/.test(href) && href }, $target.data(), $this.data())

    if ($this.is('a')) e.preventDefault()

    $target
      .modal(option, this)
      .one('hide', function () {
        $this.is(':visible') && $this.trigger('focus')
      })
  })

}(jQuery);
// This file is generated by Blacklight. You probably don't want to edit
//   this file directly, or you'll have to manually merge your changes if later
//   versions of Blacklight change this file. Instead, use your own JS file
//   which over-rides things in this JS file, as described below.
//
// These javascript files are compiled in via the Rails asset pipeline:


//
//Bootstrap JS for providing collapsable tablet/mobile menu/alert boxes


/* Blacklight has a Javascript setup meant to support local disabling, 
  modification, and use of Blacklight behaviors. 
  
  There is a global Blacklight object, available to your local JS. 
  
  Individual logic to apply JS behaviors to particular elements is 
  stored in functions on that Blacklight object. 
  
  The actual behaviors themselves are implemented as JQuery plugins, 
  JQuery-UI widgets (a special kind of JQuery plugin), or in some cases
  just as logic in the Blacklight global object. 
  
  All of these things can be modified by your local JS code -- these functions
  are all set up on js load, and only called on document ready, so do your
  modifications just on js load, and they'll be made by the time document ready
  comes along. 
  
  Examples, in your application's own JS:
        
    Turn off adding of behavior to facet 'more' links, using a no-op function:
    
        Blacklight.do_more_facets_behavior = function() {};
        
    Change the implementation of facet 'more' link behavior to use entirely
    different JS. 
    
        Blacklight.do_more_facets_behavior = function() {
          $(Blacklight.do_more_facets_behavior.selector).each(function() {
            //my own thing!
          });
        };
*/


$('.no-js').removeClass('no-js').addClass('js');
//     Underscore.js 1.6.0
//     http://underscorejs.org
//     (c) 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
//     Underscore may be freely distributed under the MIT license.

(function() {

  // Baseline setup
  // --------------

  // Establish the root object, `window` in the browser, or `exports` on the server.
  var root = this;

  // Save the previous value of the `_` variable.
  var previousUnderscore = root._;

  // Establish the object that gets returned to break out of a loop iteration.
  var breaker = {};

  // Save bytes in the minified (but not gzipped) version:
  var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype;

  // Create quick reference variables for speed access to core prototypes.
  var
    push             = ArrayProto.push,
    slice            = ArrayProto.slice,
    concat           = ArrayProto.concat,
    toString         = ObjProto.toString,
    hasOwnProperty   = ObjProto.hasOwnProperty;

  // All **ECMAScript 5** native function implementations that we hope to use
  // are declared here.
  var
    nativeForEach      = ArrayProto.forEach,
    nativeMap          = ArrayProto.map,
    nativeReduce       = ArrayProto.reduce,
    nativeReduceRight  = ArrayProto.reduceRight,
    nativeFilter       = ArrayProto.filter,
    nativeEvery        = ArrayProto.every,
    nativeSome         = ArrayProto.some,
    nativeIndexOf      = ArrayProto.indexOf,
    nativeLastIndexOf  = ArrayProto.lastIndexOf,
    nativeIsArray      = Array.isArray,
    nativeKeys         = Object.keys,
    nativeBind         = FuncProto.bind;

  // Create a safe reference to the Underscore object for use below.
  var _ = function(obj) {
    if (obj instanceof _) return obj;
    if (!(this instanceof _)) return new _(obj);
    this._wrapped = obj;
  };

  // Export the Underscore object for **Node.js**, with
  // backwards-compatibility for the old `require()` API. If we're in
  // the browser, add `_` as a global object via a string identifier,
  // for Closure Compiler "advanced" mode.
  if (typeof exports !== 'undefined') {
    if (typeof module !== 'undefined' && module.exports) {
      exports = module.exports = _;
    }
    exports._ = _;
  } else {
    root._ = _;
  }

  // Current version.
  _.VERSION = '1.6.0';

  // Collection Functions
  // --------------------

  // The cornerstone, an `each` implementation, aka `forEach`.
  // Handles objects with the built-in `forEach`, arrays, and raw objects.
  // Delegates to **ECMAScript 5**'s native `forEach` if available.
  var each = _.each = _.forEach = function(obj, iterator, context) {
    if (obj == null) return obj;
    if (nativeForEach && obj.forEach === nativeForEach) {
      obj.forEach(iterator, context);
    } else if (obj.length === +obj.length) {
      for (var i = 0, length = obj.length; i < length; i++) {
        if (iterator.call(context, obj[i], i, obj) === breaker) return;
      }
    } else {
      var keys = _.keys(obj);
      for (var i = 0, length = keys.length; i < length; i++) {
        if (iterator.call(context, obj[keys[i]], keys[i], obj) === breaker) return;
      }
    }
    return obj;
  };

  // Return the results of applying the iterator to each element.
  // Delegates to **ECMAScript 5**'s native `map` if available.
  _.map = _.collect = function(obj, iterator, context) {
    var results = [];
    if (obj == null) return results;
    if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
    each(obj, function(value, index, list) {
      results.push(iterator.call(context, value, index, list));
    });
    return results;
  };

  var reduceError = 'Reduce of empty array with no initial value';

  // **Reduce** builds up a single result from a list of values, aka `inject`,
  // or `foldl`. Delegates to **ECMAScript 5**'s native `reduce` if available.
  _.reduce = _.foldl = _.inject = function(obj, iterator, memo, context) {
    var initial = arguments.length > 2;
    if (obj == null) obj = [];
    if (nativeReduce && obj.reduce === nativeReduce) {
      if (context) iterator = _.bind(iterator, context);
      return initial ? obj.reduce(iterator, memo) : obj.reduce(iterator);
    }
    each(obj, function(value, index, list) {
      if (!initial) {
        memo = value;
        initial = true;
      } else {
        memo = iterator.call(context, memo, value, index, list);
      }
    });
    if (!initial) throw new TypeError(reduceError);
    return memo;
  };

  // The right-associative version of reduce, also known as `foldr`.
  // Delegates to **ECMAScript 5**'s native `reduceRight` if available.
  _.reduceRight = _.foldr = function(obj, iterator, memo, context) {
    var initial = arguments.length > 2;
    if (obj == null) obj = [];
    if (nativeReduceRight && obj.reduceRight === nativeReduceRight) {
      if (context) iterator = _.bind(iterator, context);
      return initial ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator);
    }
    var length = obj.length;
    if (length !== +length) {
      var keys = _.keys(obj);
      length = keys.length;
    }
    each(obj, function(value, index, list) {
      index = keys ? keys[--length] : --length;
      if (!initial) {
        memo = obj[index];
        initial = true;
      } else {
        memo = iterator.call(context, memo, obj[index], index, list);
      }
    });
    if (!initial) throw new TypeError(reduceError);
    return memo;
  };

  // Return the first value which passes a truth test. Aliased as `detect`.
  _.find = _.detect = function(obj, predicate, context) {
    var result;
    any(obj, function(value, index, list) {
      if (predicate.call(context, value, index, list)) {
        result = value;
        return true;
      }
    });
    return result;
  };

  // Return all the elements that pass a truth test.
  // Delegates to **ECMAScript 5**'s native `filter` if available.
  // Aliased as `select`.
  _.filter = _.select = function(obj, predicate, context) {
    var results = [];
    if (obj == null) return results;
    if (nativeFilter && obj.filter === nativeFilter) return obj.filter(predicate, context);
    each(obj, function(value, index, list) {
      if (predicate.call(context, value, index, list)) results.push(value);
    });
    return results;
  };

  // Return all the elements for which a truth test fails.
  _.reject = function(obj, predicate, context) {
    return _.filter(obj, function(value, index, list) {
      return !predicate.call(context, value, index, list);
    }, context);
  };

  // Determine whether all of the elements match a truth test.
  // Delegates to **ECMAScript 5**'s native `every` if available.
  // Aliased as `all`.
  _.every = _.all = function(obj, predicate, context) {
    predicate || (predicate = _.identity);
    var result = true;
    if (obj == null) return result;
    if (nativeEvery && obj.every === nativeEvery) return obj.every(predicate, context);
    each(obj, function(value, index, list) {
      if (!(result = result && predicate.call(context, value, index, list))) return breaker;
    });
    return !!result;
  };

  // Determine if at least one element in the object matches a truth test.
  // Delegates to **ECMAScript 5**'s native `some` if available.
  // Aliased as `any`.
  var any = _.some = _.any = function(obj, predicate, context) {
    predicate || (predicate = _.identity);
    var result = false;
    if (obj == null) return result;
    if (nativeSome && obj.some === nativeSome) return obj.some(predicate, context);
    each(obj, function(value, index, list) {
      if (result || (result = predicate.call(context, value, index, list))) return breaker;
    });
    return !!result;
  };

  // Determine if the array or object contains a given value (using `===`).
  // Aliased as `include`.
  _.contains = _.include = function(obj, target) {
    if (obj == null) return false;
    if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
    return any(obj, function(value) {
      return value === target;
    });
  };

  // Invoke a method (with arguments) on every item in a collection.
  _.invoke = function(obj, method) {
    var args = slice.call(arguments, 2);
    var isFunc = _.isFunction(method);
    return _.map(obj, function(value) {
      return (isFunc ? method : value[method]).apply(value, args);
    });
  };

  // Convenience version of a common use case of `map`: fetching a property.
  _.pluck = function(obj, key) {
    return _.map(obj, _.property(key));
  };

  // Convenience version of a common use case of `filter`: selecting only objects
  // containing specific `key:value` pairs.
  _.where = function(obj, attrs) {
    return _.filter(obj, _.matches(attrs));
  };

  // Convenience version of a common use case of `find`: getting the first object
  // containing specific `key:value` pairs.
  _.findWhere = function(obj, attrs) {
    return _.find(obj, _.matches(attrs));
  };

  // Return the maximum element or (element-based computation).
  // Can't optimize arrays of integers longer than 65,535 elements.
  // See [WebKit Bug 80797](https://bugs.webkit.org/show_bug.cgi?id=80797)
  _.max = function(obj, iterator, context) {
    if (!iterator && _.isArray(obj) && obj[0] === +obj[0] && obj.length < 65535) {
      return Math.max.apply(Math, obj);
    }
    var result = -Infinity, lastComputed = -Infinity;
    each(obj, function(value, index, list) {
      var computed = iterator ? iterator.call(context, value, index, list) : value;
      if (computed > lastComputed) {
        result = value;
        lastComputed = computed;
      }
    });
    return result;
  };

  // Return the minimum element (or element-based computation).
  _.min = function(obj, iterator, context) {
    if (!iterator && _.isArray(obj) && obj[0] === +obj[0] && obj.length < 65535) {
      return Math.min.apply(Math, obj);
    }
    var result = Infinity, lastComputed = Infinity;
    each(obj, function(value, index, list) {
      var computed = iterator ? iterator.call(context, value, index, list) : value;
      if (computed < lastComputed) {
        result = value;
        lastComputed = computed;
      }
    });
    return result;
  };

  // Shuffle an array, using the modern version of the
  // [Fisher-Yates shuffle](http://en.wikipedia.org/wiki/Fisherâ€“Yates_shuffle).
  _.shuffle = function(obj) {
    var rand;
    var index = 0;
    var shuffled = [];
    each(obj, function(value) {
      rand = _.random(index++);
      shuffled[index - 1] = shuffled[rand];
      shuffled[rand] = value;
    });
    return shuffled;
  };

  // Sample **n** random values from a collection.
  // If **n** is not specified, returns a single random element.
  // The internal `guard` argument allows it to work with `map`.
  _.sample = function(obj, n, guard) {
    if (n == null || guard) {
      if (obj.length !== +obj.length) obj = _.values(obj);
      return obj[_.random(obj.length - 1)];
    }
    return _.shuffle(obj).slice(0, Math.max(0, n));
  };

  // An internal function to generate lookup iterators.
  var lookupIterator = function(value) {
    if (value == null) return _.identity;
    if (_.isFunction(value)) return value;
    return _.property(value);
  };

  // Sort the object's values by a criterion produced by an iterator.
  _.sortBy = function(obj, iterator, context) {
    iterator = lookupIterator(iterator);
    return _.pluck(_.map(obj, function(value, index, list) {
      return {
        value: value,
        index: index,
        criteria: iterator.call(context, value, index, list)
      };
    }).sort(function(left, right) {
      var a = left.criteria;
      var b = right.criteria;
      if (a !== b) {
        if (a > b || a === void 0) return 1;
        if (a < b || b === void 0) return -1;
      }
      return left.index - right.index;
    }), 'value');
  };

  // An internal function used for aggregate "group by" operations.
  var group = function(behavior) {
    return function(obj, iterator, context) {
      var result = {};
      iterator = lookupIterator(iterator);
      each(obj, function(value, index) {
        var key = iterator.call(context, value, index, obj);
        behavior(result, key, value);
      });
      return result;
    };
  };

  // Groups the object's values by a criterion. Pass either a string attribute
  // to group by, or a function that returns the criterion.
  _.groupBy = group(function(result, key, value) {
    _.has(result, key) ? result[key].push(value) : result[key] = [value];
  });

  // Indexes the object's values by a criterion, similar to `groupBy`, but for
  // when you know that your index values will be unique.
  _.indexBy = group(function(result, key, value) {
    result[key] = value;
  });

  // Counts instances of an object that group by a certain criterion. Pass
  // either a string attribute to count by, or a function that returns the
  // criterion.
  _.countBy = group(function(result, key) {
    _.has(result, key) ? result[key]++ : result[key] = 1;
  });

  // Use a comparator function to figure out the smallest index at which
  // an object should be inserted so as to maintain order. Uses binary search.
  _.sortedIndex = function(array, obj, iterator, context) {
    iterator = lookupIterator(iterator);
    var value = iterator.call(context, obj);
    var low = 0, high = array.length;
    while (low < high) {
      var mid = (low + high) >>> 1;
      iterator.call(context, array[mid]) < value ? low = mid + 1 : high = mid;
    }
    return low;
  };

  // Safely create a real, live array from anything iterable.
  _.toArray = function(obj) {
    if (!obj) return [];
    if (_.isArray(obj)) return slice.call(obj);
    if (obj.length === +obj.length) return _.map(obj, _.identity);
    return _.values(obj);
  };

  // Return the number of elements in an object.
  _.size = function(obj) {
    if (obj == null) return 0;
    return (obj.length === +obj.length) ? obj.length : _.keys(obj).length;
  };

  // Array Functions
  // ---------------

  // Get the first element of an array. Passing **n** will return the first N
  // values in the array. Aliased as `head` and `take`. The **guard** check
  // allows it to work with `_.map`.
  _.first = _.head = _.take = function(array, n, guard) {
    if (array == null) return void 0;
    if ((n == null) || guard) return array[0];
    if (n < 0) return [];
    return slice.call(array, 0, n);
  };

  // Returns everything but the last entry of the array. Especially useful on
  // the arguments object. Passing **n** will return all the values in
  // the array, excluding the last N. The **guard** check allows it to work with
  // `_.map`.
  _.initial = function(array, n, guard) {
    return slice.call(array, 0, array.length - ((n == null) || guard ? 1 : n));
  };

  // Get the last element of an array. Passing **n** will return the last N
  // values in the array. The **guard** check allows it to work with `_.map`.
  _.last = function(array, n, guard) {
    if (array == null) return void 0;
    if ((n == null) || guard) return array[array.length - 1];
    return slice.call(array, Math.max(array.length - n, 0));
  };

  // Returns everything but the first entry of the array. Aliased as `tail` and `drop`.
  // Especially useful on the arguments object. Passing an **n** will return
  // the rest N values in the array. The **guard**
  // check allows it to work with `_.map`.
  _.rest = _.tail = _.drop = function(array, n, guard) {
    return slice.call(array, (n == null) || guard ? 1 : n);
  };

  // Trim out all falsy values from an array.
  _.compact = function(array) {
    return _.filter(array, _.identity);
  };

  // Internal implementation of a recursive `flatten` function.
  var flatten = function(input, shallow, output) {
    if (shallow && _.every(input, _.isArray)) {
      return concat.apply(output, input);
    }
    each(input, function(value) {
      if (_.isArray(value) || _.isArguments(value)) {
        shallow ? push.apply(output, value) : flatten(value, shallow, output);
      } else {
        output.push(value);
      }
    });
    return output;
  };

  // Flatten out an array, either recursively (by default), or just one level.
  _.flatten = function(array, shallow) {
    return flatten(array, shallow, []);
  };

  // Return a version of the array that does not contain the specified value(s).
  _.without = function(array) {
    return _.difference(array, slice.call(arguments, 1));
  };

  // Split an array into two arrays: one whose elements all satisfy the given
  // predicate, and one whose elements all do not satisfy the predicate.
  _.partition = function(array, predicate) {
    var pass = [], fail = [];
    each(array, function(elem) {
      (predicate(elem) ? pass : fail).push(elem);
    });
    return [pass, fail];
  };

  // Produce a duplicate-free version of the array. If the array has already
  // been sorted, you have the option of using a faster algorithm.
  // Aliased as `unique`.
  _.uniq = _.unique = function(array, isSorted, iterator, context) {
    if (_.isFunction(isSorted)) {
      context = iterator;
      iterator = isSorted;
      isSorted = false;
    }
    var initial = iterator ? _.map(array, iterator, context) : array;
    var results = [];
    var seen = [];
    each(initial, function(value, index) {
      if (isSorted ? (!index || seen[seen.length - 1] !== value) : !_.contains(seen, value)) {
        seen.push(value);
        results.push(array[index]);
      }
    });
    return results;
  };

  // Produce an array that contains the union: each distinct element from all of
  // the passed-in arrays.
  _.union = function() {
    return _.uniq(_.flatten(arguments, true));
  };

  // Produce an array that contains every item shared between all the
  // passed-in arrays.
  _.intersection = function(array) {
    var rest = slice.call(arguments, 1);
    return _.filter(_.uniq(array), function(item) {
      return _.every(rest, function(other) {
        return _.contains(other, item);
      });
    });
  };

  // Take the difference between one array and a number of other arrays.
  // Only the elements present in just the first array will remain.
  _.difference = function(array) {
    var rest = concat.apply(ArrayProto, slice.call(arguments, 1));
    return _.filter(array, function(value){ return !_.contains(rest, value); });
  };

  // Zip together multiple lists into a single array -- elements that share
  // an index go together.
  _.zip = function() {
    var length = _.max(_.pluck(arguments, 'length').concat(0));
    var results = new Array(length);
    for (var i = 0; i < length; i++) {
      results[i] = _.pluck(arguments, '' + i);
    }
    return results;
  };

  // Converts lists into objects. Pass either a single array of `[key, value]`
  // pairs, or two parallel arrays of the same length -- one of keys, and one of
  // the corresponding values.
  _.object = function(list, values) {
    if (list == null) return {};
    var result = {};
    for (var i = 0, length = list.length; i < length; i++) {
      if (values) {
        result[list[i]] = values[i];
      } else {
        result[list[i][0]] = list[i][1];
      }
    }
    return result;
  };

  // If the browser doesn't supply us with indexOf (I'm looking at you, **MSIE**),
  // we need this function. Return the position of the first occurrence of an
  // item in an array, or -1 if the item is not included in the array.
  // Delegates to **ECMAScript 5**'s native `indexOf` if available.
  // If the array is large and already in sort order, pass `true`
  // for **isSorted** to use binary search.
  _.indexOf = function(array, item, isSorted) {
    if (array == null) return -1;
    var i = 0, length = array.length;
    if (isSorted) {
      if (typeof isSorted == 'number') {
        i = (isSorted < 0 ? Math.max(0, length + isSorted) : isSorted);
      } else {
        i = _.sortedIndex(array, item);
        return array[i] === item ? i : -1;
      }
    }
    if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item, isSorted);
    for (; i < length; i++) if (array[i] === item) return i;
    return -1;
  };

  // Delegates to **ECMAScript 5**'s native `lastIndexOf` if available.
  _.lastIndexOf = function(array, item, from) {
    if (array == null) return -1;
    var hasIndex = from != null;
    if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) {
      return hasIndex ? array.lastIndexOf(item, from) : array.lastIndexOf(item);
    }
    var i = (hasIndex ? from : array.length);
    while (i--) if (array[i] === item) return i;
    return -1;
  };

  // Generate an integer Array containing an arithmetic progression. A port of
  // the native Python `range()` function. See
  // [the Python documentation](http://docs.python.org/library/functions.html#range).
  _.range = function(start, stop, step) {
    if (arguments.length <= 1) {
      stop = start || 0;
      start = 0;
    }
    step = arguments[2] || 1;

    var length = Math.max(Math.ceil((stop - start) / step), 0);
    var idx = 0;
    var range = new Array(length);

    while(idx < length) {
      range[idx++] = start;
      start += step;
    }

    return range;
  };

  // Function (ahem) Functions
  // ------------------

  // Reusable constructor function for prototype setting.
  var ctor = function(){};

  // Create a function bound to a given object (assigning `this`, and arguments,
  // optionally). Delegates to **ECMAScript 5**'s native `Function.bind` if
  // available.
  _.bind = function(func, context) {
    var args, bound;
    if (nativeBind && func.bind === nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));
    if (!_.isFunction(func)) throw new TypeError;
    args = slice.call(arguments, 2);
    return bound = function() {
      if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments)));
      ctor.prototype = func.prototype;
      var self = new ctor;
      ctor.prototype = null;
      var result = func.apply(self, args.concat(slice.call(arguments)));
      if (Object(result) === result) return result;
      return self;
    };
  };

  // Partially apply a function by creating a version that has had some of its
  // arguments pre-filled, without changing its dynamic `this` context. _ acts
  // as a placeholder, allowing any combination of arguments to be pre-filled.
  _.partial = function(func) {
    var boundArgs = slice.call(arguments, 1);
    return function() {
      var position = 0;
      var args = boundArgs.slice();
      for (var i = 0, length = args.length; i < length; i++) {
        if (args[i] === _) args[i] = arguments[position++];
      }
      while (position < arguments.length) args.push(arguments[position++]);
      return func.apply(this, args);
    };
  };

  // Bind a number of an object's methods to that object. Remaining arguments
  // are the method names to be bound. Useful for ensuring that all callbacks
  // defined on an object belong to it.
  _.bindAll = function(obj) {
    var funcs = slice.call(arguments, 1);
    if (funcs.length === 0) throw new Error('bindAll must be passed function names');
    each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); });
    return obj;
  };

  // Memoize an expensive function by storing its results.
  _.memoize = function(func, hasher) {
    var memo = {};
    hasher || (hasher = _.identity);
    return function() {
      var key = hasher.apply(this, arguments);
      return _.has(memo, key) ? memo[key] : (memo[key] = func.apply(this, arguments));
    };
  };

  // Delays a function for the given number of milliseconds, and then calls
  // it with the arguments supplied.
  _.delay = function(func, wait) {
    var args = slice.call(arguments, 2);
    return setTimeout(function(){ return func.apply(null, args); }, wait);
  };

  // Defers a function, scheduling it to run after the current call stack has
  // cleared.
  _.defer = function(func) {
    return _.delay.apply(_, [func, 1].concat(slice.call(arguments, 1)));
  };

  // Returns a function, that, when invoked, will only be triggered at most once
  // during a given window of time. Normally, the throttled function will run
  // as much as it can, without ever going more than once per `wait` duration;
  // but if you'd like to disable the execution on the leading edge, pass
  // `{leading: false}`. To disable execution on the trailing edge, ditto.
  _.throttle = function(func, wait, options) {
    var context, args, result;
    var timeout = null;
    var previous = 0;
    options || (options = {});
    var later = function() {
      previous = options.leading === false ? 0 : _.now();
      timeout = null;
      result = func.apply(context, args);
      context = args = null;
    };
    return function() {
      var now = _.now();
      if (!previous && options.leading === false) previous = now;
      var remaining = wait - (now - previous);
      context = this;
      args = arguments;
      if (remaining <= 0) {
        clearTimeout(timeout);
        timeout = null;
        previous = now;
        result = func.apply(context, args);
        context = args = null;
      } else if (!timeout && options.trailing !== false) {
        timeout = setTimeout(later, remaining);
      }
      return result;
    };
  };

  // Returns a function, that, as long as it continues to be invoked, will not
  // be triggered. The function will be called after it stops being called for
  // N milliseconds. If `immediate` is passed, trigger the function on the
  // leading edge, instead of the trailing.
  _.debounce = function(func, wait, immediate) {
    var timeout, args, context, timestamp, result;

    var later = function() {
      var last = _.now() - timestamp;
      if (last < wait) {
        timeout = setTimeout(later, wait - last);
      } else {
        timeout = null;
        if (!immediate) {
          result = func.apply(context, args);
          context = args = null;
        }
      }
    };

    return function() {
      context = this;
      args = arguments;
      timestamp = _.now();
      var callNow = immediate && !timeout;
      if (!timeout) {
        timeout = setTimeout(later, wait);
      }
      if (callNow) {
        result = func.apply(context, args);
        context = args = null;
      }

      return result;
    };
  };

  // Returns a function that will be executed at most one time, no matter how
  // often you call it. Useful for lazy initialization.
  _.once = function(func) {
    var ran = false, memo;
    return function() {
      if (ran) return memo;
      ran = true;
      memo = func.apply(this, arguments);
      func = null;
      return memo;
    };
  };

  // Returns the first function passed as an argument to the second,
  // allowing you to adjust arguments, run code before and after, and
  // conditionally execute the original function.
  _.wrap = function(func, wrapper) {
    return _.partial(wrapper, func);
  };

  // Returns a function that is the composition of a list of functions, each
  // consuming the return value of the function that follows.
  _.compose = function() {
    var funcs = arguments;
    return function() {
      var args = arguments;
      for (var i = funcs.length - 1; i >= 0; i--) {
        args = [funcs[i].apply(this, args)];
      }
      return args[0];
    };
  };

  // Returns a function that will only be executed after being called N times.
  _.after = function(times, func) {
    return function() {
      if (--times < 1) {
        return func.apply(this, arguments);
      }
    };
  };

  // Object Functions
  // ----------------

  // Retrieve the names of an object's properties.
  // Delegates to **ECMAScript 5**'s native `Object.keys`
  _.keys = function(obj) {
    if (!_.isObject(obj)) return [];
    if (nativeKeys) return nativeKeys(obj);
    var keys = [];
    for (var key in obj) if (_.has(obj, key)) keys.push(key);
    return keys;
  };

  // Retrieve the values of an object's properties.
  _.values = function(obj) {
    var keys = _.keys(obj);
    var length = keys.length;
    var values = new Array(length);
    for (var i = 0; i < length; i++) {
      values[i] = obj[keys[i]];
    }
    return values;
  };

  // Convert an object into a list of `[key, value]` pairs.
  _.pairs = function(obj) {
    var keys = _.keys(obj);
    var length = keys.length;
    var pairs = new Array(length);
    for (var i = 0; i < length; i++) {
      pairs[i] = [keys[i], obj[keys[i]]];
    }
    return pairs;
  };

  // Invert the keys and values of an object. The values must be serializable.
  _.invert = function(obj) {
    var result = {};
    var keys = _.keys(obj);
    for (var i = 0, length = keys.length; i < length; i++) {
      result[obj[keys[i]]] = keys[i];
    }
    return result;
  };

  // Return a sorted list of the function names available on the object.
  // Aliased as `methods`
  _.functions = _.methods = function(obj) {
    var names = [];
    for (var key in obj) {
      if (_.isFunction(obj[key])) names.push(key);
    }
    return names.sort();
  };

  // Extend a given object with all the properties in passed-in object(s).
  _.extend = function(obj) {
    each(slice.call(arguments, 1), function(source) {
      if (source) {
        for (var prop in source) {
          obj[prop] = source[prop];
        }
      }
    });
    return obj;
  };

  // Return a copy of the object only containing the whitelisted properties.
  _.pick = function(obj) {
    var copy = {};
    var keys = concat.apply(ArrayProto, slice.call(arguments, 1));
    each(keys, function(key) {
      if (key in obj) copy[key] = obj[key];
    });
    return copy;
  };

   // Return a copy of the object without the blacklisted properties.
  _.omit = function(obj) {
    var copy = {};
    var keys = concat.apply(ArrayProto, slice.call(arguments, 1));
    for (var key in obj) {
      if (!_.contains(keys, key)) copy[key] = obj[key];
    }
    return copy;
  };

  // Fill in a given object with default properties.
  _.defaults = function(obj) {
    each(slice.call(arguments, 1), function(source) {
      if (source) {
        for (var prop in source) {
          if (obj[prop] === void 0) obj[prop] = source[prop];
        }
      }
    });
    return obj;
  };

  // Create a (shallow-cloned) duplicate of an object.
  _.clone = function(obj) {
    if (!_.isObject(obj)) return obj;
    return _.isArray(obj) ? obj.slice() : _.extend({}, obj);
  };

  // Invokes interceptor with the obj, and then returns obj.
  // The primary purpose of this method is to "tap into" a method chain, in
  // order to perform operations on intermediate results within the chain.
  _.tap = function(obj, interceptor) {
    interceptor(obj);
    return obj;
  };

  // Internal recursive comparison function for `isEqual`.
  var eq = function(a, b, aStack, bStack) {
    // Identical objects are equal. `0 === -0`, but they aren't identical.
    // See the [Harmony `egal` proposal](http://wiki.ecmascript.org/doku.php?id=harmony:egal).
    if (a === b) return a !== 0 || 1 / a == 1 / b;
    // A strict comparison is necessary because `null == undefined`.
    if (a == null || b == null) return a === b;
    // Unwrap any wrapped objects.
    if (a instanceof _) a = a._wrapped;
    if (b instanceof _) b = b._wrapped;
    // Compare `[[Class]]` names.
    var className = toString.call(a);
    if (className != toString.call(b)) return false;
    switch (className) {
      // Strings, numbers, dates, and booleans are compared by value.
      case '[object String]':
        // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
        // equivalent to `new String("5")`.
        return a == String(b);
      case '[object Number]':
        // `NaN`s are equivalent, but non-reflexive. An `egal` comparison is performed for
        // other numeric values.
        return a != +a ? b != +b : (a == 0 ? 1 / a == 1 / b : a == +b);
      case '[object Date]':
      case '[object Boolean]':
        // Coerce dates and booleans to numeric primitive values. Dates are compared by their
        // millisecond representations. Note that invalid dates with millisecond representations
        // of `NaN` are not equivalent.
        return +a == +b;
      // RegExps are compared by their source patterns and flags.
      case '[object RegExp]':
        return a.source == b.source &&
               a.global == b.global &&
               a.multiline == b.multiline &&
               a.ignoreCase == b.ignoreCase;
    }
    if (typeof a != 'object' || typeof b != 'object') return false;
    // Assume equality for cyclic structures. The algorithm for detecting cyclic
    // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
    var length = aStack.length;
    while (length--) {
      // Linear search. Performance is inversely proportional to the number of
      // unique nested structures.
      if (aStack[length] == a) return bStack[length] == b;
    }
    // Objects with different constructors are not equivalent, but `Object`s
    // from different frames are.
    var aCtor = a.constructor, bCtor = b.constructor;
    if (aCtor !== bCtor && !(_.isFunction(aCtor) && (aCtor instanceof aCtor) &&
                             _.isFunction(bCtor) && (bCtor instanceof bCtor))
                        && ('constructor' in a && 'constructor' in b)) {
      return false;
    }
    // Add the first object to the stack of traversed objects.
    aStack.push(a);
    bStack.push(b);
    var size = 0, result = true;
    // Recursively compare objects and arrays.
    if (className == '[object Array]') {
      // Compare array lengths to determine if a deep comparison is necessary.
      size = a.length;
      result = size == b.length;
      if (result) {
        // Deep compare the contents, ignoring non-numeric properties.
        while (size--) {
          if (!(result = eq(a[size], b[size], aStack, bStack))) break;
        }
      }
    } else {
      // Deep compare objects.
      for (var key in a) {
        if (_.has(a, key)) {
          // Count the expected number of properties.
          size++;
          // Deep compare each member.
          if (!(result = _.has(b, key) && eq(a[key], b[key], aStack, bStack))) break;
        }
      }
      // Ensure that both objects contain the same number of properties.
      if (result) {
        for (key in b) {
          if (_.has(b, key) && !(size--)) break;
        }
        result = !size;
      }
    }
    // Remove the first object from the stack of traversed objects.
    aStack.pop();
    bStack.pop();
    return result;
  };

  // Perform a deep comparison to check if two objects are equal.
  _.isEqual = function(a, b) {
    return eq(a, b, [], []);
  };

  // Is a given array, string, or object empty?
  // An "empty" object has no enumerable own-properties.
  _.isEmpty = function(obj) {
    if (obj == null) return true;
    if (_.isArray(obj) || _.isString(obj)) return obj.length === 0;
    for (var key in obj) if (_.has(obj, key)) return false;
    return true;
  };

  // Is a given value a DOM element?
  _.isElement = function(obj) {
    return !!(obj && obj.nodeType === 1);
  };

  // Is a given value an array?
  // Delegates to ECMA5's native Array.isArray
  _.isArray = nativeIsArray || function(obj) {
    return toString.call(obj) == '[object Array]';
  };

  // Is a given variable an object?
  _.isObject = function(obj) {
    return obj === Object(obj);
  };

  // Add some isType methods: isArguments, isFunction, isString, isNumber, isDate, isRegExp.
  each(['Arguments', 'Function', 'String', 'Number', 'Date', 'RegExp'], function(name) {
    _['is' + name] = function(obj) {
      return toString.call(obj) == '[object ' + name + ']';
    };
  });

  // Define a fallback version of the method in browsers (ahem, IE), where
  // there isn't any inspectable "Arguments" type.
  if (!_.isArguments(arguments)) {
    _.isArguments = function(obj) {
      return !!(obj && _.has(obj, 'callee'));
    };
  }

  // Optimize `isFunction` if appropriate.
  if (typeof (/./) !== 'function') {
    _.isFunction = function(obj) {
      return typeof obj === 'function';
    };
  }

  // Is a given object a finite number?
  _.isFinite = function(obj) {
    return isFinite(obj) && !isNaN(parseFloat(obj));
  };

  // Is the given value `NaN`? (NaN is the only number which does not equal itself).
  _.isNaN = function(obj) {
    return _.isNumber(obj) && obj != +obj;
  };

  // Is a given value a boolean?
  _.isBoolean = function(obj) {
    return obj === true || obj === false || toString.call(obj) == '[object Boolean]';
  };

  // Is a given value equal to null?
  _.isNull = function(obj) {
    return obj === null;
  };

  // Is a given variable undefined?
  _.isUndefined = function(obj) {
    return obj === void 0;
  };

  // Shortcut function for checking if an object has a given property directly
  // on itself (in other words, not on a prototype).
  _.has = function(obj, key) {
    return hasOwnProperty.call(obj, key);
  };

  // Utility Functions
  // -----------------

  // Run Underscore.js in *noConflict* mode, returning the `_` variable to its
  // previous owner. Returns a reference to the Underscore object.
  _.noConflict = function() {
    root._ = previousUnderscore;
    return this;
  };

  // Keep the identity function around for default iterators.
  _.identity = function(value) {
    return value;
  };

  _.constant = function(value) {
    return function () {
      return value;
    };
  };

  _.property = function(key) {
    return function(obj) {
      return obj[key];
    };
  };

  // Returns a predicate for checking whether an object has a given set of `key:value` pairs.
  _.matches = function(attrs) {
    return function(obj) {
      if (obj === attrs) return true; //avoid comparing an object to itself.
      for (var key in attrs) {
        if (attrs[key] !== obj[key])
          return false;
      }
      return true;
    }
  };

  // Run a function **n** times.
  _.times = function(n, iterator, context) {
    var accum = Array(Math.max(0, n));
    for (var i = 0; i < n; i++) accum[i] = iterator.call(context, i);
    return accum;
  };

  // Return a random integer between min and max (inclusive).
  _.random = function(min, max) {
    if (max == null) {
      max = min;
      min = 0;
    }
    return min + Math.floor(Math.random() * (max - min + 1));
  };

  // A (possibly faster) way to get the current timestamp as an integer.
  _.now = Date.now || function() { return new Date().getTime(); };

  // List of HTML entities for escaping.
  var entityMap = {
    escape: {
      '&': '&amp;',
      '<': '&lt;',
      '>': '&gt;',
      '"': '&quot;',
      "'": '&#x27;'
    }
  };
  entityMap.unescape = _.invert(entityMap.escape);

  // Regexes containing the keys and values listed immediately above.
  var entityRegexes = {
    escape:   new RegExp('[' + _.keys(entityMap.escape).join('') + ']', 'g'),
    unescape: new RegExp('(' + _.keys(entityMap.unescape).join('|') + ')', 'g')
  };

  // Functions for escaping and unescaping strings to/from HTML interpolation.
  _.each(['escape', 'unescape'], function(method) {
    _[method] = function(string) {
      if (string == null) return '';
      return ('' + string).replace(entityRegexes[method], function(match) {
        return entityMap[method][match];
      });
    };
  });

  // If the value of the named `property` is a function then invoke it with the
  // `object` as context; otherwise, return it.
  _.result = function(object, property) {
    if (object == null) return void 0;
    var value = object[property];
    return _.isFunction(value) ? value.call(object) : value;
  };

  // Add your own custom functions to the Underscore object.
  _.mixin = function(obj) {
    each(_.functions(obj), function(name) {
      var func = _[name] = obj[name];
      _.prototype[name] = function() {
        var args = [this._wrapped];
        push.apply(args, arguments);
        return result.call(this, func.apply(_, args));
      };
    });
  };

  // Generate a unique integer id (unique within the entire client session).
  // Useful for temporary DOM ids.
  var idCounter = 0;
  _.uniqueId = function(prefix) {
    var id = ++idCounter + '';
    return prefix ? prefix + id : id;
  };

  // By default, Underscore uses ERB-style template delimiters, change the
  // following template settings to use alternative delimiters.
  _.templateSettings = {
    evaluate    : /<%([\s\S]+?)%>/g,
    interpolate : /<%=([\s\S]+?)%>/g,
    escape      : /<%-([\s\S]+?)%>/g
  };

  // When customizing `templateSettings`, if you don't want to define an
  // interpolation, evaluation or escaping regex, we need one that is
  // guaranteed not to match.
  var noMatch = /(.)^/;

  // Certain characters need to be escaped so that they can be put into a
  // string literal.
  var escapes = {
    "'":      "'",
    '\\':     '\\',
    '\r':     'r',
    '\n':     'n',
    '\t':     't',
    '\u2028': 'u2028',
    '\u2029': 'u2029'
  };

  var escaper = /\\|'|\r|\n|\t|\u2028|\u2029/g;

  // JavaScript micro-templating, similar to John Resig's implementation.
  // Underscore templating handles arbitrary delimiters, preserves whitespace,
  // and correctly escapes quotes within interpolated code.
  _.template = function(text, data, settings) {
    var render;
    settings = _.defaults({}, settings, _.templateSettings);

    // Combine delimiters into one regular expression via alternation.
    var matcher = new RegExp([
      (settings.escape || noMatch).source,
      (settings.interpolate || noMatch).source,
      (settings.evaluate || noMatch).source
    ].join('|') + '|$', 'g');

    // Compile the template source, escaping string literals appropriately.
    var index = 0;
    var source = "__p+='";
    text.replace(matcher, function(match, escape, interpolate, evaluate, offset) {
      source += text.slice(index, offset)
        .replace(escaper, function(match) { return '\\' + escapes[match]; });

      if (escape) {
        source += "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'";
      }
      if (interpolate) {
        source += "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'";
      }
      if (evaluate) {
        source += "';\n" + evaluate + "\n__p+='";
      }
      index = offset + match.length;
      return match;
    });
    source += "';\n";

    // If a variable is not specified, place data values in local scope.
    if (!settings.variable) source = 'with(obj||{}){\n' + source + '}\n';

    source = "var __t,__p='',__j=Array.prototype.join," +
      "print=function(){__p+=__j.call(arguments,'');};\n" +
      source + "return __p;\n";

    try {
      render = new Function(settings.variable || 'obj', '_', source);
    } catch (e) {
      e.source = source;
      throw e;
    }

    if (data) return render(data, _);
    var template = function(data) {
      return render.call(this, data, _);
    };

    // Provide the compiled function source as a convenience for precompilation.
    template.source = 'function(' + (settings.variable || 'obj') + '){\n' + source + '}';

    return template;
  };

  // Add a "chain" function, which will delegate to the wrapper.
  _.chain = function(obj) {
    return _(obj).chain();
  };

  // OOP
  // ---------------
  // If Underscore is called as a function, it returns a wrapped object that
  // can be used OO-style. This wrapper holds altered versions of all the
  // underscore functions. Wrapped objects may be chained.

  // Helper function to continue chaining intermediate results.
  var result = function(obj) {
    return this._chain ? _(obj).chain() : obj;
  };

  // Add all of the Underscore functions to the wrapper object.
  _.mixin(_);

  // Add all mutator Array functions to the wrapper.
  each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
    var method = ArrayProto[name];
    _.prototype[name] = function() {
      var obj = this._wrapped;
      method.apply(obj, arguments);
      if ((name == 'shift' || name == 'splice') && obj.length === 0) delete obj[0];
      return result.call(this, obj);
    };
  });

  // Add all accessor Array functions to the wrapper.
  each(['concat', 'join', 'slice'], function(name) {
    var method = ArrayProto[name];
    _.prototype[name] = function() {
      return result.call(this, method.apply(this._wrapped, arguments));
    };
  });

  _.extend(_.prototype, {

    // Start chaining a wrapped Underscore object.
    chain: function() {
      this._chain = true;
      return this;
    },

    // Extracts the result from a wrapped and chained object.
    value: function() {
      return this._wrapped;
    }

  });

  // AMD registration happens at the end for compatibility with AMD loaders
  // that may not enforce next-turn semantics on modules. Even though general
  // practice for AMD registration is to be anonymous, underscore registers
  // as a named module because, like jQuery, it is a base library that is
  // popular enough to be bundled in a third party lib, but not be part of
  // an AMD load request. Those cases could generate an error when an
  // anonymous define() is called outside of a loader request.
  if (typeof define === 'function' && define.amd) {
    define('underscore', [], function() {
      return _;
    });
  }
}).call(this);
(function() {

  // Copy and pasted straight out of Backbone 1.0.0
  // We'll try and keep this updated to the latest

  var array = [];
  var slice = array.slice;

  // Backbone.Events
  // ---------------

  // A module that can be mixed in to *any object* in order to provide it with
  // custom events. You may bind with `on` or remove with `off` callback
  // functions to an event; `trigger`-ing an event fires all callbacks in
  // succession.
  //
  //     var object = {};
  //     _.extend(object, Backbone.Events);
  //     object.on('expand', function(){ alert('expanded'); });
  //     object.trigger('expand');
  //
  var Eventable = {

    // Bind an event to a `callback` function. Passing `"all"` will bind
    // the callback to all events fired.
    on: function(name, callback, context) {
      if (!eventsApi(this, 'on', name, [callback, context]) || !callback) return this;
      this._events || (this._events = {});
      var events = this._events[name] || (this._events[name] = []);
      events.push({callback: callback, context: context, ctx: context || this});
      return this;
    },

    // Bind an event to only be triggered a single time. After the first time
    // the callback is invoked, it will be removed.
    once: function(name, callback, context) {
      if (!eventsApi(this, 'once', name, [callback, context]) || !callback) return this;
      var self = this;
      var once = _.once(function() {
        self.off(name, once);
        callback.apply(this, arguments);
      });
      once._callback = callback;
      return this.on(name, once, context);
    },

    // Remove one or many callbacks. If `context` is null, removes all
    // callbacks with that function. If `callback` is null, removes all
    // callbacks for the event. If `name` is null, removes all bound
    // callbacks for all events.
    off: function(name, callback, context) {
      var retain, ev, events, names, i, l, j, k;
      if (!this._events || !eventsApi(this, 'off', name, [callback, context])) return this;
      if (!name && !callback && !context) {
        this._events = {};
        return this;
      }

      names = name ? [name] : _.keys(this._events);
      for (i = 0, l = names.length; i < l; i++) {
        name = names[i];
        if (events = this._events[name]) {
          this._events[name] = retain = [];
          if (callback || context) {
            for (j = 0, k = events.length; j < k; j++) {
              ev = events[j];
              if ((callback && callback !== ev.callback && callback !== ev.callback._callback) ||
                  (context && context !== ev.context)) {
                retain.push(ev);
              }
            }
          }
          if (!retain.length) delete this._events[name];
        }
      }

      return this;
    },

    // Trigger one or many events, firing all bound callbacks. Callbacks are
    // passed the same arguments as `trigger` is, apart from the event name
    // (unless you're listening on `"all"`, which will cause your callback to
    // receive the true name of the event as the first argument).
    trigger: function(name) {
      if (!this._events) return this;
      var args = slice.call(arguments, 1);
      if (!eventsApi(this, 'trigger', name, args)) return this;
      var events = this._events[name];
      var allEvents = this._events.all;
      if (events) triggerEvents(events, args);
      if (allEvents) triggerEvents(allEvents, arguments);
      return this;
    },

    // Tell this object to stop listening to either specific events ... or
    // to every object it's currently listening to.
    stopListening: function(obj, name, callback) {
      var listeners = this._listeners;
      if (!listeners) return this;
      var deleteListener = !name && !callback;
      if (typeof name === 'object') callback = this;
      if (obj) (listeners = {})[obj._listenerId] = obj;
      for (var id in listeners) {
        listeners[id].off(name, callback, this);
        if (deleteListener) delete this._listeners[id];
      }
      return this;
    }

  };

  // Regular expression used to split event strings.
  var eventSplitter = /\s+/;

  // Implement fancy features of the Events API such as multiple event
  // names `"change blur"` and jQuery-style event maps `{change: action}`
  // in terms of the existing API.
  var eventsApi = function(obj, action, name, rest) {
    if (!name) return true;

    // Handle event maps.
    if (typeof name === 'object') {
      for (var key in name) {
        obj[action].apply(obj, [key, name[key]].concat(rest));
      }
      return false;
    }

    // Handle space separated event names.
    if (eventSplitter.test(name)) {
      var names = name.split(eventSplitter);
      for (var i = 0, l = names.length; i < l; i++) {
        obj[action].apply(obj, [names[i]].concat(rest));
      }
      return false;
    }

    return true;
  };

  // A difficult-to-believe, but optimized internal dispatch function for
  // triggering events. Tries to keep the usual cases speedy (most internal
  // Backbone events have 3 arguments).
  var triggerEvents = function(events, args) {
    var ev, i = -1, l = events.length, a1 = args[0], a2 = args[1], a3 = args[2];
    switch (args.length) {
      case 0: while (++i < l) (ev = events[i]).callback.call(ev.ctx); return;
      case 1: while (++i < l) (ev = events[i]).callback.call(ev.ctx, a1); return;
      case 2: while (++i < l) (ev = events[i]).callback.call(ev.ctx, a1, a2); return;
      case 3: while (++i < l) (ev = events[i]).callback.call(ev.ctx, a1, a2, a3); return;
      default: while (++i < l) (ev = events[i]).callback.apply(ev.ctx, args);
    }
  };

  var listenMethods = {listenTo: 'on', listenToOnce: 'once'};

  // Inversion-of-control versions of `on` and `once`. Tell *this* object to
  // listen to an event in another object ... keeping track of what it's
  // listening to.
  _.each(listenMethods, function(implementation, method) {
    Eventable[method] = function(obj, name, callback) {
      var listeners = this._listeners || (this._listeners = {});
      var id = obj._listenerId || (obj._listenerId = _.uniqueId('l'));
      listeners[id] = obj;
      if (typeof name === 'object') callback = this;
      obj[implementation](name, callback, this);
      return this;
    };
  });

  // Aliases for backwards compatibility.
  Eventable.bind   = Eventable.on;
  Eventable.unbind = Eventable.off;

  if (typeof define !== "undefined" && typeof define === "function" && define.amd) {
    define( "eventable", [], function () { return Eventable; } );
  }

  this.Eventable = Eventable;

})();
/*!
 * Sir Trevor JS v0.3.2
 *
 * Released under the MIT license
 * www.opensource.org/licenses/MIT
 *
 * 2013-12-20
 */


(function ($, _){

  var root = this,
      SirTrevor;

  SirTrevor = root.SirTrevor = {};
  SirTrevor.DEBUG = false;
  SirTrevor.SKIP_VALIDATION = false;

  SirTrevor.version = "0.3.0";
  SirTrevor.LANGUAGE = "en";

  function $element(el) {
    return el instanceof $ ? el : $(el);
  }

  /*
   Define default attributes that can be extended through an object passed to the
   initialize function of SirTrevor
  */

  SirTrevor.DEFAULTS = {
    defaultType: false,
    spinner: {
      className: 'st-spinner',
      lines: 9,
      length: 8,
      width: 3,
      radius: 6,
      color: '#000',
      speed: 1.4,
      trail: 57,
      shadow: false,
      left: '50%',
      top: '50%'
    },
    blockLimit: 0,
    blockTypeLimits: {},
    required: [],
    uploadUrl: '/attachments',
    baseImageUrl: '/sir-trevor-uploads/',
    errorsContainer: undefined
  };

  SirTrevor.BlockMixins = {};
  SirTrevor.Blocks = {};
  SirTrevor.Formatters = {};
  SirTrevor.instances = [];
  SirTrevor.Events = Eventable;

  var formBound = false; // Flag to tell us once we've bound our submit event

  /* Generic function binding utility, used by lots of our classes */
  var FunctionBind = {
    bound: [],
    _bindFunctions: function(){
      if (this.bound.length > 0) {
        _.bindAll.apply(null, _.union([this], this.bound));
      }
    }
  };

  var Renderable = {
    tagName: 'div',
    className: 'sir-trevor__view',
    attributes: {},

    $: function(selector) {
      return this.$el.find(selector);
    },

    render: function() {
      return this;
    },

    destroy: function() {
      if (!_.isUndefined(this.stopListening)) { this.stopListening(); }
      this.$el.remove();
    },

    _ensureElement: function() {
      if (!this.el) {
        var attrs = _.extend({}, _.result(this, 'attributes')),
            html;
        if (this.id) { attrs.id = this.id; }
        if (this.className) { attrs['class'] = this.className; }

        if (attrs.html) {
          html = attrs.html;
          delete attrs.html;
        }
        var $el = $('<' + this.tagName + '>').attr(attrs);
        if (html) { $el.html(html); }
        this._setElement($el);
      } else {
        this._setElement(this.el);
      }
    },

    _setElement: function(element) {
      this.$el = $element(element);
      this.el = this.$el[0];
      return this;
    }
  };

  function diffText(before, after) {
    var pos1 = -1,
        pos2 = -1,
        after_len = after.length,
        before_len = before.length;
  
    for (var i = 0; i < after_len; i++) {
      if (pos1 == -1 && before.substr(i, 1) != after.substr(i, 1)) {
        pos1 = i - 1;
      }
  
      if (pos2 == -1 &&
          before.substr(before_len - i - 1, 1) !=
          after.substr(after_len - i - 1, 1)
        ) {
        pos2 = i;
      }
    }
  
    return {
      result: after.substr(pos1, after_len - pos2 - pos1 + 1),
      pos1: pos1,
      pos2: pos2
    };
  }
  /*
    Drop Area Plugin from @maccman
    http://blog.alexmaccaw.com/svbtle-image-uploading
    --
    Tweaked so we use the parent class of dropzone
  */
  
  (function($){
    function dragEnter(e) {
      e.preventDefault();
    }
  
    function dragOver(e) {
      e.originalEvent.dataTransfer.dropEffect = "copy";
      $(e.currentTarget).addClass('st-drag-over');
      e.preventDefault();
    }
  
    function dragLeave(e) {
      $(e.currentTarget).removeClass('st-drag-over');
      e.preventDefault();
    }
  
    $.fn.dropArea = function(){
      this.bind("dragenter", dragEnter).
           bind("dragover",  dragOver).
           bind("dragleave", dragLeave);
      return this;
    };
  
    $.fn.noDropArea = function(){
      this.unbind("dragenter").
           unbind("dragover").
           unbind("dragleave");
      return this;
    };
  
    $.fn.caretToEnd = function(){
      var range,selection;
  
      range = document.createRange();
      range.selectNodeContents(this[0]);
      range.collapse(false);
  
      selection = window.getSelection();
      selection.removeAllRanges();
      selection.addRange(range);
  
      return this;
    };
  
  })(jQuery);
  /*
    Backbone Inheritence 
    --
    From: https://github.com/documentcloud/backbone/blob/master/backbone.js
    Backbone.js 0.9.2
    (c) 2010-2012 Jeremy Ashkenas, DocumentCloud Inc.
  */
  
  var extend = function(protoProps, staticProps) {
    var parent = this;
    var child;
  
    // The constructor function for the new subclass is either defined by you
    // (the "constructor" property in your `extend` definition), or defaulted
    // by us to simply call the parent's constructor.
    if (protoProps && _.has(protoProps, 'constructor')) {
      child = protoProps.constructor;
    } else {
      child = function(){ return parent.apply(this, arguments); };
    }
  
    // Add static properties to the constructor function, if supplied.
    _.extend(child, parent, staticProps);
  
    // Set the prototype chain to inherit from `parent`, without calling
    // `parent`'s constructor function.
    var Surrogate = function(){ this.constructor = child; };
    Surrogate.prototype = parent.prototype;
    child.prototype = new Surrogate;
  
    // Add prototype properties (instance properties) to the subclass,
    // if supplied.
    if (protoProps) _.extend(child.prototype, protoProps);
  
    // Set a convenience property in case the parent's prototype is needed
    // later.
    child.__super__ = parent.prototype;
  
    return child;
  };
  /*
  * Ultra simple logging
  */
  
  SirTrevor.log = function(message) {
    if (!_.isUndefined(console) && SirTrevor.DEBUG) {
      console.log(message);
    }
  };
  SirTrevor.Locales = {
    en: {
      general: {
        'delete':           'Delete?',
        'drop':             'Drag __block__ here',
        'paste':            'Or paste URL here',
        'upload':           '...or choose a file',
        'close':            'close',
        'position':         'Position',
        'wait':             'Please wait...',
        'link':             'Enter a link'
      },
      errors: {
        'title': "You have the following errors:",
        'validation_fail': "__type__ block is invalid",
        'block_empty': "__name__ must not be empty",
        'type_missing': "You must have a block of type __type__",
        'required_type_empty': "A required block type __type__ is empty",
        'load_fail': "There was a problem loading the contents of the document"
      },
      blocks: {
        text: {
          'title': "Text"
        },
        list: {
          'title': "List"
        },
        quote: {
          'title': "Quote",
          'credit_field': "Credit"
        },
        image: {
          'title': "Image",
          'upload_error': "There was a problem with your upload"
        },
        video: {
          'title': "Video"
        },
        tweet: {
          'title': "Tweet",
          'fetch_error': "There was a problem fetching your tweet"
        },
        embedly: {
          'title': "Embedly",
          'fetch_error': "There was a problem fetching your embed",
          'key_missing': "An Embedly API key must be present"
        },
        heading: {
          'title': "Heading"
        }
      }
    }
  };
  
  if (window.i18n === undefined) {
    // Minimal i18n stub that only reads the English strings
    SirTrevor.log("Using i18n stub");
    window.i18n = {
      t: function(key, options) {
        var parts = key.split(':'), str, obj, part, i;
  
        obj = SirTrevor.Locales[SirTrevor.LANGUAGE];
  
        for(i = 0; i < parts.length; i++) {
          part = parts[i];
  
          if(!_.isUndefined(obj[part])) {
            obj = obj[part];
          }
        }
  
        str = obj;
  
        if (!_.isString(str)) { return ""; }
  
        if (str.indexOf('__') >= 0) {
          _.each(options, function(value, opt) {
            str = str.replace('__' + opt + '__', value);
          });
        }
  
        return str;
      }
    };
  } else {
    SirTrevor.log("Using i18next");
    // Only use i18next when the library has been loaded by the user, keeps
    // dependencies slim
    i18n.init({ resStore: SirTrevor.Locales, fallbackLng: SirTrevor.LANGUAGE,
                ns: { namespaces: ['general', 'blocks'], defaultNs: 'general' }
    });
  }
  //fgnass.github.com/spin.js#v1.2.5
  (function(a,b,c){function g(a,c){var d=b.createElement(a||"div"),e;for(e in c)d[e]=c[e];return d}function h(a){for(var b=1,c=arguments.length;b<c;b++)a.appendChild(arguments[b]);return a}function j(a,b,c,d){var g=["opacity",b,~~(a*100),c,d].join("-"),h=.01+c/d*100,j=Math.max(1-(1-a)/b*(100-h),a),k=f.substring(0,f.indexOf("Animation")).toLowerCase(),l=k&&"-"+k+"-"||"";return e[g]||(i.insertRule("@"+l+"keyframes "+g+"{"+"0%{opacity:"+j+"}"+h+"%{opacity:"+a+"}"+(h+.01)+"%{opacity:1}"+(h+b)%100+"%{opacity:"+a+"}"+"100%{opacity:"+j+"}"+"}",0),e[g]=1),g}function k(a,b){var e=a.style,f,g;if(e[b]!==c)return b;b=b.charAt(0).toUpperCase()+b.slice(1);for(g=0;g<d.length;g++){f=d[g]+b;if(e[f]!==c)return f}}function l(a,b){for(var c in b)a.style[k(a,c)||c]=b[c];return a}function m(a){for(var b=1;b<arguments.length;b++){var d=arguments[b];for(var e in d)a[e]===c&&(a[e]=d[e])}return a}function n(a){var b={x:a.offsetLeft,y:a.offsetTop};while(a=a.offsetParent)b.x+=a.offsetLeft,b.y+=a.offsetTop;return b}var d=["webkit","Moz","ms","O"],e={},f,i=function(){var a=g("style");return h(b.getElementsByTagName("head")[0],a),a.sheet||a.styleSheet}(),o={lines:12,length:7,width:5,radius:10,rotate:0,color:"#000",speed:1,trail:100,opacity:.25,fps:20,zIndex:2e9,className:"spinner",top:"auto",left:"auto"},p=function q(a){if(!this.spin)return new q(a);this.opts=m(a||{},q.defaults,o)};p.defaults={},m(p.prototype,{spin:function(a){this.stop();var b=this,c=b.opts,d=b.el=l(g(0,{className:c.className}),{position:"relative",zIndex:c.zIndex}),e=c.radius+c.length+c.width,h,i;a&&(a.insertBefore(d,a.firstChild||null),i=n(a),h=n(d),l(d,{left:(c.left=="auto"?i.x-h.x+(a.offsetWidth>>1):c.left+e)+"px",top:(c.top=="auto"?i.y-h.y+(a.offsetHeight>>1):c.top+e)+"px"})),d.setAttribute("aria-role","progressbar"),b.lines(d,b.opts);if(!f){var j=0,k=c.fps,m=k/c.speed,o=(1-c.opacity)/(m*c.trail/100),p=m/c.lines;!function q(){j++;for(var a=c.lines;a;a--){var e=Math.max(1-(j+a*p)%m*o,c.opacity);b.opacity(d,c.lines-a,e,c)}b.timeout=b.el&&setTimeout(q,~~(1e3/k))}()}return b},stop:function(){var a=this.el;return a&&(clearTimeout(this.timeout),a.parentNode&&a.parentNode.removeChild(a),this.el=c),this},lines:function(a,b){function e(a,d){return l(g(),{position:"absolute",width:b.length+b.width+"px",height:b.width+"px",background:a,boxShadow:d,transformOrigin:"left",transform:"rotate("+~~(360/b.lines*c+b.rotate)+"deg) translate("+b.radius+"px"+",0)",borderRadius:(b.width>>1)+"px"})}var c=0,d;for(;c<b.lines;c++)d=l(g(),{position:"absolute",top:1+~(b.width/2)+"px",transform:b.hwaccel?"translate3d(0,0,0)":"",opacity:b.opacity,animation:f&&j(b.opacity,b.trail,c,b.lines)+" "+1/b.speed+"s linear infinite"}),b.shadow&&h(d,l(e("#000","0 0 4px #000"),{top:"2px"})),h(a,h(d,e(b.color,"0 0 1px rgba(0,0,0,.1)")));return a},opacity:function(a,b,c){b<a.childNodes.length&&(a.childNodes[b].style.opacity=c)}}),!function(){function a(a,b){return g("<"+a+' xmlns="urn:schemas-microsoft.com:vml" class="spin-vml">',b)}var b=l(g("group"),{behavior:"url(#default#VML)"});!k(b,"transform")&&b.adj?(i.addRule(".spin-vml","behavior:url(#default#VML)"),p.prototype.lines=function(b,c){function f(){return l(a("group",{coordsize:e+" "+e,coordorigin:-d+" "+ -d}),{width:e,height:e})}function k(b,e,g){h(i,h(l(f(),{rotation:360/c.lines*b+"deg",left:~~e}),h(l(a("roundrect",{arcsize:1}),{width:d,height:c.width,left:c.radius,top:-c.width>>1,filter:g}),a("fill",{color:c.color,opacity:c.opacity}),a("stroke",{opacity:0}))))}var d=c.length+c.width,e=2*d,g=-(c.width+c.length)*2+"px",i=l(f(),{position:"absolute",top:g,left:g}),j;if(c.shadow)for(j=1;j<=c.lines;j++)k(j,-2,"progid:DXImageTransform.Microsoft.Blur(pixelradius=2,makeshadow=1,shadowopacity=.3)");for(j=1;j<=c.lines;j++)k(j);return h(b,i)},p.prototype.opacity=function(a,b,c,d){var e=a.firstChild;d=d.shadow&&d.lines||0,e&&b+d<e.childNodes.length&&(e=e.childNodes[b+d],e=e&&e.firstChild,e=e&&e.firstChild,e&&(e.opacity=c))}):f=k(b,"animation")}(),a.Spinner=p})(window,document);
  /*
  * Sir Trevor Editor Store
  * By default we store the complete data on the instances $el
  * We can easily extend this and store it on some server or something
  */
  
  SirTrevor.editorStore = function(editor, method, options) {
    var resp;
  
    options = options || {};
  
    switch(method) {
  
      case "create":
        // Grab our JSON from the textarea and clean any whitespace incase there is a line wrap between the opening and closing textarea tags
        var content = _.trim(editor.$el.val());
        editor.dataStore = { data: [] };
  
        if (content.length > 0) {
          try {
            // Ensure the JSON string has a data element that's an array
            var str = JSON.parse(content);
            if (!_.isUndefined(str.data)) {
              // Set it
              editor.dataStore = str;
            }
          } catch(e) {
            editor.errors.push({ text: i18n.t("errors:load_fail") });
            editor.renderErrors();
  
            console.log('Sorry there has been a problem with parsing the JSON');
            console.log(e);
          }
        }
      break;
  
      case "reset":
        editor.dataStore = { data: [] };
      break;
  
      case "add":
        if (options.data) {
          editor.dataStore.data.push(options.data);
          resp = editor.dataStore;
        }
      break;
  
      case "save":
        // Store to our element
        editor.$el.val((editor.dataStore.data.length > 0) ? JSON.stringify(editor.dataStore) : '');
      break;
  
      case "read":
        resp = editor.dataStore;
      break;
  
    }
  
    if(resp) {
      return resp;
    }
  
  };
  /*
    SirTrevor.Submittable
    --
    We need a global way of setting if the editor can and can't be submitted,
    and a way to disable the submit button and add messages (when appropriate)
    We also need this to be highly extensible so it can be overridden.
    This will be triggered *by anything* so it needs to subscribe to events.
  */
  
  var Submittable = function(){
    this.intialize();
  };
  
  _.extend(Submittable.prototype, {
  
    intialize: function(){
      this.submitBtn = $("input[type='submit']");
  
      var btnTitles = [];
  
      _.each(this.submitBtn, function(btn){
        btnTitles.push($(btn).attr('value'));
      });
  
      this.submitBtnTitles = btnTitles;
      this.canSubmit = true;
      this.globalUploadCount = 0;
      this._bindEvents();
    },
  
    setSubmitButton: function(e, message) {
      this.submitBtn.attr('value', message);
    },
  
    resetSubmitButton: function(){
      _.each(this.submitBtn, function(item, index){
        $(item).attr('value', this.submitBtnTitles[index]);
      }, this);
    },
  
    onUploadStart: function(e){
      this.globalUploadCount++;
      SirTrevor.log('onUploadStart called ' + this.globalUploadCount);
  
      if(this.globalUploadCount === 1) {
        this._disableSubmitButton();
      }
    },
  
    onUploadStop: function(e) {
      this.globalUploadCount = (this.globalUploadCount <= 0) ? 0 : this.globalUploadCount - 1;
  
      SirTrevor.log('onUploadStop called ' + this.globalUploadCount);
  
      if(this.globalUploadCount === 0) {
        this._enableSubmitButton();
      }
    },
  
    onError: function(e){
      SirTrevor.log('onError called');
      this.canSubmit = false;
    },
  
    _disableSubmitButton: function(message){
      this.setSubmitButton(null, message || i18n.t("general:wait"));
      this.submitBtn
        .attr('disabled', 'disabled')
        .addClass('disabled');
    },
  
    _enableSubmitButton: function(){
      this.resetSubmitButton();
      this.submitBtn
        .removeAttr('disabled')
        .removeClass('disabled');
    },
  
    _events : {
      "disableSubmitButton" : "_disableSubmitButton",
      "enableSubmitButton"  : "_enableSubmitButton",
      "setSubmitButton"     : "setSubmitButton",
      "resetSubmitButton"   : "resetSubmitButton",
      "onError"             : "onError",
      "onUploadStart"       : "onUploadStart",
      "onUploadStop"        : "onUploadStop"
    },
  
    _bindEvents: function(){
      _.forEach(this._events, function(callback, type) {
        SirTrevor.EventBus.on(type, this[callback], this);
      }, this);
    }
  
  });
  
  SirTrevor.submittable = function(){
    new Submittable();
  };
  /*
  *   Sir Trevor Uploader
  *   Generic Upload implementation that can be extended for blocks
  */
  
  SirTrevor.fileUploader = function(block, file, success, error) {
  
    SirTrevor.EventBus.trigger("onUploadStart");
  
    var uid  = [block.blockID, (new Date()).getTime(), 'raw'].join('-');
    var data = new FormData();
  
    data.append('attachment[name]', file.name);
    data.append('attachment[file]', file);
    data.append('attachment[uid]', uid);
  
    block.resetMessages();
  
    var callbackSuccess = function(data){
      SirTrevor.log('Upload callback called');
      SirTrevor.EventBus.trigger("onUploadStop");
  
      if (!_.isUndefined(success) && _.isFunction(success)) {
        _.bind(success, block)(data);
      }
    };
  
    var callbackError = function(jqXHR, status, errorThrown){
      SirTrevor.log('Upload callback error called');
      SirTrevor.EventBus.trigger("onUploadStop");
  
      if (!_.isUndefined(error) && _.isFunction(error)) {
        _.bind(error, block)(status);
      }
    };
  
    var xhr = $.ajax({
      url: SirTrevor.DEFAULTS.uploadUrl,
      data: data,
      cache: false,
      contentType: false,
      processData: false,
      dataType: 'json',
      type: 'POST'
    });
  
    block.addQueuedItem(uid, xhr);
  
    xhr.done(callbackSuccess)
       .fail(callbackError)
       .always(_.bind(block.removeQueuedItem, block, uid));
  
    return xhr;
  };
  /*
    Underscore helpers
  */
  
  var url_regex = /^(?:([A-Za-z]+):)?(\/{0,3})([0-9.\-A-Za-z]+)(?::(\d+))?(?:\/([^?#]*))?(?:\?([^#]*))?(?:#(.*))?$/;
  
  _.mixin({
    isURI : function(string) {
      return (url_regex.test(string));
    },
  
    titleize: function(str){
      if (str === null) return '';
      str  = String(str).toLowerCase();
      return str.replace(/(?:^|\s|-)\S/g, function(c){ return c.toUpperCase(); });
    },
  
    classify: function(str){
      return _.titleize(String(str).replace(/[\W_]/g, ' ')).replace(/\s/g, '');
    },
  
    classifyList: function(a){
      return _.map(a, function(i){ return _.classify(i); });
    },
  
    capitalize : function(string) {
      return string.charAt(0).toUpperCase() + string.substring(1).toLowerCase();
    },
  
    underscored: function(str){
      return _.trim(str).replace(/([a-z\d])([A-Z]+)/g, '$1_$2')
                        .replace(/[-\s]+/g, '_').toLowerCase();
    },
  
    trim : function(string) {
      return string.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
    },
  
    reverse: function(str) {
      return str.split("").reverse().join("");
    },
  
    flattern: function(obj) {
      var x = {};
      _.each(obj, function(a,b) {
        x[(_.isArray(obj)) ? a : b] = true;
      });
      return x;
    },
  
    to_slug: function(str) {
      return str
          .toLowerCase()
          .replace(/[^\w ]+/g,'')
          .replace(/ +/g,'-');
    }
  
  });
  
  SirTrevor.toHTML = function(markdown, type) {
    // MD -> HTML
    type = _.classify(type);
  
    var html = markdown,
        shouldWrap = type === "Text";
  
    if(_.isUndefined(shouldWrap)) { shouldWrap = false; }
  
    if (shouldWrap) {
      html = "<div>" + html;
    }
  
    html = html.replace(/\[([^\]]+)\]\(([^\)]+)\)/gm,function(match, p1, p2){
      return "<a href='"+p2+"'>"+p1.replace(/\n/g, '')+"</a>";
    });
  
    // This may seem crazy, but because JS doesn't have a look behind,
    // we reverse the string to regex out the italic items (and bold)
    // and look for something that doesn't start (or end in the reversed strings case)
    // with a slash.
    html = _.reverse(
             _.reverse(html)
             .replace(/_(?!\\)((_\\|[^_])*)_(?=$|[^\\])/gm, function(match, p1) {
                return ">i/<"+ p1.replace(/\n/g, '').replace(/[\s]+$/,'') +">i<";
             })
             .replace(/\*\*(?!\\)((\*\*\\|[^\*\*])*)\*\*(?=$|[^\\])/gm, function(match, p1){
                return ">b/<"+ p1.replace(/\n/g, '').replace(/[\s]+$/,'') +">b<";
             })
            );
  
    html =  html.replace(/^\> (.+)$/mg,"$1");
  
    // Use custom formatters toHTML functions (if any exist)
    var formatName, format;
    for(formatName in SirTrevor.Formatters) {
      if (SirTrevor.Formatters.hasOwnProperty(formatName)) {
        format = SirTrevor.Formatters[formatName];
        // Do we have a toHTML function?
        if (!_.isUndefined(format.toHTML) && _.isFunction(format.toHTML)) {
          html = format.toHTML(html);
        }
      }
    }
  
    // Use custom block toHTML functions (if any exist)
    var block;
    if (SirTrevor.Blocks.hasOwnProperty(type)) {
      block = SirTrevor.Blocks[type];
      // Do we have a toHTML function?
      if (!_.isUndefined(block.prototype.toHTML) && _.isFunction(block.prototype.toHTML)) {
        html = block.prototype.toHTML(html);
      }
    }
  
    if (shouldWrap) {
      html = html.replace(/\n\n/gm, "</div><div><br></div><div>");
      html = html.replace(/\n/gm, "</div><div>");
    }
  
    html = html.replace(/\t/g, "&nbsp;&nbsp;&nbsp;&nbsp;")
               .replace(/\n/g, "<br>")
               .replace(/\*\*/, "")
               .replace(/__/, "");  // Cleanup any markdown characters left
  
    // Replace escaped
    html = html.replace(/\\\*/g, "*")
               .replace(/\\\[/g, "[")
               .replace(/\\\]/g, "]")
               .replace(/\\\_/g, "_")
               .replace(/\\\(/g, "(")
               .replace(/\\\)/g, ")")
               .replace(/\\\-/g, "-");
  
    if (shouldWrap) {
      html += "</div>";
    }
  
    return html;
  };
  SirTrevor.toMarkdown = function(content, type) {
    type = _.classify(type);
  
    var markdown = content;
  
    //Normalise whitespace
    markdown = markdown.replace(/&nbsp;/g," ");
  
    // First of all, strip any additional formatting
    // MSWord, I'm looking at you, punk.
    markdown = markdown.replace(/( class=(")?Mso[a-zA-Z]+(")?)/g, '')
                       .replace(/<!--(.*?)-->/g, '')
                       .replace(/\/\*(.*?)\*\//g, '')
                       .replace(/<(\/)*(meta|link|span|\\?xml:|st1:|o:|font)(.*?)>/gi, '');
  
    var badTags = ['style', 'script', 'applet', 'embed', 'noframes', 'noscript'],
        tagStripper, i;
  
    for (i = 0; i< badTags.length; i++) {
      tagStripper = new RegExp('<'+badTags[i]+'.*?'+badTags[i]+'(.*?)>', 'gi');
      markdown = markdown.replace(tagStripper, '');
    }
  
    // Escape anything in here that *could* be considered as MD
    // Markdown chars we care about: * [] _ () -
    markdown = markdown.replace(/\*/g, "\\*")
                      .replace(/\[/g, "\\[")
                      .replace(/\]/g, "\\]")
                      .replace(/\_/g, "\\_")
                      .replace(/\(/g, "\\(")
                      .replace(/\)/g, "\\)")
                      .replace(/\-/g, "\\-");
  
    var inlineTags = ["em", "i", "strong", "b"];
  
    for (i = 0; i< inlineTags.length; i++) {
      tagStripper = new RegExp('<'+inlineTags[i]+'><br></'+inlineTags[i]+'>', 'gi');
      markdown = markdown.replace(tagStripper, '<br>');
    }
  
    function replaceBolds(match, p1, p2){
      if(_.isUndefined(p2)) { p2 = ''; }
      return "**" + p1.replace(/<(.)?br(.)?>/g, '') + "**" + p2;
    }
  
    function replaceItalics(match, p1, p2){
      if(_.isUndefined(p2)) { p2 = ''; }
      return "_" + p1.replace(/<(.)?br(.)?>/g, '') + "_" + p2;
    }
  
    markdown = markdown.replace(/<(\w+)(?:\s+\w+="[^"]+(?:"\$[^"]+"[^"]+)?")*>\s*<\/\1>/gim, '') //Empty elements
                        .replace(/\n/mg,"")
                        .replace(/<a.*?href=[""'](.*?)[""'].*?>(.*?)<\/a>/gim, function(match, p1, p2){
                          return "[" + p2.trim().replace(/<(.)?br(.)?>/g, '') + "]("+ p1 +")";
                        }) // Hyperlinks
                        .replace(/<strong>(?:\s*)(.*?)(\s)*?<\/strong>/gim, replaceBolds)
                        .replace(/<b>(?:\s*)(.*?)(\s*)?<\/b>/gim, replaceBolds)
                        .replace(/<em>(?:\s*)(.*?)(\s*)?<\/em>/gim, replaceItalics)
                        .replace(/<i>(?:\s*)(.*?)(\s*)?<\/i>/gim, replaceItalics);
  
  
    // Use custom formatters toMarkdown functions (if any exist)
    var formatName, format;
    for(formatName in SirTrevor.Formatters) {
      if (SirTrevor.Formatters.hasOwnProperty(formatName)) {
        format = SirTrevor.Formatters[formatName];
        // Do we have a toMarkdown function?
        if (!_.isUndefined(format.toMarkdown) && _.isFunction(format.toMarkdown)) {
          markdown = format.toMarkdown(markdown);
        }
      }
    }
  
    // Do our generic stripping out
    markdown = markdown.replace(/([^<>]+)(<div>)/g,"$1\n$2")                                 // Divitis style line breaks (handle the first line)
                   .replace(/<div><div>/g,'\n<div>')                                         // ^ (double opening divs with one close from Chrome)
                   .replace(/(?:<div>)([^<>]+)(?:<div>)/g,"$1\n")                            // ^ (handle nested divs that start with content)
                   .replace(/(?:<div>)(?:<br>)?([^<>]+)(?:<br>)?(?:<\/div>)/g,"$1\n")        // ^ (handle content inside divs)
                   .replace(/<\/p>/g,"\n\n")                                               // P tags as line breaks
                   .replace(/<(.)?br(.)?>/g,"\n")                                            // Convert normal line breaks
                   .replace(/&lt;/g,"<").replace(/&gt;/g,">");                                 // Encoding
  
    // Use custom block toMarkdown functions (if any exist)
    var block;
    if (SirTrevor.Blocks.hasOwnProperty(type)) {
      block = SirTrevor.Blocks[type];
      // Do we have a toMarkdown function?
      if (!_.isUndefined(block.prototype.toMarkdown) && _.isFunction(block.prototype.toMarkdown)) {
        markdown = block.prototype.toMarkdown(markdown);
      }
    }
  
    // Strip remaining HTML
    markdown = markdown.replace(/<\/?[^>]+(>|$)/g, "");
  
    return markdown;
  };

  SirTrevor.EventBus = _.extend({}, SirTrevor.Events);

  /* Block Mixins */
  SirTrevor.BlockMixins.Ajaxable = {
  
    mixinName: "Ajaxable",
  
    ajaxable: true,
  
    initializeAjaxable: function(){
      this._queued = [];
    },
  
    addQueuedItem: function(name, deffered) {
      SirTrevor.log("Adding queued item for " + this.blockID + " called " + name);
      this._queued.push({ name: name, deffered: deffered });
    },
  
    removeQueuedItem: function(name) {
      SirTrevor.log("Removing queued item for " + this.blockID + " called " + name);
      this._queued = _.reject(this._queued, function(queued){ return queued.name == name; });
    },
  
    hasItemsInQueue: function() {
      return this._queued.length > 0;
    },
  
    resolveAllInQueue: function() {
      _.each(this._queued, function(item){
        SirTrevor.log("Aborting queued request: " + item.name);
        item.deffered.abort();
      }, this);
    }
  
  };
  SirTrevor.BlockMixins.Controllable = {
  
    mixinName: "Controllable",
  
    initializeControllable: function() {
      SirTrevor.log("Adding controllable to block " + this.blockID);
      this.$control_ui = $('<div>', {'class': 'st-block__control-ui'});
      _.each(
        this.controls,
        function(handler, cmd) {
          // Bind configured handler to current block context
          this.addUiControl(cmd, _.bind(handler, this));
        },
        this
      );
      this.$inner.append(this.$control_ui);
    },
  
    getControlTemplate: function(cmd) {
      return $("<a>",
        { 'data-icon': cmd,
          'class': 'st-icon st-block-control-ui-btn st-block-control-ui-btn--' + cmd
        });
    },
  
    addUiControl: function(cmd, handler) {
      this.$control_ui.append(this.getControlTemplate(cmd));
      this.$control_ui.on('click', '.st-block-control-ui-btn--' + cmd, handler);
    }
  };
  /* Adds drop functionaltiy to this block */
  
  SirTrevor.BlockMixins.Droppable = {
  
    mixinName: "Droppable",
    valid_drop_file_types: ['File', 'Files', 'text/plain', 'text/uri-list'],
  
    initializeDroppable: function() {
      SirTrevor.log("Adding droppable to block " + this.blockID);
  
      this.drop_options = _.extend({}, SirTrevor.DEFAULTS.Block.drop_options, this.drop_options);
  
      var drop_html = $(_.template(this.drop_options.html,
                        { block: this }));
  
      this.$editor.hide();
      this.$inputs.append(drop_html);
      this.$dropzone = drop_html;
  
      // Bind our drop event
      this.$dropzone.dropArea()
                    .bind('drop', _.bind(this._handleDrop, this));
  
      this.$inner.addClass('st-block__inner--droppable');
    },
  
    _handleDrop: function(e) {
      e.preventDefault();
  
      e = e.originalEvent;
  
      var el = $(e.target),
          types = e.dataTransfer.types,
          type, data = [];
  
      el.removeClass('st-dropzone--dragover');
  
      /*
        Check the type we just received,
        delegate it away to our blockTypes to process
      */
  
      if (!_.isUndefined(types) &&
        _.some(types, function(type){ return _.include(this.valid_drop_file_types, type); }, this)) {
        this.onDrop(e.dataTransfer);
      }
  
      SirTrevor.EventBus.trigger('block:content:dropped');
    }
  
  };
  SirTrevor.BlockMixins.Fetchable = {
  
    mixinName: "Fetchable",
  
    initializeFetchable: function(){
      this.withMixin(SirTrevor.BlockMixins.Ajaxable);
    },
  
    fetch: function(options, success, failure){
      var uid = _.uniqueId(this.blockID + "_fetch"),
          xhr = $.ajax(options);
  
      this.resetMessages();
      this.addQueuedItem(uid, xhr);
  
      if(!_.isUndefined(success)) {
        xhr.done(_.bind(success, this));
      }
  
      if(!_.isUndefined(failure)) {
        xhr.fail(_.bind(failure, this));
      }
  
      xhr.always(_.bind(this.removeQueuedItem, this, uid));
  
      return xhr;
    }
  
  };
  SirTrevor.BlockMixins.Pastable = {
  
    mixinName: "Pastable",
  
    initializePastable: function() {
      SirTrevor.log("Adding pastable to block " + this.blockID);
  
      this.paste_options = _.extend({}, SirTrevor.DEFAULTS.Block.paste_options, this.paste_options);
      this.$inputs.append(_.template(this.paste_options.html, this));
  
      this.$('.st-paste-block')
        .bind('click', function(){ $(this).select(); })
        .bind('paste', this._handleContentPaste)
        .bind('submit', this._handleContentPaste);
    }
  
  };
  SirTrevor.BlockMixins.Uploadable = {
  
    mixinName: "Uploadable",
  
    uploadsCount: 0,
  
    initializeUploadable: function() {
      SirTrevor.log("Adding uploadable to block " + this.blockID);
      this.withMixin(SirTrevor.BlockMixins.Ajaxable);
  
      this.upload_options = _.extend({}, SirTrevor.DEFAULTS.Block.upload_options, this.upload_options);
      this.$inputs.append(_.template(this.upload_options.html, this));
    },
  
    uploader: function(file, success, failure){
      return SirTrevor.fileUploader(this, file, success, failure);
    }
  
  };
  SirTrevor.BlockPositioner = (function(){
  
    var template = [
      "<div class='st-block-positioner__inner'>",
      "<span class='st-block-positioner__selected-value'></span>",
      "<select class='st-block-positioner__select'></select>",
      "</div>"
    ].join("\n");
  
    var BlockPositioner = function(block_element, instance_id) {
      this.$block = block_element;
      this.instanceID = instance_id;
      this.total_blocks = 0;
  
      this._ensureElement();
      this._bindFunctions();
  
      this.initialize();
    };
  
    _.extend(BlockPositioner.prototype, FunctionBind, Renderable, {
  
      bound: ['onBlockCountChange', 'onSelectChange', 'toggle', 'show', 'hide'],
  
      className: 'st-block-positioner',
      visibleClass: 'st-block-positioner--is-visible',
  
      initialize: function(){
        this.$el.append(template);
        this.$select = this.$('.st-block-positioner__select');
  
        this.$select.on('change', this.onSelectChange);
  
        SirTrevor.EventBus.on(this.instanceID + ":blocks:count_update", this.onBlockCountChange);
      },
  
      onBlockCountChange: function(new_count) {
        if (new_count != this.total_blocks) {
          this.total_blocks = new_count;
          this.renderPositionList();
        }
      },
  
      onSelectChange: function() {
        var val = this.$select.val();
        if (val !== 0) {
          SirTrevor.EventBus.trigger(this.instanceID + ":blocks:change_position",
                                     this.$block, val, (val == 1 ? 'before' : 'after'));
          this.toggle();
        }
      },
  
      renderPositionList: function() {
        var inner = "<option value='0'>" + i18n.t("general:position") + "</option>";
        for(var i = 1; i <= this.total_blocks; i++) {
          inner += "<option value="+i+">"+i+"</option>";
        }
        this.$select.html(inner);
      },
  
      toggle: function() {
        this.$select.val(0);
        this.$el.toggleClass(this.visibleClass);
      },
  
      show: function(){
        this.$el.addClass(this.visibleClass);
      },
  
      hide: function(){
        this.$el.removeClass(this.visibleClass);
      }
  
    });
  
    return BlockPositioner;
  
  })();
  SirTrevor.BlockReorder = (function(){
  
    var BlockReorder = function(block_element) {
      this.$block = block_element;
  
      this._ensureElement();
      this._bindFunctions();
  
      this.initialize();
    };
  
    _.extend(BlockReorder.prototype, FunctionBind, Renderable, {
  
      bound: ['onMouseDown', 'onClick', 'onDragStart', 'onDragEnd', 'onDrag', 'onDrop'],
  
      className: 'st-block-ui-btn st-block-ui-btn--reorder st-icon',
      tagName: 'a',
  
      attributes: function() {
        return {
          'html': 'reorder',
          'draggable': 'true',
          'data-icon': 'move'
        };
      },
  
      initialize: function() {
        this.$el.bind('mousedown touchstart', this.onMouseDown)
                .bind('click', this.onClick)
                .bind('dragstart', this.onDragStart)
                .bind('dragend touchend', this.onDragEnd)
                .bind('drag touchmove', this.onDrag);
  
        this.$block.dropArea()
                   .bind('drop', this.onDrop);
      },
  
      onMouseDown: function() {
        SirTrevor.EventBus.trigger("block:reorder:down");
      },
  
      onDrop: function(ev) {
        ev.preventDefault();
  
        var dropped_on = this.$block,
            item_id = ev.originalEvent.dataTransfer.getData("text/plain"),
            block = $('#' + item_id);
  
        if (!_.isUndefined(item_id) &&
          !_.isEmpty(block) &&
          dropped_on.attr('id') != item_id &&
          dropped_on.attr('data-instance') == block.attr('data-instance')
        ) {
          dropped_on.after(block);
        }
        SirTrevor.EventBus.trigger("block:reorder:dropped", item_id);
      },
  
      onDragStart: function(ev) {
        var btn = $(ev.currentTarget).parent();
  
        ev.originalEvent.dataTransfer.setDragImage(this.$block[0], btn.position().left, btn.position().top);
        ev.originalEvent.dataTransfer.setData('Text', this.$block.attr('id'));
  
        SirTrevor.EventBus.trigger("block:reorder:dragstart");
        this.$block.addClass('st-block--dragging');
      },
  
      onDragEnd: function(ev) {
        SirTrevor.EventBus.trigger("block:reorder:dragend");
        this.$block.removeClass('st-block--dragging');
      },
  
      onDrag: function(ev){},
  
      onClick: function() {
      },
  
      render: function() {
        return this;
      }
  
    });
  
    return BlockReorder;
  
  })();
  SirTrevor.BlockDeletion = (function(){
  
    var BlockDeletion = function() {
      this._ensureElement();
      this._bindFunctions();
    };
  
    _.extend(BlockDeletion.prototype, FunctionBind, Renderable, {
  
      tagName: 'a',
      className: 'st-block-ui-btn st-block-ui-btn--delete st-icon',
  
      attributes: {
        html: 'delete',
        'data-icon': 'bin'
      }
  
    });
  
    return BlockDeletion;
  
  })();
  var bestNameFromField = function(field) {
    var msg = field.attr("data-st-name") || field.attr("name");
  
    if (!msg) {
      msg = 'Field';
    }
  
    return _.capitalize(msg);
  };
  
  SirTrevor.BlockValidations = {
  
    errors: [],
  
    valid: function(){
      this.performValidations();
      return this.errors.length === 0;
    },
  
    // This method actually does the leg work
    // of running our validators and custom validators
    performValidations: function() {
      this.resetErrors();
  
      var required_fields = this.$('.st-required');
      _.each(required_fields, this.validateField, this);
      _.each(this.validations, this.runValidator, this);
  
      this.$el.toggleClass('st-block--with-errors', this.errors.length > 0);
    },
  
    // Everything in here should be a function that returns true or false
    validations: [],
  
    validateField: function(field) {
      field = $(field);
  
      var content = field.attr('contenteditable') ? field.text() : field.val();
  
      if (content.length === 0) {
        this.setError(field, i18n.t("errors:block_empty",
                                   { name: bestNameFromField(field) }));
      }
    },
  
    runValidator: function(validator) {
      if (!_.isUndefined(this[validator])) {
        this[validator].call(this);
      }
    },
  
    setError: function(field, reason) {
      var $msg = this.addMessage(reason, "st-msg--error");
      field.addClass('st-error');
  
      this.errors.push({ field: field, reason: reason, msg: $msg });
    },
  
    resetErrors: function() {
      _.each(this.errors, function(error){
        error.field.removeClass('st-error');
        error.msg.remove();
      });
  
      this.$messages.removeClass("st-block__messages--is-visible");
      this.errors = [];
    }
  
  };
  SirTrevor.BlockStore = {
  
    blockStorage: {},
  
    createStore: function(blockData) {
      this.blockStorage = {
        type: _.underscored(this.type),
        data: blockData || {}
      };
    },
  
    save: function() { this.toData(); },
  
    saveAndReturnData: function() {
      this.save();
      return this.blockStorage;
    },
  
    saveAndGetData: function() {
      var store = this.saveAndReturnData();
      return store.data || store;
    },
  
    getData: function() {
      return this.blockStorage.data;
    },
  
    setData: function(blockData) {
      SirTrevor.log("Setting data for block " + this.blockID);
      _.extend(this.blockStorage.data, blockData || {});
    },
  
    setAndRetrieveData: function(blockData) {
      this.setData(blockData);
      return this.getData();
    },
  
    setAndLoadData: function(blockData) {
      this.setData(blockData);
      this.beforeLoadingData();
    },
  
    toData: function() {},
    loadData: function() {},
  
    beforeLoadingData: function() {
      SirTrevor.log("loadData for " + this.blockID);
      SirTrevor.EventBus.trigger("editor/block/loadData");
      this.loadData(this.getData());
    },
  
    _loadData: function() {
      SirTrevor.log("_loadData is deprecated and will be removed in the future. Please use beforeLoadingData instead.");
      this.beforeLoadingData();
    },
  
    checkAndLoadData: function() {
      if (!_.isEmpty(this.getData())) {
        this.beforeLoadingData();
      }
    }
  
  };
  SirTrevor.SimpleBlock = (function(){
  
    var SimpleBlock = function(data, instance_id) {
      this.createStore(data);
      this.blockID = _.uniqueId('st-block-');
      this.instanceID = instance_id;
  
      this._ensureElement();
      this._bindFunctions();
  
      this.initialize.apply(this, arguments);
    };
  
    _.extend(SimpleBlock.prototype, FunctionBind, SirTrevor.Events, Renderable, SirTrevor.BlockStore, {
  
      focus : function() {},
  
      valid : function() { return true; },
  
      className: 'st-block',
  
      block_template: _.template(
        "<div class='st-block__inner'><%= editor_html %></div>"
      ),
  
      attributes: function() {
        return {
          'id': this.blockID,
          'data-type': this.type,
          'data-instance': this.instanceID
        };
      },
  
      title: function() {
        return _.titleize(this.type.replace(/[\W_]/g, ' '));
      },
  
      blockCSSClass: function() {
        this.blockCSSClass = _.to_slug(this.type);
        return this.blockCSSClass;
      },
  
      type: '',
  
      class: function() {
        return _.classify(this.type);
      },
  
      editorHTML: '',
  
      initialize: function() {},
  
      onBlockRender: function(){},
      beforeBlockRender: function(){},
  
      _setBlockInner : function() {
        var editor_html = _.result(this, 'editorHTML');
  
        this.$el.append(
          this.block_template({ editor_html: editor_html })
        );
  
        this.$inner = this.$el.find('.st-block__inner');
        this.$inner.bind('click mouseover', function(e){ e.stopPropagation(); });
      },
  
      render: function() {
        this.beforeBlockRender();
  
        this._setBlockInner();
        this._blockPrepare();
  
        return this;
      },
  
      _blockPrepare : function() {
        this._initUI();
        this._initMessages();
  
        this.checkAndLoadData();
  
        this.$el.addClass('st-item-ready');
        this.on("onRender", this.onBlockRender);
        this.save();
      },
  
      _withUIComponent: function(component, className, callback) {
        this.$ui.append(component.render().$el);
        (className && callback) && this.$ui.on('click', className, callback);
      },
  
      _initUI : function() {
        var ui_element = $("<div>", { 'class': 'st-block__ui' });
        this.$inner.append(ui_element);
        this.$ui = ui_element;
        this._initUIComponents();
      },
  
      _initMessages: function() {
        var msgs_element = $("<div>", { 'class': 'st-block__messages' });
        this.$inner.prepend(msgs_element);
        this.$messages = msgs_element;
      },
  
      addMessage: function(msg, additionalClass) {
        var $msg = $("<span>", { html: msg, class: "st-msg " + additionalClass });
        this.$messages.append($msg)
                      .addClass('st-block__messages--is-visible');
        return $msg;
      },
  
      resetMessages: function() {
        this.$messages.html('')
                      .removeClass('st-block__messages--is-visible');
      },
  
      _initUIComponents: function() {
        this._withUIComponent(new SirTrevor.BlockReorder(this.$el));
      }
  
    });
  
    SimpleBlock.fn = SimpleBlock.prototype;
  
    SimpleBlock.extend = extend; // Allow our Block to be extended.
  
    return SimpleBlock;
  
  })();
  SirTrevor.Block = (function(){
  
    var Block = function(data, instance_id) {
      SirTrevor.SimpleBlock.apply(this, arguments);
    };
  
    var delete_template = [
      "<div class='st-block__ui-delete-controls'>",
        "<label class='st-block__delete-label'>",
        "<%= i18n.t('general:delete') %>",
        "</label>",
        "<a class='st-block-ui-btn st-block-ui-btn--confirm-delete st-icon' data-icon='tick'></a>",
        "<a class='st-block-ui-btn st-block-ui-btn--deny-delete st-icon' data-icon='close'></a>",
      "</div>"
    ].join("\n");
  
    var drop_options = {
      html: ['<div class="st-block__dropzone">',
             '<span class="st-icon"><%= _.result(block, "icon_name") %></span>',
             '<p><%= i18n.t("general:drop", { block: "<span>" + _.result(block, "title") + "</span>" }) %>',
             '</p></div>'].join('\n'),
      re_render_on_reorder: false
    };
  
    var paste_options = {
      html: ['<input type="text" placeholder="<%= i18n.t("general:paste") %>"',
             ' class="st-block__paste-input st-paste-block">'].join('')
    };
  
    var upload_options = {
      html: [
        '<div class="st-block__upload-container">',
        '<input type="file" type="st-file-upload">',
        '<button class="st-upload-btn"><%= i18n.t("general:upload") %></button>',
        '</div>'
      ].join('\n')
    };
  
    SirTrevor.DEFAULTS.Block = {
      drop_options: drop_options,
      paste_options: paste_options,
      upload_options: upload_options
    };
  
    _.extend(Block.prototype, SirTrevor.SimpleBlock.fn, SirTrevor.BlockValidations, {
  
      bound: ["_handleContentPaste", "_onFocus", "_onBlur", "onDrop", "onDeleteClick",
              "clearInsertedStyles", "getSelectionForFormatter", "onBlockRender"],
  
      className: 'st-block st-icon--add',
  
      attributes: function() {
        return _.extend(SirTrevor.SimpleBlock.fn.attributes.call(this), {
          'data-icon-after' : "add"
        });
      },
  
      icon_name: 'default',
  
      validationFailMsg: function() {
        return i18n.t('errors:validation_fail', { type: this.title() });
      },
  
      editorHTML: '<div class="st-block__editor"></div>',
  
      toolbarEnabled: true,
  
      droppable: false,
      pastable: false,
      uploadable: false,
      fetchable: false,
      ajaxable: false,
  
      drop_options: {},
      paste_options: {},
      upload_options: {},
  
      formattable: true,
  
      _previousSelection: '',
  
      initialize: function() {},
  
      toMarkdown: function(markdown){ return markdown; },
      toHTML: function(html){ return html; },
  
      withMixin: function(mixin) {
        if (!_.isObject(mixin)) { return; }
  
        var initializeMethod = "initialize" + mixin.mixinName;
  
        if (_.isUndefined(this[initializeMethod])) {
          _.extend(this, mixin);
          this[initializeMethod]();
        }
      },
  
      render: function() {
        this.beforeBlockRender();
        this._setBlockInner();
  
        this.$editor = this.$inner.children().first();
  
        if(this.droppable || this.pastable || this.uploadable) {
          var input_html = $("<div>", { 'class': 'st-block__inputs' });
          this.$inner.append(input_html);
          this.$inputs = input_html;
        }
  
        if (this.hasTextBlock) { this._initTextBlocks(); }
        if (this.droppable) { this.withMixin(SirTrevor.BlockMixins.Droppable); }
        if (this.pastable) { this.withMixin(SirTrevor.BlockMixins.Pastable); }
        if (this.uploadable) { this.withMixin(SirTrevor.BlockMixins.Uploadable); }
        if (this.fetchable) { this.withMixin(SirTrevor.BlockMixins.Fetchable); }
        if (this.controllable) { this.withMixin(SirTrevor.BlockMixins.Controllable); }
  
        if (this.formattable) { this._initFormatting(); }
  
        this._blockPrepare();
  
        return this;
      },
  
      remove: function() {
        if (this.ajaxable) {
          this.resolveAllInQueue();
        }
  
        this.$el.remove();
      },
  
      loading: function() {
        if(!_.isUndefined(this.spinner)) { this.ready(); }
  
        this.spinner = new Spinner(SirTrevor.DEFAULTS.spinner);
        this.spinner.spin(this.$el[0]);
  
        this.$el.addClass('st--is-loading');
      },
  
      ready: function() {
        this.$el.removeClass('st--is-loading');
        if (!_.isUndefined(this.spinner)) {
          this.spinner.stop();
          delete this.spinner;
        }
      },
  
      /*
        Generic toData implementation.
        Can be overwritten, although hopefully this will cover most situations
      */
      toData: function() {
        SirTrevor.log("toData for " + this.blockID);
  
        var bl = this.$el,
            dataObj = {};
  
        /* Simple to start. Add conditions later */
        if (this.hasTextBlock()) {
          var content = this.getTextBlock().html();
          if (content.length > 0) {
            dataObj.text = SirTrevor.toMarkdown(content, this.type);
          }
        }
  
        // Add any inputs to the data attr
        if(this.$(':input').not('.st-paste-block').length > 0) {
          this.$(':input').each(function(index,input){
            if (input.getAttribute('name')) {
              dataObj[input.getAttribute('name')] = input.value;
            }
          });
        }
  
        // Set
        if(!_.isEmpty(dataObj)) {
          this.setData(dataObj);
        }
      },
  
      /* Generic implementation to tell us when the block is active */
      focus: function() {
        this.getTextBlock().focus();
      },
  
      blur: function() {
        this.getTextBlock().blur();
      },
  
      onFocus: function() {
        this.getTextBlock().bind('focus', this._onFocus);
      },
  
      onBlur: function() {
        this.getTextBlock().bind('blur', this._onBlur);
      },
  
      /*
      * Event handlers
      */
  
      _onFocus: function() {
        this.trigger('blockFocus', this.$el);
      },
  
      _onBlur: function() {},
  
      onDrop: function(dataTransferObj) {},
  
      onDeleteClick: function(ev) {
        ev.preventDefault();
  
        var onDeleteConfirm = function(e) {
          e.preventDefault();
          this.trigger('removeBlock', this.blockID);
        };
  
        var onDeleteDeny = function(e) {
          e.preventDefault();
          this.$el.removeClass('st-block--delete-active');
          $delete_el.remove();
        };
  
        if (this.isEmpty()) {
          onDeleteConfirm.call(this, new Event('click'));
          return;
        }
  
        this.$inner.append(_.template(delete_template));
        this.$el.addClass('st-block--delete-active');
  
        var $delete_el = this.$inner.find('.st-block__ui-delete-controls');
  
        this.$inner.on('click', '.st-block-ui-btn--confirm-delete',
                        _.bind(onDeleteConfirm, this))
                   .on('click', '.st-block-ui-btn--deny-delete',
                        _.bind(onDeleteDeny, this));
      },
  
      pastedMarkdownToHTML: function(content) {
        return SirTrevor.toHTML(SirTrevor.toMarkdown(content, this.type), this.type);
      },
  
      onContentPasted: function(event, target){
        target.html(this.pastedMarkdownToHTML(target[0].innerHTML));
        this.getTextBlock().caretToEnd();
      },
  
      beforeLoadingData: function() {
        this.loading();
  
        if(this.droppable || this.uploadable || this.pastable) {
          this.$editor.show();
          this.$inputs.hide();
        }
  
        SirTrevor.SimpleBlock.fn.beforeLoadingData.call(this);
  
        this.ready();
      },
  
      _handleContentPaste: function(ev) {
        var target = $(ev.currentTarget);
  
        _.delay(_.bind(this.onContentPasted, this, ev, target), 0);
      },
  
      _getBlockClass: function() {
        return 'st-block--' + this.className;
      },
  
      /*
      * Init functions for adding functionality
      */
  
      _initUIComponents: function() {
  
        var positioner = new SirTrevor.BlockPositioner(this.$el, this.instanceID);
  
        this._withUIComponent(
          positioner, '.st-block-ui-btn--reorder', positioner.toggle
        );
  
        this._withUIComponent(
          new SirTrevor.BlockReorder(this.$el)
        );
  
        this._withUIComponent(
          new SirTrevor.BlockDeletion(), '.st-block-ui-btn--delete', this.onDeleteClick
        );
  
        this.onFocus();
        this.onBlur();
      },
  
      _initFormatting: function() {
        // Enable formatting keyboard input
        var formatter;
        for (var name in SirTrevor.Formatters) {
          if (SirTrevor.Formatters.hasOwnProperty(name)) {
            formatter = SirTrevor.Formatters[name];
            if (!_.isUndefined(formatter.keyCode)) {
              formatter._bindToBlock(this.$el);
            }
          }
        }
      },
  
      _initTextBlocks: function() {
        this.getTextBlock()
          .bind('paste', this._handleContentPaste)
          .bind('keyup', this.getSelectionForFormatter)
          .bind('mouseup', this.getSelectionForFormatter)
          .bind('DOMNodeInserted', this.clearInsertedStyles);
      },
  
      getSelectionForFormatter: function() {
        _.defer(function(){
          var selection = window.getSelection(),
             selectionStr = selection.toString().trim();
  
          if (selectionStr === '') {
            SirTrevor.EventBus.trigger('formatter:hide');
          } else {
            SirTrevor.EventBus.trigger('formatter:positon');
          }
        });
       },
  
      clearInsertedStyles: function(e) {
        var target = e.target;
        target.removeAttribute('style'); // Hacky fix for Chrome.
      },
  
      hasTextBlock: function() {
        return this.getTextBlock().length > 0;
      },
  
      getTextBlock: function() {
        if (_.isUndefined(this.text_block)) {
          this.text_block = this.$('.st-text-block');
        }
  
        return this.text_block;
      },
  
      isEmpty: function() {
        return _.isEmpty(this.saveAndGetData());
      }
  
    });
  
    Block.extend = extend; // Allow our Block to be extended.
  
    return Block;
  
  })();
  SirTrevor.Formatter = (function(){
  
    var Format = function(options){
      this.formatId = _.uniqueId('format-');
      this._configure(options || {});
      this.initialize.apply(this, arguments);
    };
  
    var formatOptions = ["title", "className", "cmd", "keyCode", "param", "onClick", "toMarkdown", "toHTML"];
  
    _.extend(Format.prototype, {
  
      title: '',
      className: '',
      cmd: null,
      keyCode: null,
      param: null,
  
      toMarkdown: function(markdown){ return markdown; },
      toHTML: function(html){ return html; },
  
      initialize: function(){},
  
      _configure: function(options) {
        if (this.options) options = _.extend({}, this.options, options);
        for (var i = 0, l = formatOptions.length; i < l; i++) {
          var attr = formatOptions[i];
          if (options[attr]) this[attr] = options[attr];
        }
        this.options = options;
      },
  
      isActive: function() {
        return document.queryCommandState(this.cmd);
      },
  
      _bindToBlock: function(block) {
        var formatter = this,
            ctrlDown = false;
  
        block
          .on('keyup','.st-text-block', function(ev) {
            if(ev.which == 17 || ev.which == 224 || ev.which == 91) {
              ctrlDown = false;
            }
          })
          .on('keydown','.st-text-block', { formatter: formatter }, function(ev) {
            if(ev.which == 17 || ev.which == 224 || ev.which == 91) {
              ctrlDown = true;
            }
  
            if(ev.which == ev.data.formatter.keyCode && ctrlDown === true) {
              document.execCommand(ev.data.formatter.cmd, false, true);
              ev.preventDefault();
              ctrlDown = false;
            }
          });
      }
    });
  
    Format.extend = extend; // Allow our Formatters to be extended.
  
    return Format;
  
  })();

  /* Default Blocks */
  /*
    Block Quote
  */
  
  SirTrevor.Blocks.Quote = (function(){
  
    var template = _.template([
      '<blockquote class="st-required st-text-block" contenteditable="true"></blockquote>',
      '<label class="st-input-label"> <%= i18n.t("blocks:quote:credit_field") %></label>',
      '<input maxlength="140" name="cite" placeholder="<%= i18n.t("blocks:quote:credit_field") %>"',
      ' class="st-input-string st-required js-cite-input" type="text" />'
    ].join("\n"));
  
    return SirTrevor.Block.extend({
  
      type: "quote",
  
      title: function(){ return i18n.t('blocks:quote:title'); },
  
      icon_name: 'quote',
  
      editorHTML: function() {
        return template(this);
      },
  
      loadData: function(data){
        this.getTextBlock().html(SirTrevor.toHTML(data.text, this.type));
        this.$('.js-cite-input').val(data.cite);
      },
  
      toMarkdown: function(markdown) {
        return markdown.replace(/^(.+)$/mg,"> $1");
      }
  
    });
  
  })();
  /*
    Heading Block
  */
  SirTrevor.Blocks.Heading = SirTrevor.Block.extend({
  
    type: 'Heading',
  
    title: function(){ return i18n.t('blocks:heading:title'); },
  
    editorHTML: '<div class="st-required st-text-block st-text-block--heading" contenteditable="true"></div>',
  
    icon_name: 'heading',
  
    loadData: function(data){
      this.getTextBlock().html(SirTrevor.toHTML(data.text, this.type));
    }
  });
  /*
    Simple Image Block
  */
  
  SirTrevor.Blocks.Image = SirTrevor.Block.extend({
  
    type: "image",
    title: function() { return i18n.t('blocks:image:title'); },
  
    droppable: true,
    uploadable: true,
  
    icon_name: 'image',
  
    loadData: function(data){
      // Create our image tag
      this.$editor.html($('<img>', { src: data.file.url }));
    },
  
    onBlockRender: function(){
      /* Setup the upload button */
      this.$inputs.find('button').bind('click', function(ev){ ev.preventDefault(); });
      this.$inputs.find('input').on('change', _.bind(function(ev){
        this.onDrop(ev.currentTarget);
      }, this));
    },
  
    onDrop: function(transferData){
      var file = transferData.files[0],
          urlAPI = (typeof URL !== "undefined") ? URL : (typeof webkitURL !== "undefined") ? webkitURL : null;
  
      // Handle one upload at a time
      if (/image/.test(file.type)) {
        this.loading();
        // Show this image on here
        this.$inputs.hide();
        this.$editor.html($('<img>', { src: urlAPI.createObjectURL(file) })).show();
  
        // Upload!
        SirTrevor.EventBus.trigger('setSubmitButton', ['Please wait...']);
        this.uploader(
          file,
          function(data) {
            this.setData(data);
            this.ready();
          },
          function(error){
            this.addMessage(i18n.t('blocks:image:upload_error'));
            this.ready();
          }
        );
      }
    }
  });
  /*
    Text Block
  */
  SirTrevor.Blocks.Text = SirTrevor.Block.extend({
  
    type: "text",
  
    title: function() { return i18n.t('blocks:text:title'); },
  
    editorHTML: '<div class="st-required st-text-block" contenteditable="true"></div>',
  
    icon_name: 'text',
  
    loadData: function(data){
      this.getTextBlock().html(SirTrevor.toHTML(data.text, this.type));
    }
  });
  SirTrevor.Blocks.Tweet = (function(){
  
    var tweet_template = _.template([
      "<blockquote class='twitter-tweet' align='center'>",
      "<p><%= text %></p>",
      "&mdash; <%= user.name %> (@<%= user.screen_name %>)",
      "<a href='<%= status_url %>' data-datetime='<%= created_at %>'><%= created_at %></a>",
      "</blockquote>",
      '<script src="//platform.twitter.com/widgets.js" charset="utf-8"></script>'
    ].join("\n"));
  
    return SirTrevor.Block.extend({
  
      type: "tweet",
      droppable: true,
      pastable: true,
      fetchable: true,
  
      drop_options: {
        re_render_on_reorder: true
      },
  
      title: function(){ return i18n.t('blocks:tweet:title'); },
  
      fetchUrl: function(tweetID) {
        return "/tweets/?tweet_id=" + tweetID;
      },
  
      icon_name: 'twitter',
  
      loadData: function(data) {
        if (_.isUndefined(data.status_url)) { data.status_url = ''; }
        this.$inner.find('iframe').remove();
        this.$inner.prepend(tweet_template(data));
      },
  
      onContentPasted: function(event){
        // Content pasted. Delegate to the drop parse method
        var input = $(event.target),
            val = input.val();
  
        // Pass this to the same handler as onDrop
        this.handleTwitterDropPaste(val);
      },
  
      handleTwitterDropPaste: function(url){
        if (!this.validTweetUrl(url)) {
          SirTrevor.log("Invalid Tweet URL");
          return;
        }
  
        // Twitter status
        var tweetID = url.match(/[^\/]+$/);
        if (!_.isEmpty(tweetID)) {
          this.loading();
          tweetID = tweetID[0];
  
          var ajaxOptions = {
            url: this.fetchUrl(tweetID),
            dataType: "json"
          };
  
          this.fetch(ajaxOptions, this.onTweetSuccess, this.onTweetFail);
        }
      },
  
      validTweetUrl: function(url) {
        return (_.isURI(url) &&
                url.indexOf("twitter") !== -1 &&
                url.indexOf("status") !== -1);
      },
  
      onTweetSuccess: function(data) {
        // Parse the twitter object into something a bit slimmer..
        var obj = {
          user: {
            profile_image_url: data.user.profile_image_url,
            profile_image_url_https: data.user.profile_image_url_https,
            screen_name: data.user.screen_name,
            name: data.user.name
          },
          id: data.id_str,
          text: data.text,
          created_at: data.created_at,
          entities: data.entities,
          status_url: "https://twitter.com/" + data.user.screen_name + "/status/" + data.id_str
        };
  
        this.setAndLoadData(obj);
        this.ready();
      },
  
      onTweetFail: function() {
        this.addMessage(i18n.t("blocks:tweet:fetch_error"));
        this.ready();
      },
  
      onDrop: function(transferData){
        var url = transferData.getData('text/plain');
        this.handleTwitterDropPaste(url);
      }
    });
  
  })();
  /*
    Unordered List
  */
  
  SirTrevor.Blocks.List = (function() {
  
    var template = '<div class="st-text-block st-required" contenteditable="true"><ul><li></li></ul></div>';
  
    return SirTrevor.Block.extend({
  
      type: 'list',
  
      title: function() { return i18n.t('blocks:list:title'); },
  
      icon_name: 'list',
  
      editorHTML: function() {
        return _.template(template, this);
      },
  
      loadData: function(data){
        this.getTextBlock().html("<ul>" + SirTrevor.toHTML(data.text, this.type) + "</ul>");
      },
  
      onBlockRender: function() {
        this.checkForList = _.bind(this.checkForList, this);
        this.getTextBlock().on('click keyup', this.checkForList);
      },
  
      checkForList: function() {
        if (this.$('ul').length === 0) {
          document.execCommand("insertUnorderedList", false, false);
        }
      },
  
      toMarkdown: function(markdown) {
        return markdown.replace(/<\/li>/mg,"\n")
                       .replace(/<\/?[^>]+(>|$)/g, "")
                       .replace(/^(.+)$/mg," - $1");
      },
  
      toHTML: function(html) {
        html = html.replace(/^ - (.+)$/mg,"<li>$1</li>")
                   .replace(/\n/mg, "");
  
        return html;
      },
  
      onContentPasted: function(event, target) {
        var replace = this.pastedMarkdownToHTML(target[0].innerHTML),
            list = this.$('ul').html(replace);
  
        this.getTextBlock().caretToEnd();
      },
  
      isEmpty: function() {
        return _.isEmpty(this.saveAndGetData().text);
      }
  
    });
  
  })();
  SirTrevor.Blocks.Video = (function(){
  
    return SirTrevor.Block.extend({
  
      // more providers at https://gist.github.com/jeffling/a9629ae28e076785a14f
      providers: {
        vimeo: {
          regex: /(?:http[s]?:\/\/)?(?:www.)?vimeo.com\/(.+)/,
          html: "<iframe src=\"{{protocol}}//player.vimeo.com/video/{{remote_id}}?title=0&byline=0\" width=\"580\" height=\"320\" frameborder=\"0\"></iframe>"
        },
        youtube: {
          regex: /(?:http[s]?:\/\/)?(?:www.)?(?:(?:youtube.com\/watch\?(?:.*)(?:v=))|(?:youtu.be\/))([^&].+)/,
          html: "<iframe src=\"{{protocol}}//www.youtube.com/embed/{{remote_id}}\" width=\"580\" height=\"320\" frameborder=\"0\" allowfullscreen></iframe>"
        }
      },
  
      type: 'video',
      title: function() { return i18n.t('blocks:video:title'); },
  
      droppable: true,
      pastable: true,
  
      icon_name: 'video',
  
      loadData: function(data){
        if (!this.providers.hasOwnProperty(data.source)) { return; }
  
        if (this.providers[data.source].square) {
          this.$editor.addClass('st-block__editor--with-square-media');
        } else {
          this.$editor.addClass('st-block__editor--with-sixteen-by-nine-media');
        }
  
        var embed_string = this.providers[data.source].html
          .replace('{{protocol}}', window.location.protocol)
          .replace('{{remote_id}}', data.remote_id)
          .replace('{{width}}', this.$editor.width()); // for videos that can't resize automatically like vine
  
        this.$editor.html(embed_string);
      },
  
      onContentPasted: function(event){
        this.handleDropPaste($(event.target).val());
      },
  
      handleDropPaste: function(url){
        if(!_.isURI(url)) {
          return;
        }
  
        var match, data;
  
        _.each(this.providers, function(provider, index) {
          match = provider.regex.exec(url);
  
          if(match !== null && !_.isUndefined(match[1])) {
            data = {
              source: index,
              remote_id: match[1]
            };
  
            this.setAndLoadData(data);
          }
        }, this);
      },
  
      onDrop: function(transferData){
        var url = transferData.getData('text/plain');
        this.handleDropPaste(url);
      }
    });
  
  })();
  /* Default Formatters */
  /* Our base formatters */
  (function(){
  
    var Bold = SirTrevor.Formatter.extend({
      title: "bold",
      cmd: "bold",
      keyCode: 66,
      text : "B"
    });
  
    var Italic = SirTrevor.Formatter.extend({
      title: "italic",
      cmd: "italic",
      keyCode: 73,
      text : "i"
    });
  
    var Link = SirTrevor.Formatter.extend({
  
      title: "link",
      iconName: "link",
      cmd: "CreateLink",
      text : "link",
  
      onClick: function() {
  
        var link = prompt(i18n.t("general:link")),
            link_regex = /((ftp|http|https):\/\/.)|mailto(?=\:[-\.\w]+@)/;
  
        if(link && link.length > 0) {
  
         if (!link_regex.test(link)) {
           link = "http://" + link;
         }
  
         document.execCommand(this.cmd, false, link);
        }
      },
  
      isActive: function() {
        var selection = window.getSelection(),
            node;
  
        if (selection.rangeCount > 0) {
          node = selection.getRangeAt(0)
                          .startContainer
                          .parentNode;
        }
  
        return (node && node.nodeName == "A");
      }
    });
  
    var UnLink = SirTrevor.Formatter.extend({
      title: "unlink",
      iconName: "link",
      cmd: "unlink",
      text : "link"
    });
  
    /*
      Create our formatters and add a static reference to them
    */
    SirTrevor.Formatters.Bold = new Bold();
    SirTrevor.Formatters.Italic = new Italic();
    SirTrevor.Formatters.Link = new Link();
    SirTrevor.Formatters.Unlink = new UnLink();
  
  })();
  /* Marker */
  SirTrevor.BlockControl = (function(){
  
    var BlockControl = function(type, instance_scope) {
      this.type = type;
      this.instance_scope = instance_scope;
      this.block_type = SirTrevor.Blocks[this.type].prototype;
      this.can_be_rendered = this.block_type.toolbarEnabled;
  
      this._ensureElement();
    };
  
    _.extend(BlockControl.prototype, FunctionBind, Renderable, SirTrevor.Events, {
  
      tagName: 'a',
      className: "st-block-control",
  
      attributes: function() {
        return {
          'data-type': this.block_type.type
        };
      },
  
      render: function() {
        this.$el.html('<span class="st-icon">'+ _.result(this.block_type, 'icon_name') +'</span>' + _.result(this.block_type, 'title'));
        return this;
      }
    });
  
    return BlockControl;
  
  })();
  /*
    SirTrevor Block Controls
    --
    Gives an interface for adding new Sir Trevor blocks.
  */
  
  SirTrevor.BlockControls = (function(){
  
    var BlockControls = function(available_types, instance_scope) {
      this.instance_scope = instance_scope;
      this.available_types = available_types || [];
      this._ensureElement();
      this._bindFunctions();
      this.initialize();
    };
  
    _.extend(BlockControls.prototype, FunctionBind, Renderable, SirTrevor.Events, {
  
      bound: ['handleControlButtonClick'],
      block_controls: null,
  
      className: "st-block-controls",
  
      html: "<a class='st-icon st-icon--close'>" + i18n.t("general:close") + "</a>",
  
      initialize: function() {
        for(var block_type in this.available_types) {
          if (SirTrevor.Blocks.hasOwnProperty(block_type)) {
            var block_control = new SirTrevor.BlockControl(block_type, this.instance_scope);
            if (block_control.can_be_rendered) {
              this.$el.append(block_control.render().$el);
            }
          }
        }
  
        this.$el.delegate('.st-block-control', 'click', this.handleControlButtonClick);
      },
  
      show: function() {
        this.$el.addClass('st-block-controls--active');
  
        SirTrevor.EventBus.trigger('block:controls:shown');
      },
  
      hide: function() {
        this.$el.removeClass('st-block-controls--active');
  
        SirTrevor.EventBus.trigger('block:controls:hidden');
      },
  
      handleControlButtonClick: function(e) {
        e.stopPropagation();
  
        this.trigger('createBlock', $(e.currentTarget).attr('data-type'));
      }
  
    });
  
    return BlockControls;
  
  })();
  
  
  /*
    SirTrevor Floating Block Controls
    --
    Draws the 'plus' between blocks
  */
  
  SirTrevor.FloatingBlockControls = (function(){
  
    var FloatingBlockControls = function(wrapper, instance_id) {
      this.$wrapper = wrapper;
      this.instance_id = instance_id;
  
      this._ensureElement();
      this._bindFunctions();
  
      this.initialize();
    };
  
    _.extend(FloatingBlockControls.prototype, FunctionBind, Renderable, SirTrevor.Events, {
  
      className: "st-block-controls__top",
  
      attributes: function() {
        return {
          'data-icon': 'add'
        };
      },
  
      bound: ['handleBlockMouseOut', 'handleBlockMouseOver', 'handleBlockClick', 'onDrop'],
  
      initialize: function() {
        this.$el.on('click', this.handleBlockClick)
                .dropArea()
                .bind('drop', this.onDrop);
  
        this.$wrapper.on('mouseover', '.st-block', this.handleBlockMouseOver)
                     .on('mouseout', '.st-block', this.handleBlockMouseOut)
                     .on('click', '.st-block--with-plus', this.handleBlockClick);
      },
  
      onDrop: function(ev) {
        ev.preventDefault();
  
        var dropped_on = this.$el,
            item_id = ev.originalEvent.dataTransfer.getData("text/plain"),
            block = $('#' + item_id);
  
        if (!_.isUndefined(item_id) &&
          !_.isEmpty(block) &&
          dropped_on.attr('id') != item_id &&
          this.instance_id == block.attr('data-instance')
        ) {
          dropped_on.after(block);
        }
  
        SirTrevor.EventBus.trigger("block:reorder:dropped", item_id);
      },
  
      handleBlockMouseOver: function(e) {
        var block = $(e.currentTarget);
  
        if (!block.hasClass('st-block--with-plus')) {
          block.addClass('st-block--with-plus');
        }
      },
  
      handleBlockMouseOut: function(e) {
        var block = $(e.currentTarget);
  
        if (block.hasClass('st-block--with-plus')) {
          block.removeClass('st-block--with-plus');
        }
      },
  
      handleBlockClick: function(e) {
        e.stopPropagation();
  
        var block = $(e.currentTarget);
        this.trigger('showBlockControls', block);
      }
  
    });
  
    return FloatingBlockControls;
  
  })();
  /* FormatBar */
  /*
    Format Bar
    --
    Displayed on focus on a text area.
    Renders with all available options for the editor instance
  */
  
  SirTrevor.FormatBar = (function(){
  
    var FormatBar = function(options) {
      this.options = _.extend({}, SirTrevor.DEFAULTS.formatBar, options || {});
      this._ensureElement();
      this._bindFunctions();
  
      this.initialize.apply(this, arguments);
    };
  
    _.extend(FormatBar.prototype, FunctionBind, SirTrevor.Events, Renderable, {
  
      className: 'st-format-bar',
  
      bound: ["onFormatButtonClick", "renderBySelection", "hide"],
  
      initialize: function() {
        var formatName, format, btn;
        this.$btns = [];
  
        for (formatName in SirTrevor.Formatters) {
          if (SirTrevor.Formatters.hasOwnProperty(formatName)) {
            format = SirTrevor.Formatters[formatName];
            btn = $("<button>", {
                    'class': 'st-format-btn st-format-btn--' + formatName + ' ' + (format.iconName ? 'st-icon' : ''),
                    'text': format.text,
                    'data-type': formatName,
                    'data-cmd': format.cmd
                  });
  
            this.$btns.push(btn);
            btn.appendTo(this.$el);
          }
        }
  
        this.$b = $(document);
        this.$el.bind('click', '.st-format-btn', this.onFormatButtonClick);
      },
  
      hide: function() {
        this.$el.removeClass('st-format-bar--is-ready');
      },
  
      show: function() {
        this.$el.addClass('st-format-bar--is-ready');
      },
  
      remove: function(){ this.$el.remove(); },
  
      renderBySelection: function(rectangles) {
  
        var selection = window.getSelection(),
            range = selection.getRangeAt(0),
            boundary = range.getBoundingClientRect(),
            coords = {};
  
        coords.top = boundary.top + 20 + window.pageYOffset - this.$el.height() + 'px';
        coords.left = ((boundary.left + boundary.right) / 2) - (this.$el.width() / 2) + 'px';
  
        this.highlightSelectedButtons();
        this.show();
  
        this.$el.css(coords);
      },
  
      highlightSelectedButtons: function() {
        var formatter;
        _.each(this.$btns, function($btn) {
          formatter = SirTrevor.Formatters[$btn.attr('data-type')];
          $btn.toggleClass("st-format-btn--is-active",
                           formatter.isActive());
        }, this);
      },
  
      onFormatButtonClick: function(ev){
        ev.stopPropagation();
  
        var btn = $(ev.target),
            format = SirTrevor.Formatters[btn.attr('data-type')];
  
        if (_.isUndefined(format)) return false;
  
        // Do we have a click function defined on this formatter?
        if(!_.isUndefined(format.onClick) && _.isFunction(format.onClick)) {
          format.onClick(); // Delegate
        } else {
          // Call default
          document.execCommand(btn.attr('data-cmd'), false, format.param);
        }
  
        this.highlightSelectedButtons();
        return false;
      }
  
    });
  
    return FormatBar;
  
  })();
  /*
    Sir Trevor Editor
    --
    Represents one Sir Trevor editor instance (with multiple blocks)
    Each block references this instance.
    BlockTypes are global however.
  */
  
  SirTrevor.Editor = (function(){
  
    var SirTrevorEditor = function(options) {
      this.initialize(options);
    };
  
    _.extend(SirTrevorEditor.prototype, FunctionBind, SirTrevor.Events, {
  
      bound: ['onFormSubmit', 'showBlockControls', 'hideAllTheThings', 'hideBlockControls',
              'onNewBlockCreated', 'changeBlockPosition', 'onBlockDragStart', 'onBlockDragEnd',
              'removeBlockDragOver', 'onBlockDropped', 'createBlock'],
  
      events: {
        'block:reorder:down':       'hideBlockControls',
        'block:reorder:dragstart':  'onBlockDragStart',
        'block:reorder:dragend':    'onBlockDragEnd',
        'block:content:dropped':    'removeBlockDragOver',
        'block:reorder:dropped':    'onBlockDropped',
        'block:create:new':         'onNewBlockCreated'
      },
  
      initialize: function(options) {
        SirTrevor.log("Init SirTrevor.Editor");
  
        this.blockTypes = {};
        this.blockCounts = {}; // Cached block type counts
        this.blocks = []; // Block references
        this.errors = [];
        this.options = _.extend({}, SirTrevor.DEFAULTS, options || {});
        this.ID = _.uniqueId('st-editor-');
  
        if (!this._ensureAndSetElements()) { return false; }
  
        if(!_.isUndefined(this.options.onEditorRender) && _.isFunction(this.options.onEditorRender)) {
          this.onEditorRender = this.options.onEditorRender;
        }
  
        this._setRequired();
        this._setBlocksTypes();
        this._bindFunctions();
  
        this.store("create");
        this.build();
  
        SirTrevor.instances.push(this);
        SirTrevor.bindFormSubmit(this.$form);
      },
  
      /*
        Build the Editor instance.
        Check to see if we've been passed JSON already, and if not try and create a default block.
        If we have JSON then we need to build all of our blocks from this.
      */
      build: function() {
        this.$el.hide();
  
        this.block_controls = new SirTrevor.BlockControls(this.blockTypes, this.ID);
        this.fl_block_controls = new SirTrevor.FloatingBlockControls(this.$wrapper, this.ID);
        this.formatBar = new SirTrevor.FormatBar(this.options.formatBar);
  
        this.listenTo(this.block_controls, 'createBlock', this.createBlock);
        this.listenTo(this.fl_block_controls, 'showBlockControls', this.showBlockControls);
  
        this._setEvents();
  
        SirTrevor.EventBus.on(this.ID + ":blocks:change_position", this.changeBlockPosition);
        SirTrevor.EventBus.on("formatter:positon", this.formatBar.renderBySelection);
        SirTrevor.EventBus.on("formatter:hide", this.formatBar.hide);
  
        this.$wrapper.prepend(this.fl_block_controls.render().$el);
        $(document.body).append(this.formatBar.render().$el);
        this.$outer.append(this.block_controls.render().$el);
  
        $(window).bind('click', this.hideAllTheThings);
  
        var store = this.store("read");
  
        if (store.data.length > 0) {
          _.each(store.data, function(block){
            SirTrevor.log('Creating: ' + block.type);
            this.createBlock(block.type, block.data);
          }, this);
        } else if (this.options.defaultType !== false) {
          this.createBlock(this.options.defaultType, {});
        }
  
        this.$wrapper.addClass('st-ready');
  
        if(!_.isUndefined(this.onEditorRender)) {
          this.onEditorRender();
        }
      },
  
      destroy: function() {
        // Destroy the rendered sub views
        this.formatBar.destroy();
        this.fl_block_controls.destroy();
        this.block_controls.destroy();
  
        // Destroy all blocks
        _.each(this.blocks, function(block) {
          this.removeBlock(block.blockID);
        }, this);
  
        // Stop listening to events
        this.stopListening();
  
        // Cleanup element
        var el = this.$el.detach();
  
        // Remove instance
        SirTrevor.instances = _.reject(SirTrevor.instances, _.bind(function(instance) {
          return instance.ID == this.ID;
        }, this));
  
        // Clear the store
        this.store("reset");
  
        this.$outer.replaceWith(el);
      },
  
      reinitialize: function(options) {
        this.destroy();
        this.initialize(options || this.options);
      },
  
      _setEvents: function() {
        _.each(this.events, function(callback, type) {
          SirTrevor.EventBus.on(type, this[callback], this);
        }, this);
      },
  
      hideAllTheThings: function(e) {
        this.block_controls.hide();
        this.formatBar.hide();
  
        if (!_.isUndefined(this.block_controls.current_container)) {
          this.block_controls.current_container.removeClass("with-st-controls");
        }
      },
  
      showBlockControls: function(container) {
        if (!_.isUndefined(this.block_controls.current_container)) {
          this.block_controls.current_container.removeClass("with-st-controls");
        }
  
        this.block_controls.show();
  
        container.append(this.block_controls.$el.detach());
        container.addClass('with-st-controls');
  
        this.block_controls.current_container = container;
      },
  
      store: function(method, options){
        return SirTrevor.editorStore(this, method, options || {});
      },
  
      /*
        Create an instance of a block from an available type.
        We have to check the number of blocks we're allowed to create before adding one and handle fails accordingly.
        A block will have a reference to an Editor instance & the parent BlockType.
        We also have to remember to store static counts for how many blocks we have, and keep a nice array of all the blocks available.
      */
      createBlock: function(type, data, render_at) {
        type = _.classify(type);
  
        if(this._blockLimitReached()) {
          SirTrevor.log("Cannot add any more blocks. Limit reached.");
          return false;
        }
  
        if (!this._isBlockTypeAvailable(type)) {
          SirTrevor.log("Block type not available " + type);
          return false;
        }
  
        // Can we have another one of these blocks?
        if (!this._canAddBlockType(type)) {
          SirTrevor.log("Block Limit reached for type " + type);
          return false;
        }
  
        var block = new SirTrevor.Blocks[type](data, this.ID);
  
        this._renderInPosition(block.render().$el);
  
        this.listenTo(block, 'removeBlock', this.removeBlock);
  
        this.blocks.push(block);
        this._incrementBlockTypeCount(type);
  
        block.focus();
  
        SirTrevor.EventBus.trigger(data ? "block:create:existing" : "block:create:new", block);
        SirTrevor.log("Block created of type " + type);
        block.trigger("onRender");
  
        this.$wrapper.toggleClass('st--block-limit-reached', this._blockLimitReached());
        this.triggerBlockCountUpdate();
      },
  
      onNewBlockCreated: function(block) {
        this.hideBlockControls();
        this.scrollTo(block.$el);
      },
  
      scrollTo: function(element) {
        $('html, body').animate({ scrollTop: element.position().top }, 300, "linear");
      },
  
      blockFocus: function(block) {
        this.block_controls.current_container = null;
      },
  
      hideBlockControls: function() {
        if (!_.isUndefined(this.block_controls.current_container)) {
          this.block_controls.current_container.removeClass("with-st-controls");
        }
  
        this.block_controls.hide();
      },
  
      removeBlockDragOver: function() {
        this.$outer.find('.st-drag-over').removeClass('st-drag-over');
      },
  
      triggerBlockCountUpdate: function() {
        SirTrevor.EventBus.trigger(this.ID + ":blocks:count_update", this.blocks.length);
      },
  
      changeBlockPosition: function($block, selectedPosition) {
        selectedPosition = selectedPosition - 1;
  
        var blockPosition = this.getBlockPosition($block);
        var $blockBy = this.$wrapper.find('.st-block').eq(selectedPosition);
        var blockByPosition = this.getBlockPosition($blockBy);
  
        var where = (blockPosition > selectedPosition) ? "Before" : "After";
  
        if($blockBy && $blockBy.attr('id') !== $block.attr('id')) {
          this.hideAllTheThings();
          $block["insert" + where]($blockBy);
          this.scrollTo($block);
        }
      },
  
      onBlockDropped: function(block_id) {
        this.hideAllTheThings();
        var block = this.findBlockById(block_id);
        if (!_.isUndefined(block) &&
            !_.isEmpty(block.getData()) &&
            block.drop_options.re_render_on_reorder) {
          block.beforeLoadingData();
        }
      },
  
      onBlockDragStart: function() {
        this.hideBlockControls();
        this.$wrapper.addClass("st-outer--is-reordering");
      },
  
      onBlockDragEnd: function() {
        this.removeBlockDragOver();
        this.$wrapper.removeClass("st-outer--is-reordering");
      },
  
      _renderInPosition: function(block) {
        if (this.block_controls.current_container) {
          this.block_controls.current_container.after(block);
        } else {
          this.$wrapper.append(block);
        }
      },
  
      _incrementBlockTypeCount: function(type) {
        this.blockCounts[type] = (_.isUndefined(this.blockCounts[type])) ? 1: this.blockCounts[type] + 1;
      },
  
      _getBlockTypeCount: function(type) {
        return (_.isUndefined(this.blockCounts[type])) ? 0 : this.blockCounts[type];
      },
  
      _canAddBlockType: function(type) {
        var block_type_limit = this._getBlockTypeLimit(type);
  
        return !(block_type_limit !== 0 && this._getBlockTypeCount(type) >= block_type_limit);
      },
  
      _blockLimitReached: function() {
        return (this.options.blockLimit !== 0 && this.blocks.length >= this.options.blockLimit);
      },
  
      removeBlock: function(block_id) {
        var block = this.findBlockById(block_id),
            type = _.classify(block.type),
            controls = block.$el.find('.st-block-controls');
  
        if (controls.length) {
          this.block_controls.hide();
          this.$wrapper.prepend(controls);
        }
  
        this.blockCounts[type] = this.blockCounts[type] - 1;
        this.blocks = _.reject(this.blocks, function(item){ return (item.blockID == block.blockID); });
        this.stopListening(block);
  
        block.remove();
  
        SirTrevor.EventBus.trigger("block:remove");
        this.triggerBlockCountUpdate();
  
        this.$wrapper.toggleClass('st--block-limit-reached', this._blockLimitReached());
      },
  
      performValidations : function(block, should_validate) {
        var errors = 0;
  
        if (!SirTrevor.SKIP_VALIDATION && should_validate) {
          if(!block.valid()){
            this.errors.push({ text: _.result(block, 'validationFailMsg') });
            SirTrevor.log("Block " + block.blockID + " failed validation");
            ++errors;
          }
        }
  
        return errors;
      },
  
      saveBlockStateToStore: function(block) {
        var store = block.saveAndReturnData();
        if(store && !_.isEmpty(store.data)) {
          SirTrevor.log("Adding data for block " + block.blockID + " to block store");
          this.store("add", { data: store });
        }
      },
  
      /*
        Handle a form submission of this Editor instance.
        Validate all of our blocks, and serialise all data onto the JSON objects
      */
      onFormSubmit: function(should_validate) {
        // if undefined or null or anything other than false - treat as true
        should_validate = (should_validate === false) ? false : true;
  
        SirTrevor.log("Handling form submission for Editor " + this.ID);
  
        this.removeErrors();
        this.store("reset");
  
        this.validateBlocks(should_validate);
        this.validateBlockTypesExist(should_validate);
  
        this.renderErrors();
        this.store("save");
  
        return this.errors.length;
      },
  
      validateBlocks: function(should_validate) {
        if (!this.required && (SirTrevor.SKIP_VALIDATION && !should_validate)) {
          return false;
        }
  
        var blockIterator = function(block,index) {
          var _block = _.find(this.blocks, function(b) {
            return (b.blockID == $(block).attr('id')); });
  
          if (_.isUndefined(_block)) { return false; }
  
          // Find our block
          this.performValidations(_block, should_validate);
          this.saveBlockStateToStore(_block);
        };
  
        _.each(this.$wrapper.find('.st-block'), blockIterator, this);
      },
  
      validateBlockTypesExist: function(should_validate) {
        if (!this.required && (SirTrevor.SKIP_VALIDATION && !should_validate)) {
          return false;
        }
  
        var blockTypeIterator = function(type, index) {
          if (!this._isBlockTypeAvailable(type)) { return; }
  
          if (this._getBlockTypeCount(type) === 0) {
            SirTrevor.log("Failed validation on required block type " + type);
            this.errors.push({ text: i18n.t("errors:type_missing", { type: type }) });
          } else {
            var blocks = _.filter(this.getBlocksByType(type), function(b) {
              return !b.isEmpty();
            });
  
            if (blocks.length > 0) { return false; }
  
            this.errors.push({ text: i18n.t("errors:required_type_empty", { type: type }) });
            SirTrevor.log("A required block type " + type + " is empty");
          }
        };
  
        if (_.isArray(this.required)) {
          _.each(this.required, blockTypeIterator, this);
        }
      },
  
      renderErrors: function() {
        if (this.errors.length === 0) { return false; }
  
        if (_.isUndefined(this.$errors)) {
          this.$errors = this._errorsContainer();
        }
  
        var str = "<ul>";
  
        _.each(this.errors, function(error) {
          str += '<li class="st-errors__msg">'+ error.text +'</li>';
        });
  
        str += "</ul>";
  
        this.$errors.append(str);
        this.$errors.show();
      },
  
      _errorsContainer: function() {
        if (_.isUndefined(this.options.errorsContainer)) {
          var $container = $("<div>", {
            'class': 'st-errors',
            html: "<p>" + i18n.t("errors:title") + " </p>"
          });
  
          this.$outer.prepend($container);
          return $container;
        }
  
        return $element(this.options.errorsContainer);
      },
  
      removeErrors: function() {
        if (this.errors.length === 0) { return false; }
  
        this.$errors.hide().find('ul').html('');
  
        this.errors = [];
      },
  
      findBlockById: function(block_id) {
        return _.find(this.blocks, function(b){ return b.blockID == block_id; });
      },
  
      getBlocksByType: function(block_type) {
        return _.filter(this.blocks, function(b){ return _.classify(b.type) == block_type; });
      },
  
      getBlocksByIDs: function(block_ids) {
        return _.filter(this.blocks, function(b){ return _.contains(block_ids, b.blockID); });
      },
  
      getBlockPosition: function($block) {
        return this.$wrapper.find('.st-block').index($block);
      },
  
      /*
        Get Block Type Limit
        --
        returns the limit for this block, which can be set on a per Editor instance, or on a global blockType scope.
      */
      _getBlockTypeLimit: function(t) {
        if (!this._isBlockTypeAvailable(t)) { return 0; }
  
        return parseInt((_.isUndefined(this.options.blockTypeLimits[t])) ? 0 : this.options.blockTypeLimits[t], 10);
      },
  
      /*
        Availability helper methods
        --
        Checks if the object exists within the instance of the Editor.
      */
      _isBlockTypeAvailable: function(t) {
        return !_.isUndefined(this.blockTypes[t]);
      },
  
      _ensureAndSetElements: function() {
        if(_.isUndefined(this.options.el) || _.isEmpty(this.options.el)) {
          SirTrevor.log("You must provide an el");
          return false;
        }
  
        this.$el = this.options.el;
        this.el = this.options.el[0];
        this.$form = this.$el.parents('form');
  
        var $outer = $("<div>").attr({ 'id': this.ID, 'class': 'st-outer', 'dropzone': 'copy link move' });
        var $wrapper = $("<div>").attr({ 'class': 'st-blocks' });
  
        // Wrap our element in lots of containers *eww*
        this.$el.wrap($outer).wrap($wrapper);
  
        this.$outer = this.$form.find('#' + this.ID);
        this.$wrapper = this.$outer.find('.st-blocks');
  
        return true;
      },
  
      /*
        Set our blockTypes
        These will either be set on a per Editor instance, or set on a global scope.
      */
      _setBlocksTypes: function() {
        this.blockTypes = _.flattern((_.isUndefined(this.options.blockTypes)) ? SirTrevor.Blocks : this.options.blockTypes);
      },
  
      /* Get our required blocks (if any) */
      _setRequired: function() {
        if (_.isArray(this.options.required) && !_.isEmpty(this.options.required)) {
          this.required = this.options.required;
        } else {
          this.required = false;
        }
      }
    });
  
    return SirTrevorEditor;
  
  })();
  

  /* We need a form handler here to handle all the form submits */
  SirTrevor.setDefaults = function(options) {
    SirTrevor.DEFAULTS = _.extend(SirTrevor.DEFAULTS, options || {});
  };

  SirTrevor.bindFormSubmit = function(form) {
    if (!formBound) {
      SirTrevor.submittable();
      form.bind('submit', this.onFormSubmit);
      formBound = true;
    }
  };

  SirTrevor.onBeforeSubmit = function(should_validate) {
    // Loop through all of our instances and do our form submits on them
    var errors = 0;
    _.each(SirTrevor.instances, function(inst, i) {
      errors += inst.onFormSubmit(should_validate);
    });
    SirTrevor.log("Total errors: " + errors);

    return errors;
  };

  SirTrevor.onFormSubmit = function(ev) {
    var errors = SirTrevor.onBeforeSubmit();

    if(errors > 0) {
      SirTrevor.EventBus.trigger("onError");
      ev.preventDefault();
    }
  };

  SirTrevor.getInstance = function(identifier) {
    if (_.isUndefined(identifier)) {
      return this.instances[0];
    }

    if (_.isString(identifier)) {
      return _.find(this.instances,
        function(editor){ return editor.ID === identifier; });
    }

    return this.instances[identifier];
  };

  SirTrevor.setBlockOptions = function(type, options) {
    var block = SirTrevor.Blocks[type];

    if (_.isUndefined(block)) {
      return;
    }

    _.extend(block.prototype, options || {});
  };

  SirTrevor.runOnAllInstances = function(method) {
    if (_.has(SirTrevor.Editor.prototype, method)) {
      // augment the arguments pseudo array and pass on to invoke()
      // this allows us to pass arguments on to the target methods
      [].unshift.call(arguments, SirTrevor.instances);
      _.invoke.apply(_, arguments);
    } else {
      SirTrevor.log("method doesn't exist");
    }
  };

}(jQuery, _));


/*!
 * Nestable jQuery Plugin - Copyright (c) 2012 David Bushell - http://dbushell.com/
 * Dual-licensed under the BSD or MIT licenses
 */

;(function($, window, document, undefined)
{
    var hasTouch = 'ontouchstart' in window;
    var nestableCopy;

    /**
     * Detect CSS pointer-events property
     * events are normally disabled on the dragging element to avoid conflicts
     * https://github.com/ausi/Feature-detection-technique-for-pointer-events/blob/master/modernizr-pointerevents.js
     */
    var hasPointerEvents = (function()
    {
        var el    = document.createElement('div'),
            docEl = document.documentElement;
        if (!('pointerEvents' in el.style)) {
            return false;
        }
        el.style.pointerEvents = 'auto';
        el.style.pointerEvents = 'x';
        docEl.appendChild(el);
        var supports = window.getComputedStyle && window.getComputedStyle(el, '').pointerEvents === 'auto';
        docEl.removeChild(el);
        return !!supports;
    })();

    var eStart  = hasTouch ? 'touchstart'  : 'mousedown',
         eMove   = hasTouch ? 'touchmove'   : 'mousemove',
         eEnd    = hasTouch ? 'touchend'    : 'mouseup',
         eCancel = hasTouch ? 'touchcancel' : 'mouseup';
          
    var defaults = {
        listNodeName    : 'ol',
        itemNodeName    : 'li',
        rootClass       : 'dd',
        listClass       : 'dd-list',
        itemClass       : 'dd-item',
        dragClass       : 'dd-dragel',
        handleClass     : 'dd-handle',
        collapsedClass  : 'dd-collapsed',
        placeClass      : 'dd-placeholder',
        noDragClass     : 'dd-nodrag',
        noChildrenClass : 'dd-nochildren',
        emptyClass      : 'dd-empty',
        expandBtnHTML   : '<button data-action="expand" type="button">Expand</button>',
        collapseBtnHTML : '<button data-action="collapse" type="button">Collapse</button>',
        group           : 0,
        maxDepth        : 5,
        threshold       : 20,
        reject          : [],
        //method for call when an item has been successfully dropped
        //method has 1 argument in which sends an object containing all
        //necessary details
        dropCallback    : null,
      // When a node is dragged it is moved to its new location.
      // You can set the next option to true to create a copy of the node  that is dragged.
      cloneNodeOnDrag   : false,
      // When the node is dragged and released outside its list delete it.
      dragOutsideToDelete : false
    };

    function Plugin(element, options)
    {
        this.w = $(document);
        this.el = $(element);
        this.options = $.extend({}, defaults, options);
        this.init();
    }

    Plugin.prototype = {

        init: function()
        {
            var list = this;

            list.reset();

            list.el.data('nestable-group', this.options.group);

            list.placeEl = $('<div class="' + list.options.placeClass + '"/>');

            $.each(this.el.find(list.options.itemNodeName), function(k, el) {
                list.setParent($(el));
            });

            list.el.on('click', 'button', function(e)
            {
                if (list.dragEl || (!hasTouch && e.button !== 0)) {
                    return;
                }
                var target = $(e.currentTarget),
                    action = target.data('action'),
                    item   = target.parent(list.options.itemNodeName);
                if (action === 'collapse') {
                    list.collapseItem(item);
                }
                if (action === 'expand') {
                    list.expandItem(item);
                }
            });

            var onStartEvent = function(e)
            {
                var handle = $(e.target);

                list.nestableCopy = handle.closest('.'+list.options.rootClass).clone(true);

                if (!handle.hasClass(list.options.handleClass)) {
                    if (handle.closest('.' + list.options.noDragClass).length) {
                        return;
                    }
                    handle = handle.closest('.' + list.options.handleClass);
                }
                if (!handle.length || list.dragEl || (!hasTouch && e.which !== 1) || (hasTouch && e.touches.length !== 1)) {
                    return;
                }
                e.preventDefault();
                list.dragStart(hasTouch ? e.touches[0] : e);
            };

            var onMoveEvent = function(e)
            {
                if (list.dragEl) {
                    e.preventDefault();
                    list.dragMove(hasTouch ? e.touches[0] : e);
                }
            };

            var onEndEvent = function(e)
            {
                if (list.dragEl) {
                    e.preventDefault();
                    list.dragStop(hasTouch ? e.touches[0] : e);
                }
            };

            if (hasTouch) {
                list.el[0].addEventListener(eStart, onStartEvent, false);
                window.addEventListener(eMove, onMoveEvent, false);
                window.addEventListener(eEnd, onEndEvent, false);
                window.addEventListener(eCancel, onEndEvent, false);
            } else {
                list.el.on(eStart, onStartEvent);
                list.w.on(eMove, onMoveEvent);
                list.w.on(eEnd, onEndEvent);
            }

            var destroyNestable = function()
            {
                if (hasTouch) {
                    list.el[0].removeEventListener(eStart, onStartEvent, false);
                    window.removeEventListener(eMove, onMoveEvent, false);
                    window.removeEventListener(eEnd, onEndEvent, false);
                    window.removeEventListener(eCancel, onEndEvent, false);
                } else {
                    list.el.off(eStart, onStartEvent);
                    list.w.off(eMove, onMoveEvent);
                    list.w.off(eEnd, onEndEvent);
                }

                list.el.off('click');
                list.el.unbind('destroy-nestable');

                list.el.data("nestable", null);

                var buttons = list.el[0].getElementsByTagName('button');

                $(buttons).remove();
            };

            list.el.bind('destroy-nestable', destroyNestable);
        },

        destroy: function ()
        {
            this.expandAll();
            this.el.trigger('destroy-nestable');
        },

        serialize: function()
        {
            var data,
                depth = 0,
                list  = this;
                step  = function(level, depth)
                {
                    var array = [ ],
                        items = level.children(list.options.itemNodeName);
                    items.each(function()
                    {
                        var li   = $(this),
                            item = $.extend({}, li.data()),
                            sub  = li.children(list.options.listNodeName);
                        if (sub.length) {
                            item.children = step(sub, depth + 1);
                        }
                        array.push(item);
                    });
                    return array;
                };
            var el;

            if (list.el.is(list.options.listNodeName)) {
                el = list.el;
            } else {
                el = list.el.find(list.options.listNodeName).first();
            }
            data = step(el, depth);
            return data;
        },

        reset: function()
        {
            this.mouse = {
                offsetX   : 0,
                offsetY   : 0,
                startX    : 0,
                startY    : 0,
                lastX     : 0,
                lastY     : 0,
                nowX      : 0,
                nowY      : 0,
                distX     : 0,
                distY     : 0,
                dirAx     : 0,
                dirX      : 0,
                dirY      : 0,
                lastDirX  : 0,
                lastDirY  : 0,
                distAxX   : 0,
                distAxY   : 0
            };
            this.moving     = false;
            this.dragEl     = null;
            this.dragRootEl = null;
            this.dragDepth  = 0;
            this.dragItem   = null;
            this.hasNewRoot = false;
            this.pointEl    = null;
            this.sourceRoot = null;
            this.isOutsideRoot = false;
        },

        expandItem: function(li)
        {
            li.removeClass(this.options.collapsedClass);
            li.children('[data-action="expand"]').hide();
            li.children('[data-action="collapse"]').show();
            li.children(this.options.listNodeName).show();
            this.el.trigger('expand', [li]);
            li.trigger('expand');
        },

        collapseItem: function(li)
        {
            var lists = li.children(this.options.listNodeName);
            if (lists.length) {
                li.addClass(this.options.collapsedClass);
                li.children('[data-action="collapse"]').hide();
                li.children('[data-action="expand"]').show();
                li.children(this.options.listNodeName).hide();
            }
            this.el.trigger('collapse', [li]);
            li.trigger('collapse');
        },

        expandAll: function()
        {
            var list = this;
            list.el.find(list.options.itemNodeName).each(function() {
                list.expandItem($(this));
            });
        },

        collapseAll: function()
        {
            var list = this;
            list.el.find(list.options.itemNodeName).each(function() {
                list.collapseItem($(this));
            });
        },

        setParent: function(li)
        {
            if (li.children(this.options.listNodeName).length) {
                li.prepend($(this.options.expandBtnHTML));
                li.prepend($(this.options.collapseBtnHTML));
            }
            if( (' ' + li[0].className + ' ').indexOf(' ' + defaults.collapsedClass + ' ') > -1 )
            {
                li.children('[data-action="collapse"]').hide();
            } else {
                li.children('[data-action="expand"]').hide();
            }
        },

        unsetParent: function(li)
        {
            li.removeClass(this.options.collapsedClass);
            li.children('[data-action]').remove();
            li.children(this.options.listNodeName).remove();
        },

        dragStart: function(e)
        {
            var mouse    = this.mouse,
                target   = $(e.target),
                dragItem = target.closest('.' + this.options.handleClass).closest(this.options.itemNodeName);

            this.sourceRoot = target.closest('.' + this.options.rootClass);

            this.dragItem = dragItem;

            this.placeEl.css('height', dragItem.height());

            mouse.offsetX = e.offsetX !== undefined ? e.offsetX : e.pageX - target.offset().left;
            mouse.offsetY = e.offsetY !== undefined ? e.offsetY : e.pageY - target.offset().top;
            mouse.startX = mouse.lastX = e.pageX;
            mouse.startY = mouse.lastY = e.pageY;

            this.dragRootEl = this.el;

            this.dragEl = $(document.createElement(this.options.listNodeName)).addClass(this.options.listClass + ' ' + this.options.dragClass);
            this.dragEl.css('width', dragItem.width());

            // fix for zepto.js
            //dragItem.after(this.placeEl).detach().appendTo(this.dragEl);
            if(this.options.cloneNodeOnDrag) {
                dragItem.after(dragItem.clone());
            } else {
                dragItem.after(this.placeEl);
            }
            dragItem[0].parentNode.removeChild(dragItem[0]);
            dragItem.appendTo(this.dragEl);

            $(document.body).append(this.dragEl);
            this.dragEl.css({
                'left' : e.pageX - mouse.offsetX,
                'top'  : e.pageY - mouse.offsetY
            });
            // total depth of dragging item
            var i, depth,
                items = this.dragEl.find(this.options.itemNodeName);
            for (i = 0; i < items.length; i++) {
                depth = $(items[i]).parents(this.options.listNodeName).length;
                if (depth > this.dragDepth) {
                    this.dragDepth = depth;
                }
            }
        },

        dragStop: function(e)
        {
            // fix for zepto.js
            //this.placeEl.replaceWith(this.dragEl.children(this.options.itemNodeName + ':first').detach());
            var el = this.dragEl.children(this.options.itemNodeName).first();
            el[0].parentNode.removeChild(el[0]);

            if(this.isOutsideRoot && this.options.dragOutsideToDelete)
                {
                var parent = this.placeEl.parent();
                this.placeEl.remove();
                if (!parent.children().length) {
                    this.unsetParent(parent.parent());
                }
                // If all nodes where deleted, create a placeholder element.
                if (!this.dragRootEl.find(this.options.itemNodeName).length)
                     {
                    this.dragRootEl.append('<div class="' + this.options.emptyClass + '"/>');
                }
            } 
                else 
                {
                this.placeEl.replaceWith(el);
            }

            if (!this.moving)
            {
                $(this.dragItem).trigger('click');
            }

            var i;
            var isRejected = false;
            for (i in this.options.reject)
            {
                var reject = this.options.reject[i];
                if (reject.rule.apply(this.dragRootEl))
                {
                    var nestableDragEl = el.clone(true);
                    this.dragRootEl.html(this.nestableCopy.children().clone(true));
                    if (reject.action) {
                        reject.action.apply(this.dragRootEl, [nestableDragEl]);
                    }

                    isRejected = true;
                    break;
                }
            }

            if (!isRejected)
            {
                this.dragEl.remove();
                this.el.trigger('change');

                //Let's find out new parent id
                var parentItem = el.parent().parent();
                var parentId = null;
                if(parentItem !== null && !parentItem.is('.' + this.options.rootClass))
                    parentId = parentItem.data('id');

                if($.isFunction(this.options.dropCallback))
                {
                    var details = {
                        sourceId   : el.data('id'),
                        destId     : parentId,
                        sourceEl   : el,
                        destParent : parentItem,
                        destRoot   : el.closest('.' + this.options.rootClass),
                        sourceRoot : this.sourceRoot
                  };
                  this.options.dropCallback.call(this, details);
                }

                if (this.hasNewRoot) {
                    this.dragRootEl.trigger('change');
                }

                this.reset();
            }
        },

        dragMove: function(e)
        {
            var list, parent, prev, next, depth,
                opt   = this.options,
                mouse = this.mouse;

            this.dragEl.css({
                'left' : e.pageX - mouse.offsetX,
                'top'  : e.pageY - mouse.offsetY
            });

            // mouse position last events
            mouse.lastX = mouse.nowX;
            mouse.lastY = mouse.nowY;
            // mouse position this events
            mouse.nowX  = e.pageX;
            mouse.nowY  = e.pageY;
            // distance mouse moved between events
            mouse.distX = mouse.nowX - mouse.lastX;
            mouse.distY = mouse.nowY - mouse.lastY;
            // direction mouse was moving
            mouse.lastDirX = mouse.dirX;
            mouse.lastDirY = mouse.dirY;
            // direction mouse is now moving (on both axis)
            mouse.dirX = mouse.distX === 0 ? 0 : mouse.distX > 0 ? 1 : -1;
            mouse.dirY = mouse.distY === 0 ? 0 : mouse.distY > 0 ? 1 : -1;
            // axis mouse is now moving on
            var newAx   = Math.abs(mouse.distX) > Math.abs(mouse.distY) ? 1 : 0;

            // do nothing on first move
            if (!this.moving) {
                mouse.dirAx  = newAx;
                this.moving = true;
                return;
            }

            // calc distance moved on this axis (and direction)
            if (mouse.dirAx !== newAx) {
                mouse.distAxX = 0;
                mouse.distAxY = 0;
            } else {
                mouse.distAxX += Math.abs(mouse.distX);
                if (mouse.dirX !== 0 && mouse.dirX !== mouse.lastDirX) {
                    mouse.distAxX = 0;
                }
                mouse.distAxY += Math.abs(mouse.distY);
                if (mouse.dirY !== 0 && mouse.dirY !== mouse.lastDirY) {
                    mouse.distAxY = 0;
                }
            }
            mouse.dirAx = newAx;

            /**
             * move horizontal
             */
            if (mouse.dirAx && mouse.distAxX >= opt.threshold) {
                // reset move distance on x-axis for new phase
                mouse.distAxX = 0;
                prev = this.placeEl.prev(opt.itemNodeName);
                // increase horizontal level if previous sibling exists and is not collapsed
                if (mouse.distX > 0 && prev.length && !prev.hasClass(opt.collapsedClass) && !prev.hasClass(opt.noChildrenClass)) {
                    // cannot increase level when item above is collapsed
                    list = prev.find(opt.listNodeName).last();
                    // check if depth limit has reached
                    depth = this.placeEl.parents(opt.listNodeName).length;
                    if (depth + this.dragDepth <= opt.maxDepth) {
                        // create new sub-level if one doesn't exist
                        if (!list.length) {
                            list = $('<' + opt.listNodeName + '/>').addClass(opt.listClass);
                            list.append(this.placeEl);
                            prev.append(list);
                            this.setParent(prev);
                        } else {
                            // else append to next level up
                            list = prev.children(opt.listNodeName).last();
                            list.append(this.placeEl);
                        }
                    }
                }
                // decrease horizontal level
                if (mouse.distX < 0) {
                    // we can't decrease a level if an item preceeds the current one
                    next = this.placeEl.next(opt.itemNodeName);
                    if (!next.length) {
                        parent = this.placeEl.parent();
                        this.placeEl.closest(opt.itemNodeName).after(this.placeEl);
                        if (!parent.children().length) {
                            this.unsetParent(parent.parent());
                        }
                    }
                }
            }

            var isEmpty = false;

            // find list item under cursor
            if (!hasPointerEvents) {
                this.dragEl[0].style.visibility = 'hidden';
            }
                
            this.pointEl = $(document.elementFromPoint(e.pageX - document.documentElement.scrollLeft, e.pageY - (window.pageYOffset || document.documentElement.scrollTop)));

            // Check if the node is dragged outside of its list.
            if(this.dragRootEl.has(this.pointEl).length) {
                this.isOutsideRoot = false;
                this.dragEl[0].style.opacity = 1;
            } else {
                this.isOutsideRoot = true;
                this.dragEl[0].style.opacity = 0.5;
            }

            // find parent list of item under cursor
            var pointElRoot = this.pointEl.closest('.' + opt.rootClass),
                isNewRoot   = this.dragRootEl.data('nestable-id') !== pointElRoot.data('nestable-id');

            this.isOutsideRoot = !pointElRoot.length;

            if (!hasPointerEvents) {
                this.dragEl[0].style.visibility = 'visible';
            }
            if (this.pointEl.hasClass(opt.handleClass)) {
                this.pointEl = this.pointEl.closest( opt.itemNodeName );
            }

            if (opt.maxDepth == 1 && !this.pointEl.hasClass(opt.itemClass)) {
                this.pointEl = this.pointEl.closest("." + opt.itemClass);
            }

            if (this.pointEl.hasClass(opt.emptyClass)) {
                isEmpty = true;
            }
            else if (!this.pointEl.length || !this.pointEl.hasClass(opt.itemClass)) {
                return;
            }

            /**
             * move vertical
             */
            if (!mouse.dirAx || isNewRoot || isEmpty) {
                // check if groups match if dragging over new root
                if (isNewRoot && opt.group !== pointElRoot.data('nestable-group')) {
                    return;
                }
                // check depth limit
                depth = this.dragDepth - 1 + this.pointEl.parents(opt.listNodeName).length;
                if (depth > opt.maxDepth) {
                    return;
                }
                var before = e.pageY < (this.pointEl.offset().top + this.pointEl.height() / 2);
                    parent = this.placeEl.parent();
                // if empty create new list to replace empty placeholder
                if (isEmpty) {
                    list = $(document.createElement(opt.listNodeName)).addClass(opt.listClass);
                    list.append(this.placeEl);
                    this.pointEl.replaceWith(list);
                }
                else if (before) {
                    this.pointEl.before(this.placeEl);
                }
                else {
                    this.pointEl.after(this.placeEl);
                }
                if (!parent.children().length) {
                    this.unsetParent(parent.parent());
                }
                if (!this.dragRootEl.find(opt.itemNodeName).length) {
                    this.dragRootEl.append('<div class="' + opt.emptyClass + '"/>');
                }
                // parent root list has changed
                this.dragRootEl = pointElRoot;
                if (isNewRoot) {
                    this.hasNewRoot = this.el[0] !== this.dragRootEl[0];
                }
            }
        }

    };

    $.fn.nestable = function(params)
    {
        var lists  = this,
            retval = this;

        var generateUid = function (separator) {
            var delim = separator || "-";

            function S4() {
                return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
            }

            return (S4() + S4() + delim + S4() + delim + S4() + delim + S4() + delim + S4() + S4() + S4());
        };

        lists.each(function()
        {
            var plugin = $(this).data("nestable");

            if (!plugin) {
                $(this).data("nestable", new Plugin(this, params));
                $(this).data("nestable-id", generateUid());
            } else {
                if (typeof params === 'string' && typeof plugin[params] === 'function') {
                    retval = plugin[params]();
                }
            }
        });

        return retval || lists;
    };

})(window.jQuery || window.Zepto, window, document);
Spotlight = function() {
  var buffer = new Array;
  return {
    onLoad: function(func) {
      buffer.push(func);
    },

    activate: function() {
      for(var i = 0; i < buffer.length; i++) {
        buffer[i].call();
      }
    }
  }
}();

if (typeof Turbolinks !== "undefined") {
  $(document).on('page:load', function() {
    Spotlight.activate();
  });
}
$(document).ready(function() {
  Spotlight.activate();
});


Spotlight.onLoad(function(){
  $.each($('.social-share-button a'), function() {
    $(this).append($(this).attr('title'));
  });
});

/* ========================================================================
 * Bootstrap: tooltip.js v3.1.1
 * http://getbootstrap.com/javascript/#tooltip
 * Inspired by the original jQuery.tipsy by Jason Frame
 * ========================================================================
 * Copyright 2011-2014 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * ======================================================================== */


+function ($) {
  'use strict';

  // TOOLTIP PUBLIC CLASS DEFINITION
  // ===============================

  var Tooltip = function (element, options) {
    this.type       =
    this.options    =
    this.enabled    =
    this.timeout    =
    this.hoverState =
    this.$element   = null

    this.init('tooltip', element, options)
  }

  Tooltip.DEFAULTS = {
    animation: true,
    placement: 'top',
    selector: false,
    template: '<div class="tooltip" role="tooltip"><div class="tooltip-arrow"></div><div class="tooltip-inner"></div></div>',
    trigger: 'hover focus',
    title: '',
    delay: 0,
    html: false,
    container: false,
    viewport: {
      selector: 'body',
      padding: 0
    }
  }

  Tooltip.prototype.init = function (type, element, options) {
    this.enabled   = true
    this.type      = type
    this.$element  = $(element)
    this.options   = this.getOptions(options)
    this.$viewport = this.options.viewport && $(this.options.viewport.selector || this.options.viewport)

    var triggers = this.options.trigger.split(' ')

    for (var i = triggers.length; i--;) {
      var trigger = triggers[i]

      if (trigger == 'click') {
        this.$element.on('click.' + this.type, this.options.selector, $.proxy(this.toggle, this))
      } else if (trigger != 'manual') {
        var eventIn  = trigger == 'hover' ? 'mouseenter' : 'focusin'
        var eventOut = trigger == 'hover' ? 'mouseleave' : 'focusout'

        this.$element.on(eventIn  + '.' + this.type, this.options.selector, $.proxy(this.enter, this))
        this.$element.on(eventOut + '.' + this.type, this.options.selector, $.proxy(this.leave, this))
      }
    }

    this.options.selector ?
      (this._options = $.extend({}, this.options, { trigger: 'manual', selector: '' })) :
      this.fixTitle()
  }

  Tooltip.prototype.getDefaults = function () {
    return Tooltip.DEFAULTS
  }

  Tooltip.prototype.getOptions = function (options) {
    options = $.extend({}, this.getDefaults(), this.$element.data(), options)

    if (options.delay && typeof options.delay == 'number') {
      options.delay = {
        show: options.delay,
        hide: options.delay
      }
    }

    return options
  }

  Tooltip.prototype.getDelegateOptions = function () {
    var options  = {}
    var defaults = this.getDefaults()

    this._options && $.each(this._options, function (key, value) {
      if (defaults[key] != value) options[key] = value
    })

    return options
  }

  Tooltip.prototype.enter = function (obj) {
    var self = obj instanceof this.constructor ?
      obj : $(obj.currentTarget)[this.type](this.getDelegateOptions()).data('bs.' + this.type)

    clearTimeout(self.timeout)

    self.hoverState = 'in'

    if (!self.options.delay || !self.options.delay.show) return self.show()

    self.timeout = setTimeout(function () {
      if (self.hoverState == 'in') self.show()
    }, self.options.delay.show)
  }

  Tooltip.prototype.leave = function (obj) {
    var self = obj instanceof this.constructor ?
      obj : $(obj.currentTarget)[this.type](this.getDelegateOptions()).data('bs.' + this.type)

    clearTimeout(self.timeout)

    self.hoverState = 'out'

    if (!self.options.delay || !self.options.delay.hide) return self.hide()

    self.timeout = setTimeout(function () {
      if (self.hoverState == 'out') self.hide()
    }, self.options.delay.hide)
  }

  Tooltip.prototype.show = function () {
    var e = $.Event('show.bs.' + this.type)

    if (this.hasContent() && this.enabled) {
      this.$element.trigger(e)

      if (e.isDefaultPrevented()) return
      var that = this;

      var $tip = this.tip()

      this.setContent()

      if (this.options.animation) $tip.addClass('fade')

      var placement = typeof this.options.placement == 'function' ?
        this.options.placement.call(this, $tip[0], this.$element[0]) :
        this.options.placement

      var autoToken = /\s?auto?\s?/i
      var autoPlace = autoToken.test(placement)
      if (autoPlace) placement = placement.replace(autoToken, '') || 'top'

      $tip
        .detach()
        .css({ top: 0, left: 0, display: 'block' })
        .addClass(placement)

      this.options.container ? $tip.appendTo(this.options.container) : $tip.insertAfter(this.$element)

      var pos          = this.getPosition()
      var actualWidth  = $tip[0].offsetWidth
      var actualHeight = $tip[0].offsetHeight

      if (autoPlace) {
        var orgPlacement = placement
        var $parent      = this.$element.parent()
        var parentDim    = this.getPosition($parent)

        placement = placement == 'bottom' && pos.top   + pos.height       + actualHeight - parentDim.scroll > parentDim.height ? 'top'    :
                    placement == 'top'    && pos.top   - parentDim.scroll - actualHeight < 0                                   ? 'bottom' :
                    placement == 'right'  && pos.right + actualWidth      > parentDim.width                                    ? 'left'   :
                    placement == 'left'   && pos.left  - actualWidth      < parentDim.left                                     ? 'right'  :
                    placement

        $tip
          .removeClass(orgPlacement)
          .addClass(placement)
      }

      var calculatedOffset = this.getCalculatedOffset(placement, pos, actualWidth, actualHeight)

      this.applyPlacement(calculatedOffset, placement)
      this.hoverState = null

      var complete = function() {
        that.$element.trigger('shown.bs.' + that.type)
      }

      $.support.transition && this.$tip.hasClass('fade') ?
        $tip
          .one($.support.transition.end, complete)
          .emulateTransitionEnd(150) :
        complete()
    }
  }

  Tooltip.prototype.applyPlacement = function (offset, placement) {
    var $tip   = this.tip()
    var width  = $tip[0].offsetWidth
    var height = $tip[0].offsetHeight

    // manually read margins because getBoundingClientRect includes difference
    var marginTop = parseInt($tip.css('margin-top'), 10)
    var marginLeft = parseInt($tip.css('margin-left'), 10)

    // we must check for NaN for ie 8/9
    if (isNaN(marginTop))  marginTop  = 0
    if (isNaN(marginLeft)) marginLeft = 0

    offset.top  = offset.top  + marginTop
    offset.left = offset.left + marginLeft

    // $.fn.offset doesn't round pixel values
    // so we use setOffset directly with our own function B-0
    $.offset.setOffset($tip[0], $.extend({
      using: function (props) {
        $tip.css({
          top: Math.round(props.top),
          left: Math.round(props.left)
        })
      }
    }, offset), 0)

    $tip.addClass('in')

    // check to see if placing tip in new offset caused the tip to resize itself
    var actualWidth  = $tip[0].offsetWidth
    var actualHeight = $tip[0].offsetHeight

    if (placement == 'top' && actualHeight != height) {
      offset.top = offset.top + height - actualHeight
    }

    var delta = this.getViewportAdjustedDelta(placement, offset, actualWidth, actualHeight)

    if (delta.left) offset.left += delta.left
    else offset.top += delta.top

    var arrowDelta          = delta.left ? delta.left * 2 - width + actualWidth : delta.top * 2 - height + actualHeight
    var arrowPosition       = delta.left ? 'left'        : 'top'
    var arrowOffsetPosition = delta.left ? 'offsetWidth' : 'offsetHeight'

    $tip.offset(offset)
    this.replaceArrow(arrowDelta, $tip[0][arrowOffsetPosition], arrowPosition)
  }

  Tooltip.prototype.replaceArrow = function (delta, dimension, position) {
    this.arrow().css(position, delta ? (50 * (1 - delta / dimension) + '%') : '')
  }

  Tooltip.prototype.setContent = function () {
    var $tip  = this.tip()
    var title = this.getTitle()

    $tip.find('.tooltip-inner')[this.options.html ? 'html' : 'text'](title)
    $tip.removeClass('fade in top bottom left right')
  }

  Tooltip.prototype.hide = function () {
    var that = this
    var $tip = this.tip()
    var e    = $.Event('hide.bs.' + this.type)

    function complete() {
      if (that.hoverState != 'in') $tip.detach()
      that.$element.trigger('hidden.bs.' + that.type)
    }

    this.$element.trigger(e)

    if (e.isDefaultPrevented()) return

    $tip.removeClass('in')

    $.support.transition && this.$tip.hasClass('fade') ?
      $tip
        .one($.support.transition.end, complete)
        .emulateTransitionEnd(150) :
      complete()

    this.hoverState = null

    return this
  }

  Tooltip.prototype.fixTitle = function () {
    var $e = this.$element
    if ($e.attr('title') || typeof($e.attr('data-original-title')) != 'string') {
      $e.attr('data-original-title', $e.attr('title') || '').attr('title', '')
    }
  }

  Tooltip.prototype.hasContent = function () {
    return this.getTitle()
  }

  Tooltip.prototype.getPosition = function ($element) {
    $element   = $element || this.$element
    var el     = $element[0]
    var isBody = el.tagName == 'BODY'
    return $.extend({}, (typeof el.getBoundingClientRect == 'function') ? el.getBoundingClientRect() : null, {
      scroll: isBody ? document.documentElement.scrollTop || document.body.scrollTop : $element.scrollTop(),
      width:  isBody ? $(window).width()  : $element.outerWidth(),
      height: isBody ? $(window).height() : $element.outerHeight()
    }, isBody ? {top: 0, left: 0} : $element.offset())
  }

  Tooltip.prototype.getCalculatedOffset = function (placement, pos, actualWidth, actualHeight) {
    return placement == 'bottom' ? { top: pos.top + pos.height,   left: pos.left + pos.width / 2 - actualWidth / 2  } :
           placement == 'top'    ? { top: pos.top - actualHeight, left: pos.left + pos.width / 2 - actualWidth / 2  } :
           placement == 'left'   ? { top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth } :
        /* placement == 'right' */ { top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width   }

  }

  Tooltip.prototype.getViewportAdjustedDelta = function (placement, pos, actualWidth, actualHeight) {
    var delta = { top: 0, left: 0 }
    if (!this.$viewport) return delta

    var viewportPadding = this.options.viewport && this.options.viewport.padding || 0
    var viewportDimensions = this.getPosition(this.$viewport)

    if (/right|left/.test(placement)) {
      var topEdgeOffset    = pos.top - viewportPadding - viewportDimensions.scroll
      var bottomEdgeOffset = pos.top + viewportPadding - viewportDimensions.scroll + actualHeight
      if (topEdgeOffset < viewportDimensions.top) { // top overflow
        delta.top = viewportDimensions.top - topEdgeOffset
      } else if (bottomEdgeOffset > viewportDimensions.top + viewportDimensions.height) { // bottom overflow
        delta.top = viewportDimensions.top + viewportDimensions.height - bottomEdgeOffset
      }
    } else {
      var leftEdgeOffset  = pos.left - viewportPadding
      var rightEdgeOffset = pos.left + viewportPadding + actualWidth
      if (leftEdgeOffset < viewportDimensions.left) { // left overflow
        delta.left = viewportDimensions.left - leftEdgeOffset
      } else if (rightEdgeOffset > viewportDimensions.width) { // right overflow
        delta.left = viewportDimensions.left + viewportDimensions.width - rightEdgeOffset
      }
    }

    return delta
  }

  Tooltip.prototype.getTitle = function () {
    var title
    var $e = this.$element
    var o  = this.options

    title = $e.attr('data-original-title')
      || (typeof o.title == 'function' ? o.title.call($e[0]) :  o.title)

    return title
  }

  Tooltip.prototype.tip = function () {
    return this.$tip = this.$tip || $(this.options.template)
  }

  Tooltip.prototype.arrow = function () {
    return this.$arrow = this.$arrow || this.tip().find('.tooltip-arrow')
  }

  Tooltip.prototype.validate = function () {
    if (!this.$element[0].parentNode) {
      this.hide()
      this.$element = null
      this.options  = null
    }
  }

  Tooltip.prototype.enable = function () {
    this.enabled = true
  }

  Tooltip.prototype.disable = function () {
    this.enabled = false
  }

  Tooltip.prototype.toggleEnabled = function () {
    this.enabled = !this.enabled
  }

  Tooltip.prototype.toggle = function (e) {
    var self = e ? $(e.currentTarget)[this.type](this.getDelegateOptions()).data('bs.' + this.type) : this
    self.tip().hasClass('in') ? self.leave(self) : self.enter(self)
  }

  Tooltip.prototype.destroy = function () {
    clearTimeout(this.timeout)
    this.hide().$element.off('.' + this.type).removeData('bs.' + this.type)
  }


  // TOOLTIP PLUGIN DEFINITION
  // =========================

  var old = $.fn.tooltip

  $.fn.tooltip = function (option) {
    return this.each(function () {
      var $this   = $(this)
      var data    = $this.data('bs.tooltip')
      var options = typeof option == 'object' && option

      if (!data && option == 'destroy') return
      if (!data) $this.data('bs.tooltip', (data = new Tooltip(this, options)))
      if (typeof option == 'string') data[option]()
    })
  }

  $.fn.tooltip.Constructor = Tooltip


  // TOOLTIP NO CONFLICT
  // ===================

  $.fn.tooltip.noConflict = function () {
    $.fn.tooltip = old
    return this
  }

}(jQuery);
/* ========================================================================
 * Bootstrap: popover.js v3.1.1
 * http://getbootstrap.com/javascript/#popovers
 * ========================================================================
 * Copyright 2011-2014 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * ======================================================================== */


+function ($) {
  'use strict';

  // POPOVER PUBLIC CLASS DEFINITION
  // ===============================

  var Popover = function (element, options) {
    this.init('popover', element, options)
  }

  if (!$.fn.tooltip) throw new Error('Popover requires tooltip.js')

  Popover.DEFAULTS = $.extend({}, $.fn.tooltip.Constructor.DEFAULTS, {
    placement: 'right',
    trigger: 'click',
    content: '',
    template: '<div class="popover"><div class="arrow"></div><h3 class="popover-title"></h3><div class="popover-content"></div></div>'
  })


  // NOTE: POPOVER EXTENDS tooltip.js
  // ================================

  Popover.prototype = $.extend({}, $.fn.tooltip.Constructor.prototype)

  Popover.prototype.constructor = Popover

  Popover.prototype.getDefaults = function () {
    return Popover.DEFAULTS
  }

  Popover.prototype.setContent = function () {
    var $tip    = this.tip()
    var title   = this.getTitle()
    var content = this.getContent()

    $tip.find('.popover-title')[this.options.html ? 'html' : 'text'](title)
    $tip.find('.popover-content').empty()[ // we use append for html objects to maintain js events
      this.options.html ? (typeof content == 'string' ? 'html' : 'append') : 'text'
    ](content)

    $tip.removeClass('fade top bottom left right in')

    // IE8 doesn't accept hiding via the `:empty` pseudo selector, we have to do
    // this manually by checking the contents.
    if (!$tip.find('.popover-title').html()) $tip.find('.popover-title').hide()
  }

  Popover.prototype.hasContent = function () {
    return this.getTitle() || this.getContent()
  }

  Popover.prototype.getContent = function () {
    var $e = this.$element
    var o  = this.options

    return $e.attr('data-content')
      || (typeof o.content == 'function' ?
            o.content.call($e[0]) :
            o.content)
  }

  Popover.prototype.arrow = function () {
    return this.$arrow = this.$arrow || this.tip().find('.arrow')
  }

  Popover.prototype.tip = function () {
    if (!this.$tip) this.$tip = $(this.options.template)
    return this.$tip
  }


  // POPOVER PLUGIN DEFINITION
  // =========================

  var old = $.fn.popover

  $.fn.popover = function (option) {
    return this.each(function () {
      var $this   = $(this)
      var data    = $this.data('bs.popover')
      var options = typeof option == 'object' && option

      if (!data && option == 'destroy') return
      if (!data) $this.data('bs.popover', (data = new Popover(this, options)))
      if (typeof option == 'string') data[option]()
    })
  }

  $.fn.popover.Constructor = Popover


  // POPOVER NO CONFLICT
  // ===================

  $.fn.popover.noConflict = function () {
    $.fn.popover = old
    return this
  }

}(jQuery);
/* ========================================================================
 * Bootstrap: carousel.js v3.1.1
 * http://getbootstrap.com/javascript/#carousel
 * ========================================================================
 * Copyright 2011-2014 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * ======================================================================== */


+function ($) {
  'use strict';

  // CAROUSEL CLASS DEFINITION
  // =========================

  var Carousel = function (element, options) {
    this.$element    = $(element)
    this.$indicators = this.$element.find('.carousel-indicators')
    this.options     = options
    this.paused      =
    this.sliding     =
    this.interval    =
    this.$active     =
    this.$items      = null

    this.options.pause == 'hover' && this.$element
      .on('mouseenter', $.proxy(this.pause, this))
      .on('mouseleave', $.proxy(this.cycle, this))
  }

  Carousel.DEFAULTS = {
    interval: 5000,
    pause: 'hover',
    wrap: true
  }

  Carousel.prototype.cycle =  function (e) {
    e || (this.paused = false)

    this.interval && clearInterval(this.interval)

    this.options.interval
      && !this.paused
      && (this.interval = setInterval($.proxy(this.next, this), this.options.interval))

    return this
  }

  Carousel.prototype.getActiveIndex = function () {
    this.$active = this.$element.find('.item.active')
    this.$items  = this.$active.parent().children('.item')

    return this.$items.index(this.$active)
  }

  Carousel.prototype.to = function (pos) {
    var that        = this
    var activeIndex = this.getActiveIndex()

    if (pos > (this.$items.length - 1) || pos < 0) return

    if (this.sliding)       return this.$element.one('slid.bs.carousel', function () { that.to(pos) }) // yes, "slid". not a typo. past tense of "to slide".
    if (activeIndex == pos) return this.pause().cycle()

    return this.slide(pos > activeIndex ? 'next' : 'prev', $(this.$items[pos]))
  }

  Carousel.prototype.pause = function (e) {
    e || (this.paused = true)

    if (this.$element.find('.next, .prev').length && $.support.transition) {
      this.$element.trigger($.support.transition.end)
      this.cycle(true)
    }

    this.interval = clearInterval(this.interval)

    return this
  }

  Carousel.prototype.next = function () {
    if (this.sliding) return
    return this.slide('next')
  }

  Carousel.prototype.prev = function () {
    if (this.sliding) return
    return this.slide('prev')
  }

  Carousel.prototype.slide = function (type, next) {
    var $active   = this.$element.find('.item.active')
    var $next     = next || $active[type]()
    var isCycling = this.interval
    var direction = type == 'next' ? 'left' : 'right'
    var fallback  = type == 'next' ? 'first' : 'last'
    var that      = this

    if (!$next.length) {
      if (!this.options.wrap) return
      $next = this.$element.find('.item')[fallback]()
    }

    if ($next.hasClass('active')) return this.sliding = false

    var e = $.Event('slide.bs.carousel', { relatedTarget: $next[0], direction: direction })
    this.$element.trigger(e)
    if (e.isDefaultPrevented()) return

    this.sliding = true

    isCycling && this.pause()

    if (this.$indicators.length) {
      this.$indicators.find('.active').removeClass('active')
      this.$element.one('slid.bs.carousel', function () { // yes, "slid". not a typo. past tense of "to slide".
        var $nextIndicator = $(that.$indicators.children()[that.getActiveIndex()])
        $nextIndicator && $nextIndicator.addClass('active')
      })
    }

    if ($.support.transition && this.$element.hasClass('slide')) {
      $next.addClass(type)
      $next[0].offsetWidth // force reflow
      $active.addClass(direction)
      $next.addClass(direction)
      $active
        .one($.support.transition.end, function () {
          $next.removeClass([type, direction].join(' ')).addClass('active')
          $active.removeClass(['active', direction].join(' '))
          that.sliding = false
          setTimeout(function () { that.$element.trigger('slid.bs.carousel') }, 0) // yes, "slid". not a typo. past tense of "to slide".
        })
        .emulateTransitionEnd($active.css('transition-duration').slice(0, -1) * 1000)
    } else {
      $active.removeClass('active')
      $next.addClass('active')
      this.sliding = false
      this.$element.trigger('slid.bs.carousel') // yes, "slid". not a typo. past tense of "to slide".
    }

    isCycling && this.cycle()

    return this
  }


  // CAROUSEL PLUGIN DEFINITION
  // ==========================

  var old = $.fn.carousel

  $.fn.carousel = function (option) {
    return this.each(function () {
      var $this   = $(this)
      var data    = $this.data('bs.carousel')
      var options = $.extend({}, Carousel.DEFAULTS, $this.data(), typeof option == 'object' && option)
      var action  = typeof option == 'string' ? option : options.slide

      if (!data) $this.data('bs.carousel', (data = new Carousel(this, options)))
      if (typeof option == 'number') data.to(option)
      else if (action) data[action]()
      else if (options.interval) data.pause().cycle()
    })
  }

  $.fn.carousel.Constructor = Carousel


  // CAROUSEL NO CONFLICT
  // ====================

  $.fn.carousel.noConflict = function () {
    $.fn.carousel = old
    return this
  }


  // CAROUSEL DATA-API
  // =================

  $(document).on('click.bs.carousel.data-api', '[data-slide], [data-slide-to]', function (e) {
    var $this   = $(this), href
    var $target = $($this.attr('data-target') || (href = $this.attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '')) //strip for ie7
    var options = $.extend({}, $target.data(), $this.data())
    var slideIndex = $this.attr('data-slide-to')
    if (slideIndex) options.interval = false

    $target.carousel(options)

    if (slideIndex = $this.attr('data-slide-to')) {
      $target.data('bs.carousel').to(slideIndex)
    }

    e.preventDefault()
  })

  $(window).on('load', function () {
    $('[data-ride="carousel"]').each(function () {
      var $carousel = $(this)
      $carousel.carousel($carousel.data())
    })
  })

}(jQuery);
/* From https://github.com/TimSchlechter/bootstrap-tagsinput/blob/2661784c2c281d3a69b93897ff3f39e4ffa5cbd1/dist/bootstrap-tagsinput.js */

/* The MIT License (MIT)

Copyright (c) 2013 Tim Schlechter

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

/* Retrieved 12 February 2014 */


(function ($) {
  "use strict";

  var defaultOptions = {
    tagClass: function(item) {
      return 'label label-info';
    },
    itemValue: function(item) {
      return item ? item.toString() : item;
    },
    itemText: function(item) {
      return this.itemValue(item);
    },
    freeInput: true,
    maxTags: undefined,
    confirmKeys: [13],
    onTagExists: function(item, $tag) {
      $tag.hide().fadeIn();
    }
  };

  /**
   * Constructor function
   */
  function TagsInput(element, options) {
    this.itemsArray = [];

    this.$element = $(element);
    this.$element.hide();

    this.isSelect = (element.tagName === 'SELECT');
    this.multiple = (this.isSelect && element.hasAttribute('multiple'));
    this.objectItems = options && options.itemValue;
    this.placeholderText = element.hasAttribute('placeholder') ? this.$element.attr('placeholder') : '';
    this.inputSize = Math.max(1, this.placeholderText.length);

    this.$container = $('<div class="bootstrap-tagsinput"></div>');
    this.$input = $('<input size="' + this.inputSize + '" type="text" placeholder="' + this.placeholderText + '"/>').appendTo(this.$container);

    this.$element.after(this.$container);

    this.build(options);
  }

  TagsInput.prototype = {
    constructor: TagsInput,

    /**
     * Adds the given item as a new tag. Pass true to dontPushVal to prevent
     * updating the elements val()
     */
    add: function(item, dontPushVal) {
      var self = this;

      if (self.options.maxTags && self.itemsArray.length >= self.options.maxTags)
        return;

      // Ignore falsey values, except false
      if (item !== false && !item)
        return;

      // Throw an error when trying to add an object while the itemValue option was not set
      if (typeof item === "object" && !self.objectItems)
        throw("Can't add objects when itemValue option is not set");

      // Ignore strings only containg whitespace
      if (item.toString().match(/^\s*$/))
        return;

      // If SELECT but not multiple, remove current tag
      if (self.isSelect && !self.multiple && self.itemsArray.length > 0)
        self.remove(self.itemsArray[0]);

      if (typeof item === "string" && this.$element[0].tagName === 'INPUT') {
        var items = item.split(',');
        if (items.length > 1) {
          for (var i = 0; i < items.length; i++) {
            this.add(items[i], true);
          }

          if (!dontPushVal)
            self.pushVal();
          return;
        }
      }

      var itemValue = self.options.itemValue(item),
          itemText = self.options.itemText(item),
          tagClass = self.options.tagClass(item);

      // Ignore items allready added
      var existing = $.grep(self.itemsArray, function(item) { return self.options.itemValue(item) === itemValue; } )[0];
      if (existing) {
        // Invoke onTagExists
        if (self.options.onTagExists) {
          var $existingTag = $(".tag", self.$container).filter(function() { return $(this).data("item") === existing; });
          self.options.onTagExists(item, $existingTag);
        }
        return;
      }

      // register item in internal array and map
      self.itemsArray.push(item);

      // add a tag element
      var $tag = $('<span class="tag ' + htmlEncode(tagClass) + '">' + htmlEncode(itemText) + '<span data-role="remove"></span></span>');
      $tag.data('item', item);
      self.findInputWrapper().before($tag);
      $tag.after(' ');

      // add <option /> if item represents a value not present in one of the <select />'s options
      if (self.isSelect && !$('option[value="' + escape(itemValue) + '"]',self.$element)[0]) {
        var $option = $('<option selected>' + htmlEncode(itemText) + '</option>');
        $option.data('item', item);
        $option.attr('value', itemValue);
        self.$element.append($option);
      }

      if (!dontPushVal)
        self.pushVal();

      // Add class when reached maxTags
      if (self.options.maxTags === self.itemsArray.length)
        self.$container.addClass('bootstrap-tagsinput-max');

      self.$element.trigger($.Event('itemAdded', { item: item }));
    },

    /**
     * Removes the given item. Pass true to dontPushVal to prevent updating the
     * elements val()
     */
    remove: function(item, dontPushVal) {
      var self = this;

      if (self.objectItems) {
        if (typeof item === "object")
          item = $.grep(self.itemsArray, function(other) { return self.options.itemValue(other) ==  self.options.itemValue(item); } )[0];
        else
          item = $.grep(self.itemsArray, function(other) { return self.options.itemValue(other) ==  item; } )[0];
      }

      if (item) {
        $('.tag', self.$container).filter(function() { return $(this).data('item') === item; }).remove();
        $('option', self.$element).filter(function() { return $(this).data('item') === item; }).remove();
        self.itemsArray.splice($.inArray(item, self.itemsArray), 1);
      }

      if (!dontPushVal)
        self.pushVal();

      // Remove class when reached maxTags
      if (self.options.maxTags > self.itemsArray.length)
        self.$container.removeClass('bootstrap-tagsinput-max');

      self.$element.trigger($.Event('itemRemoved',  { item: item }));
    },

    /**
     * Removes all items
     */
    removeAll: function() {
      var self = this;

      $('.tag', self.$container).remove();
      $('option', self.$element).remove();

      while(self.itemsArray.length > 0)
        self.itemsArray.pop();

      self.pushVal();

      if (self.options.maxTags && !this.isEnabled())
        this.enable();
    },

    /**
     * Refreshes the tags so they match the text/value of their corresponding
     * item.
     */
    refresh: function() {
      var self = this;
      $('.tag', self.$container).each(function() {
        var $tag = $(this),
            item = $tag.data('item'),
            itemValue = self.options.itemValue(item),
            itemText = self.options.itemText(item),
            tagClass = self.options.tagClass(item);

          // Update tag's class and inner text
          $tag.attr('class', null);
          $tag.addClass('tag ' + htmlEncode(tagClass));
          $tag.contents().filter(function() {
            return this.nodeType == 3;
          })[0].nodeValue = htmlEncode(itemText);

          if (self.isSelect) {
            var option = $('option', self.$element).filter(function() { return $(this).data('item') === item; });
            option.attr('value', itemValue);
          }
      });
    },

    /**
     * Returns the items added as tags
     */
    items: function() {
      return this.itemsArray;
    },

    /**
     * Assembly value by retrieving the value of each item, and set it on the
     * element. 
     */
    pushVal: function() {
      var self = this,
          val = $.map(self.items(), function(item) {
            return self.options.itemValue(item).toString();
          });

      self.$element.val(val, true).trigger('change');
    },

    /**
     * Initializes the tags input behaviour on the element
     */
    build: function(options) {
      var self = this;

      self.options = $.extend({}, defaultOptions, options);
      var typeahead = self.options.typeahead || {};

      // When itemValue is set, freeInput should always be false
      if (self.objectItems)
        self.options.freeInput = false;

      makeOptionItemFunction(self.options, 'itemValue');
      makeOptionItemFunction(self.options, 'itemText');
      makeOptionItemFunction(self.options, 'tagClass');

      // for backwards compatibility, self.options.source is deprecated
      if (self.options.source)
        typeahead.source = self.options.source;

      if (typeahead.source && $.fn.typeahead) {
        makeOptionFunction(typeahead, 'source');

        self.$input.typeahead({
          source: function (query, process) {
            function processItems(items) {
              var texts = [];

              for (var i = 0; i < items.length; i++) {
                var text = self.options.itemText(items[i]);
                map[text] = items[i];
                texts.push(text);
              }
              process(texts);
            }

            this.map = {};
            var map = this.map,
                data = typeahead.source(query);

            if ($.isFunction(data.success)) {
              // support for Angular promises
              data.success(processItems);
            } else {
              // support for functions and jquery promises
              $.when(data)
               .then(processItems);
            }
          },
          updater: function (text) {
            self.add(this.map[text]);
          },
          matcher: function (text) {
            return (text.toLowerCase().indexOf(this.query.trim().toLowerCase()) !== -1);
          },
          sorter: function (texts) {
            return texts.sort();
          },
          highlighter: function (text) {
            var regex = new RegExp( '(' + this.query + ')', 'gi' );
            return text.replace( regex, "<strong>$1</strong>" );
          }
        });
      }

      self.$container.on('click', $.proxy(function(event) {
        self.$input.focus();
      }, self));

      self.$container.on('keydown', 'input', $.proxy(function(event) {
        var $input = $(event.target),
            $inputWrapper = self.findInputWrapper();

        switch (event.which) {
          // BACKSPACE
          case 8:
            if (doGetCaretPosition($input[0]) === 0) {
              var prev = $inputWrapper.prev();
              if (prev) {
                self.remove(prev.data('item'));
              }
            }
            break;

          // DELETE
          case 46:
            if (doGetCaretPosition($input[0]) === 0) {
              var next = $inputWrapper.next();
              if (next) {
                self.remove(next.data('item'));
              }
            }
            break;

          // LEFT ARROW
          case 37:
            // Try to move the input before the previous tag
            var $prevTag = $inputWrapper.prev();
            if ($input.val().length === 0 && $prevTag[0]) {
              $prevTag.before($inputWrapper);
              $input.focus();
            }
            break;
          // RIGHT ARROW
          case 39:
            // Try to move the input after the next tag
            var $nextTag = $inputWrapper.next();
            if ($input.val().length === 0 && $nextTag[0]) {
              $nextTag.after($inputWrapper);
              $input.focus();
            }
            break;
         default:
            // When key corresponds one of the confirmKeys, add current input
            // as a new tag
            if (self.options.freeInput && $.inArray(event.which, self.options.confirmKeys) >= 0) {
              self.add($input.val());
              $input.val('');
              event.preventDefault();
            }
        }

        // Reset internal input's size
        $input.attr('size', Math.max(this.inputSize, $input.val().length));
      }, self));

      // Remove icon clicked
      self.$container.on('click', '[data-role=remove]', $.proxy(function(event) {
        self.remove($(event.target).closest('.tag').data('item'));
      }, self));

      // Only add existing value as tags when using strings as tags
      if (self.options.itemValue === defaultOptions.itemValue) {
        if (self.$element[0].tagName === 'INPUT') {
            self.add(self.$element.val());
        } else {
          $('option', self.$element).each(function() {
            self.add($(this).attr('value'), true);
          });
        }
      }
    },

    /**
     * Removes all tagsinput behaviour and unregsiter all event handlers
     */
    destroy: function() {
      var self = this;

      // Unbind events
      self.$container.off('keypress', 'input');
      self.$container.off('click', '[role=remove]');

      self.$container.remove();
      self.$element.removeData('tagsinput');
      self.$element.show();
    },

    /**
     * Sets focus on the tagsinput 
     */
    focus: function() {
      this.$input.focus();
    },

    /**
     * Returns the internal input element
     */
    input: function() {
      return this.$input;
    },

    /**
     * Returns the element which is wrapped around the internal input. This
     * is normally the $container, but typeahead.js moves the $input element.
     */
    findInputWrapper: function() {
      var elt = this.$input[0],
          container = this.$container[0];
      while(elt && elt.parentNode !== container)
        elt = elt.parentNode;

      return $(elt);
    }
  };

  /**
   * Register JQuery plugin
   */
  $.fn.tagsinput = function(arg1, arg2) {
    var results = [];

    this.each(function() {
      var tagsinput = $(this).data('tagsinput');

      // Initialize a new tags input
      if (!tagsinput) {
        tagsinput = new TagsInput(this, arg1);
        $(this).data('tagsinput', tagsinput);
        results.push(tagsinput);

        if (this.tagName === 'SELECT') {
          $('option', $(this)).attr('selected', 'selected');
        }

        // Init tags from $(this).val()
        $(this).val($(this).val());
      } else {
        // Invoke function on existing tags input
        var retVal = tagsinput[arg1](arg2);
        if (retVal !== undefined)
          results.push(retVal);
      }
    });

    if ( typeof arg1 == 'string') {
      // Return the results from the invoked function calls
      return results.length > 1 ? results : results[0];
    } else {
      return results;
    }
  };

  $.fn.tagsinput.Constructor = TagsInput;
  
  /**
   * Most options support both a string or number as well as a function as 
   * option value. This function makes sure that the option with the given
   * key in the given options is wrapped in a function
   */
  function makeOptionItemFunction(options, key) {
    if (typeof options[key] !== 'function') {
      var propertyName = options[key];
      options[key] = function(item) { return item[propertyName]; };
    }
  }
  function makeOptionFunction(options, key) {
    if (typeof options[key] !== 'function') {
      var value = options[key];
      options[key] = function() { return value; };
    }
  }
  /**
   * HtmlEncodes the given value
   */
  var htmlEncodeContainer = $('<div />');
  function htmlEncode(value) {
    if (value) {
      return htmlEncodeContainer.text(value).html();
    } else {
      return '';
    }
  }

  /**
   * Returns the position of the caret in the given input field
   * http://flightschool.acylt.com/devnotes/caret-position-woes/
   */
  function doGetCaretPosition(oField) {
    var iCaretPos = 0;
    if (document.selection) {
      oField.focus ();
      var oSel = document.selection.createRange();
      oSel.moveStart ('character', -oField.value.length);
      iCaretPos = oSel.text.length;
    } else if (oField.selectionStart || oField.selectionStart == '0') {
      iCaretPos = oField.selectionStart;
    }
    return (iCaretPos);
  }

  /**
   * Initialize tagsinput behaviour on inputs and selects which have
   * data-role=tagsinput
   */
  $(function() {
    $("input[data-role=tagsinput], select[multiple][data-role=tagsinput]").tagsinput();
  });
})(window.jQuery);

(function() {
  window.SocialShareButton = {
    openUrl: function(url) {
      window.open(url);
      return false;
    },
    share: function(el) {
      var get_tumblr_extra, img, site, title, tumblr_params, url;
      site = $(el).data('site');
      title = encodeURIComponent($(el).parent().data('title') || '');
      img = encodeURIComponent($(el).parent().data("img") || '');
      url = encodeURIComponent($(el).parent().data("url") || '');
      if (url.length === 0) {
        url = encodeURIComponent(location.href);
      }
      switch (site) {
        case "email":
          location.href = "mailto:?to=&subject=" + title + "&body=" + url;
          break;
        case "weibo":
          SocialShareButton.openUrl("http://service.weibo.com/share/share.php?url=" + url + "&type=3&pic=" + img + "&title=" + title);
          break;
        case "twitter":
          SocialShareButton.openUrl("https://twitter.com/home?status=" + title + ": " + url);
          break;
        case "douban":
          SocialShareButton.openUrl("http://shuo.douban.com/!service/share?href=" + url + "&name=" + title + "&image=" + img);
          break;
        case "facebook":
          SocialShareButton.openUrl("http://www.facebook.com/sharer.php?u=" + url);
          break;
        case "qq":
          SocialShareButton.openUrl("http://sns.qzone.qq.com/cgi-bin/qzshare/cgi_qzshare_onekey?url=" + url + "&title=" + title + "&pics=" + img);
          break;
        case "tqq":
          SocialShareButton.openUrl("http://share.v.t.qq.com/index.php?c=share&a=index&url=" + url + "&title=" + title + "&pic=" + img);
          break;
        case "baidu":
          SocialShareButton.openUrl("http://hi.baidu.com/pub/show/share?url=" + url + "&title=" + title + "&content=");
          break;
        case "kaixin001":
          SocialShareButton.openUrl("http://www.kaixin001.com/rest/records.php?url=" + url + "&content=" + title + "&style=11&pic=" + img);
          break;
        case "renren":
          SocialShareButton.openUrl("http://widget.renren.com/dialog/share?resourceUrl=" + url + "&srcUrl=" + url + "&title=" + title + "&pic=" + img + "&description=");
          break;
        case "google_plus":
          SocialShareButton.openUrl("https://plus.google.com/share?url=" + url);
          break;
        case "google_bookmark":
          SocialShareButton.openUrl("https://www.google.com/bookmarks/mark?op=edit&output=popup&bkmk=" + url + "&title=" + title);
          break;
        case "delicious":
          SocialShareButton.openUrl("http://www.delicious.com/save?url=" + url + "&title=" + title + "&jump=yes&pic=" + img);
          break;
        case "plurk":
          SocialShareButton.openUrl("http://www.plurk.com/?status=" + title + ": " + url + "&qualifier=shares");
          break;
        case "pinterest":
          SocialShareButton.openUrl("http://www.pinterest.com/pin/create/button/?url=" + url + "&media=" + img + "&description=" + title);
          break;
        case "tumblr":
          get_tumblr_extra = function(param) {
            var cutom_data;
            cutom_data = $(el).attr("data-" + param);
            if (cutom_data) {
              return encodeURIComponent(cutom_data);
            }
          };
          tumblr_params = function() {
            var params, path, quote, source;
            path = get_tumblr_extra('type') || 'link';
            params = (function() {
              switch (path) {
                case 'text':
                  title = get_tumblr_extra('title') || title;
                  return "title=" + title;
                case 'photo':
                  title = get_tumblr_extra('caption') || title;
                  source = get_tumblr_extra('source') || img;
                  return "caption=" + title + "&source=" + source;
                case 'quote':
                  quote = get_tumblr_extra('quote') || title;
                  source = get_tumblr_extra('source') || '';
                  return "quote=" + quote + "&source=" + source;
                default:
                  title = get_tumblr_extra('title') || title;
                  url = get_tumblr_extra('url') || url;
                  return "name=" + title + "&url=" + url;
              }
            })();
            return "/" + path + "?" + params;
          };
          SocialShareButton.openUrl("http://www.tumblr.com/share" + (tumblr_params()));
      }
      return false;
    }
  };

}).call(this);
//! OpenSeadragon 1.0.0
//! Built on 2014-04-17
//! Git commit: v1.0.0-122-g5dafa32-dirty
//! http://openseadragon.github.io
//! License: http://openseadragon.github.io/license/

/*
 * OpenSeadragon
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Portions of this source file taken from jQuery:
 *
 * Copyright 2011 John Resig
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/*
 * Portions of this source file taken from mattsnider.com:
 *
 * Copyright (c) 2006-2013 Matt Snider
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
 * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */


/**
 * @version  OpenSeadragon 1.0.0
 *
 * @file
 * <h2><strong>OpenSeadragon - Javascript Deep Zooming</strong></h2>
 * <p>
 * OpenSeadragon provides an html interface for creating
 * deep zoom user interfaces.  The simplest examples include deep
 * zoom for large resolution images, and complex examples include
 * zoomable map interfaces driven by SVG files.
 * </p>
 *
 */

/**
 * @module OpenSeadragon
 *
 */

/**
 * @namespace OpenSeadragon
 *
 * @classdesc The root namespace for OpenSeadragon.  All utility methods
 * and classes are defined on or below this namespace.
 *
 */


// Typedefs

 /**
  * All required and optional settings for instantiating a new instance of an OpenSeadragon image viewer.
  *
  * @typedef {Object} Options
  * @memberof OpenSeadragon
  *
  * @property {String} id
  *     Id of the element to append the viewer's container element to. If not provided, the 'element' property must be provided.
  *     If both the element and id properties are specified, the viewer is appended to the element provided in the element property.
  *
  * @property {Element} element
  *     The element to append the viewer's container element to. If not provided, the 'id' property must be provided.
  *     If both the element and id properties are specified, the viewer is appended to the element provided in the element property.
  *
  * @property {Array|String|Function|Object[]|Array[]|String[]|Function[]} [tileSources=null]
  *     As an Array, the tileSource can hold either Objects or mixed
  *     types of Arrays of Objects, Strings, or Functions. When a value is a String,
  *     the tileSource is used to create a {@link OpenSeadragon.DziTileSource}.
  *     When a value is a Function, the function is used to create a new
  *     {@link OpenSeadragon.TileSource} whose abstract method
  *     getUrl( level, x, y ) is implemented by the function. Finally, when it
  *     is an Array of objects, it is used to create a
  *     {@link OpenSeadragon.LegacyTileSource}.
  *
  * @property {Array} overlays Array of objects defining permanent overlays of
  *     the viewer. The overlays added via this option and later removed with
  *     {@link OpenSeadragon.Viewer#removeOverlay} will be added back when a new
  *     image is opened.
  *     To add overlays which can be definitively removed, one must use
  *     {@link OpenSeadragon.Viewer#addOverlay}
  *     If displaying a sequence of images, the overlays can be associated
  *     with a specific page by passing the overlays array to the page's
  *     tile source configuration.
  *     Expected properties:
  *     * x, y, (or px, py for pixel coordinates) to define the location.
  *     * width, height in point if using x,y or in pixels if using px,py. If width
  *       and height are specified, the overlay size is adjusted when zooming,
  *       otherwise the size stays the size of the content (or the size defined by CSS).
  *     * className to associate a class to the overlay
  *     * id to set the overlay element. If an element with this id already exists,
  *       it is reused, otherwise it is created. If not specified, a new element is
  *       created.
  *     * placement a string to define the relative position to the viewport.
  *       Only used if no width and height are specified. Default: 'TOP_LEFT'.
  *       See {@link OpenSeadragon.OverlayPlacement} for possible values.
  *
  * @property {String} [xmlPath=null]
  *     <strong>DEPRECATED</strong>. A relative path to load a DZI file from the server.
  *     Prefer the newer Options.tileSources.
  *
  * @property {String} [prefixUrl='/images/']
  *     Prepends the prefixUrl to navImages paths, which is very useful
  *     since the default paths are rarely useful for production
  *     environments.
  *
  * @property {OpenSeadragon.NavImages} [navImages]
  *     An object with a property for each button or other built-in navigation
  *     control, eg the current 'zoomIn', 'zoomOut', 'home', and 'fullpage'.
  *     Each of those in turn provides an image path for each state of the button
  *     or navigation control, eg 'REST', 'GROUP', 'HOVER', 'PRESS'. Finally the
  *     image paths, by default assume there is a folder on the servers root path
  *     called '/images', eg '/images/zoomin_rest.png'.  If you need to adjust
  *     these paths, prefer setting the option.prefixUrl rather than overriding
  *     every image path directly through this setting.
  *
  * @property {Object} [tileHost=null]
  *     TODO: Implement this. Currently not used.
  *
  * @property {Boolean} [debugMode=false]
  *     TODO: provide an in-screen panel providing event detail feedback.
  *
  * @property {String} [debugGridColor='#437AB2']
  *
  * @property {Number} [animationTime=1.2]
  *     Specifies the animation duration per each {@link OpenSeadragon.Spring}
  *     which occur when the image is dragged or zoomed.
  *
  * @property {Number} [blendTime=0]
  *     Specifies the duration of animation as higher or lower level tiles are
  *     replacing the existing tile.
  *
  * @property {Boolean} [alwaysBlend=false]
  *     Forces the tile to always blend.  By default the tiles skip blending
  *     when the blendTime is surpassed and the current animation frame would
  *     not complete the blend.
  *
  * @property {Boolean} [autoHideControls=true]
  *     If the user stops interacting with the viewport, fade the navigation
  *     controls.  Useful for presentation since the controls are by default
  *     floated on top of the image the user is viewing.
  *
  * @property {Boolean} [immediateRender=false]
  *     Render the best closest level first, ignoring the lowering levels which
  *     provide the effect of very blurry to sharp. It is recommended to change
  *     setting to true for mobile devices.
  *
  * @property {Number} [defaultZoomLevel=0]
  *     Zoom level to use when image is first opened or the home button is clicked.
  *     If 0, adjusts to fit viewer.
  *
  * @property {Number} [opacity=1]
  *     Opacity of the drawer (1=opaque, 0=transparent)
  *
  * @property {Number} [layersAspectRatioEpsilon=0.0001]
  *     Maximum aspectRatio mismatch between 2 layers.
  *
  * @property {Number} [degrees=0]
  *     Initial rotation.
  *
  * @property {Number} [minZoomLevel=null]
  *
  * @property {Number} [maxZoomLevel=null]
  *
  * @property {Boolean} [panHorizontal=true]
  *     Allow horizontal pan.
  *
  * @property {Boolean} [panVertical=true]
  *     Allow vertical pan.
  *
  * @property {Boolean} [constrainDuringPan=false]
  *
  * @property {Boolean} [wrapHorizontal=false]
  *     Set to true to force the image to wrap horizontally within the viewport.
  *     Useful for maps or images representing the surface of a sphere or cylinder.
  *
  * @property {Boolean} [wrapVertical=false]
  *     Set to true to force the image to wrap vertically within the viewport.
  *     Useful for maps or images representing the surface of a sphere or cylinder.
  *
  * @property {Number} [minZoomImageRatio=0.9]
  *     The minimum percentage ( expressed as a number between 0 and 1 ) of
  *     the viewport height or width at which the zoom out will be constrained.
  *     Setting it to 0, for example will allow you to zoom out infinitly.
  *
  * @property {Number} [maxZoomPixelRatio=1.1]
  *     The maximum ratio to allow a zoom-in to affect the highest level pixel
  *     ratio. This can be set to Infinity to allow 'infinite' zooming into the
  *     image though it is less effective visually if the HTML5 Canvas is not
  *     availble on the viewing device.
  *
  * @property {Boolean} [autoResize=true]
  *     Set to false to prevent polling for viewer size changes. Useful for providing custom resize behavior.
  *
  * @property {Number} [pixelsPerWheelLine=40]
  *     For pixel-resolution scrolling devices, the number of pixels equal to one scroll line.
  *
  * @property {Number} [visibilityRatio=0.5]
  *     The percentage ( as a number from 0 to 1 ) of the source image which
  *     must be kept within the viewport.  If the image is dragged beyond that
  *     limit, it will 'bounce' back until the minimum visibility ration is
  *     achieved.  Setting this to 0 and wrapHorizontal ( or wrapVertical ) to
  *     true will provide the effect of an infinitely scrolling viewport.
  *
  * @property {Number} [springStiffness=7.0]
  *
  * @property {Number} [imageLoaderLimit=0]
  *     The maximum number of image requests to make concurrently.  By default
  *     it is set to 0 allowing the browser to make the maximum number of
  *     image requests in parallel as allowed by the browsers policy.
  *
  * @property {Number} [clickTimeThreshold=300]
  *     If multiple mouse clicks occurs within less than this number of
  *     milliseconds, treat them as a single click.
  *
  * @property {Number} [clickDistThreshold=5]
  *     If a mouse or touch drag occurs and the distance to the starting drag
  *     point is less than this many pixels, ignore the drag event.
  *
  * @property {Number} [zoomPerClick=2.0]
  *     The "zoom distance" per mouse click or touch tap. <em><strong>Note:</strong> Setting this to 1.0 effectively disables the click-to-zoom feature.</em>
  *
  * @property {Number} [zoomPerScroll=1.2]
  *     The "zoom distance" per mouse scroll or touch pinch. <em><strong>Note:</strong> Setting this to 1.0 effectively disables the mouse-wheel zoom feature.</em>
  *
  * @property {Number} [zoomPerSecond=1.0]
  *     The number of seconds to animate a single zoom event over.
  *
  * @property {Boolean} [showNavigator=false]
  *     Set to true to make the navigator minimap appear.
  *
  * @property {Boolean} [navigatorId=navigator-GENERATED DATE]
  *     The ID of a div to hold the navigator minimap.
  *     If an ID is specified, the navigatorPosition, navigatorSizeRatio, navigatorMaintainSizeRatio, and navigatorTop|Left|Height|Width options will be ignored.
  *     If an ID is not specified, a div element will be generated and placed on top of the main image.
  *
  * @property {String} [navigatorPosition='TOP_RIGHT']
  *     Valid values are 'TOP_LEFT', 'TOP_RIGHT', 'BOTTOM_LEFT', 'BOTTOM_RIGHT', or 'ABSOLUTE'.<br>
  *     If 'ABSOLUTE' is specified, then navigatorTop|Left|Height|Width determines the size and position of the navigator minimap in the viewer, and navigatorSizeRatio and navigatorMaintainSizeRatio are ignored.<br>
  *     For 'TOP_LEFT', 'TOP_RIGHT', 'BOTTOM_LEFT', and 'BOTTOM_RIGHT', the navigatorSizeRatio or navigatorHeight|Width values determine the size of the navigator minimap.
  *
  * @property {Number} [navigatorSizeRatio=0.2]
  *     Ratio of navigator size to viewer size. Ignored if navigatorHeight|Width are specified.
  *
  * @property {Boolean} [navigatorMaintainSizeRatio=false]
  *     If true, the navigator minimap is resized (using navigatorSizeRatio) when the viewer size changes.
  *
  * @property {Number|String} [navigatorTop=null]
  *     Specifies the location of the navigator minimap (see navigatorPosition).
  *
  * @property {Number|String} [navigatorLeft=null]
  *     Specifies the location of the navigator minimap (see navigatorPosition).
  *
  * @property {Number|String} [navigatorHeight=null]
  *     Specifies the size of the navigator minimap (see navigatorPosition).
  *     If specified, navigatorSizeRatio and navigatorMaintainSizeRatio are ignored.
  *
  * @property {Number|String} [navigatorWidth=null]
  *     Specifies the size of the navigator minimap (see navigatorPosition).
  *     If specified, navigatorSizeRatio and navigatorMaintainSizeRatio are ignored.
  *
  * @property {Boolean} [navigatorAutoResize=true]
  *     Set to false to prevent polling for navigator size changes. Useful for providing custom resize behavior.
  *     Setting to false can also improve performance when the navigator is configured to a fixed size.
  *
  * @property {Number} [controlsFadeDelay=2000]
  *     The number of milliseconds to wait once the user has stopped interacting
  *     with the interface before begining to fade the controls. Assumes
  *     showNavigationControl and autoHideControls are both true.
  *
  * @property {Number} [controlsFadeLength=1500]
  *     The number of milliseconds to animate the controls fading out.
  *
  * @property {Number} [maxImageCacheCount=200]
  *     The max number of images we should keep in memory (per drawer).
  *
  * @property {Number} [timeout=30000]
  *
  * @property {Boolean} [useCanvas=true]
  *     Set to false to not use an HTML canvas element for image rendering even if canvas is supported.
  *
  * @property {Number} [minPixelRatio=0.5]
  *     The higher the minPixelRatio, the lower the quality of the image that
  *     is considered sufficient to stop rendering a given zoom level.  For
  *     example, if you are targeting mobile devices with less bandwith you may
  *     try setting this to 1.5 or higher.
  *
  * @property {Boolean} [mouseNavEnabled=true]
  *     Is the user able to interact with the image via mouse or touch. Default
  *     interactions include draging the image in a plane, and zooming in toward
  *     and away from the image.
  *
  * @property {Boolean} [showNavigationControl=true]
  *     Set to false to prevent the appearance of the default navigation controls.<br>
  *     Note that if set to false, the customs buttons set by the options
  *     zoomInButton, zoomOutButton etc, are rendered inactive.
  *
  * @property {OpenSeadragon.ControlAnchor} [navigationControlAnchor=TOP_LEFT]
  *     Placement of the default navigation controls.
  *     To set the placement of the sequence controls, see the
  *     sequenceControlAnchor option.
  *
  * @property {Boolean} [showZoomControl=true]
  *     If true then + and - buttons to zoom in and out are displayed.<br>
  *     Note: {@link OpenSeadragon.Options.showNavigationControl} is overriding
  *     this setting when set to false.
  *
  * @property {Boolean} [showHomeControl=true]
  *     If true then the 'Go home' button is displayed to go back to the original
  *     zoom and pan.<br>
  *     Note: {@link OpenSeadragon.Options.showNavigationControl} is overriding
  *     this setting when set to false.
  *
  * @property {Boolean} [showFullPageControl=true]
  *     If true then the 'Toggle full page' button is displayed to switch
  *     between full page and normal mode.<br>
  *     Note: {@link OpenSeadragon.Options.showNavigationControl} is overriding
  *     this setting when set to false.
  *
  * @property {Boolean} [showRotationControl=false]
  *     If true then the rotate left/right controls will be displayed as part of the
  *     standard controls. This is also subject to the browser support for rotate
  *     (e.g. viewer.drawer.canRotate()).<br>
  *     Note: {@link OpenSeadragon.Options.showNavigationControl} is overriding
  *     this setting when set to false.
  *
  * @property {Boolean} [showSequenceControl=true]
  *     If the viewer has been configured with a sequence of tile sources, then
  *     provide buttons for navigating forward and backward through the images.
  *
  * @property {OpenSeadragon.ControlAnchor} [sequenceControlAnchor=TOP_LEFT]
  *     Placement of the default sequence controls.
  *
  * @property {Boolean} [navPrevNextWrap=false]
  *     If true then the 'previous' button will wrap to the last image when
  *     viewing the first image and the 'next' button will wrap to the first
  *     image when viewing the last image.
  *
  * @property {String} zoomInButton
  *     Set the id of the custom 'Zoom in' button to use.
  *     This is useful to have a custom button anywhere in the web page.<br>
  *     To only change the button images, consider using
  *     {@link OpenSeadragon.Options.navImages}
  *
  * @property {String} zoomOutButton
  *     Set the id of the custom 'Zoom out' button to use.
  *     This is useful to have a custom button anywhere in the web page.<br>
  *     To only change the button images, consider using
  *     {@link OpenSeadragon.Options.navImages}
  *
  * @property {String} homeButton
  *     Set the id of the custom 'Go home' button to use.
  *     This is useful to have a custom button anywhere in the web page.<br>
  *     To only change the button images, consider using
  *     {@link OpenSeadragon.Options.navImages}
  *
  * @property {String} fullPageButton
  *     Set the id of the custom 'Toggle full page' button to use.
  *     This is useful to have a custom button anywhere in the web page.<br>
  *     To only change the button images, consider using
  *     {@link OpenSeadragon.Options.navImages}
  *
  * @property {String} rotateLeftButton
  *     Set the id of the custom 'Rotate left' button to use.
  *     This is useful to have a custom button anywhere in the web page.<br>
  *     To only change the button images, consider using
  *     {@link OpenSeadragon.Options.navImages}
  *
  * @property {String} rotateRightButton
  *     Set the id of the custom 'Rotate right' button to use.
  *     This is useful to have a custom button anywhere in the web page.<br>
  *     To only change the button images, consider using
  *     {@link OpenSeadragon.Options.navImages}
  *
  * @property {String} previousButton
  *     Set the id of the custom 'Previous page' button to use.
  *     This is useful to have a custom button anywhere in the web page.<br>
  *     To only change the button images, consider using
  *     {@link OpenSeadragon.Options.navImages}
  *
  * @property {String} nextButton
  *     Set the id of the custom 'Next page' button to use.
  *     This is useful to have a custom button anywhere in the web page.<br>
  *     To only change the button images, consider using
  *     {@link OpenSeadragon.Options.navImages}
  *
  * @property {Number} [initialPage=0]
  *     If the viewer has been configured with a sequence of tile sources, display this page initially.
  *
  * @property {Boolean} [preserveViewport=false]
  *     If the viewer has been configured with a sequence of tile sources, then
  *     normally navigating to through each image resets the viewport to 'home'
  *     position.  If preserveViewport is set to true, then the viewport position
  *     is preserved when navigating between images in the sequence.
  *
  * @property {Boolean} [showReferenceStrip=false]
  *     If the viewer has been configured with a sequence of tile sources, then
  *     display a scrolling strip of image thumbnails for navigating through the images.
  *
  * @property {String} [referenceStripScroll='horizontal']
  *
  * @property {Element} [referenceStripElement=null]
  *
  * @property {Number} [referenceStripHeight=null]
  *
  * @property {Number} [referenceStripWidth=null]
  *
  * @property {String} [referenceStripPosition='BOTTOM_LEFT']
  *
  * @property {Number} [referenceStripSizeRatio=0.2]
  *
  * @property {Boolean} [collectionMode=false]
  *
  * @property {Number} [collectionRows=3]
  *
  * @property {String} [collectionLayout='horizontal']
  *
  * @property {Number} [collectionTileSize=800]
  *
  * @property {String|Boolean} [crossOriginPolicy=false]
  *      Valid values are 'Anonymous', 'use-credentials', and false. If false, canvas requests will
  *      not use CORS, and the canvas will be tainted.
  *
  */

/**
  * The names for the image resources used for the image navigation buttons.
  *
  * @typedef {Object} NavImages
  * @memberof OpenSeadragon
  *
  * @property {Object} zoomIn - Images for the zoom-in button.
  * @property {String} zoomIn.REST
  * @property {String} zoomIn.GROUP
  * @property {String} zoomIn.HOVER
  * @property {String} zoomIn.DOWN
  *
  * @property {Object} zoomOut - Images for the zoom-out button.
  * @property {String} zoomOut.REST
  * @property {String} zoomOut.GROUP
  * @property {String} zoomOut.HOVER
  * @property {String} zoomOut.DOWN
  *
  * @property {Object} home - Images for the home button.
  * @property {String} home.REST
  * @property {String} home.GROUP
  * @property {String} home.HOVER
  * @property {String} home.DOWN
  *
  * @property {Object} fullpage - Images for the full-page button.
  * @property {String} fullpage.REST
  * @property {String} fullpage.GROUP
  * @property {String} fullpage.HOVER
  * @property {String} fullpage.DOWN
  *
  * @property {Object} rotateleft - Images for the rotate left button.
  * @property {String} rotateleft.REST
  * @property {String} rotateleft.GROUP
  * @property {String} rotateleft.HOVER
  * @property {String} rotateleft.DOWN
  *
  * @property {Object} rotateright - Images for the rotate right button.
  * @property {String} rotateright.REST
  * @property {String} rotateright.GROUP
  * @property {String} rotateright.HOVER
  * @property {String} rotateright.DOWN
  *
  * @property {Object} previous - Images for the previous button.
  * @property {String} previous.REST
  * @property {String} previous.GROUP
  * @property {String} previous.HOVER
  * @property {String} previous.DOWN
  *
  * @property {Object} next - Images for the next button.
  * @property {String} next.REST
  * @property {String} next.GROUP
  * @property {String} next.HOVER
  * @property {String} next.DOWN
  *
  */


 /**
  * This function serves as a single point of instantiation for an {@link OpenSeadragon.Viewer}, including all
  * combinations of out-of-the-box configurable features.
  *
  * @function OpenSeadragon
  * @memberof module:OpenSeadragon
  * @param {OpenSeadragon.Options} options - Viewer options.
  * @returns {OpenSeadragon.Viewer}
  */

window.OpenSeadragon = window.OpenSeadragon || function( options ){

    return new OpenSeadragon.Viewer( options );

};


(function( $ ){


    /**
     * The OpenSeadragon version.
     *
     * @member {Object} OpenSeadragon.version
     * @property {String} versionStr - The version number as a string ('major.minor.revision').
     * @property {Number} major - The major version number.
     * @property {Number} minor - The minor version number.
     * @property {Number} revision - The revision number.
     * @since 1.0.0
     */
    /* jshint ignore:start */
    $.version = {
        versionStr: '1.0.0',
        major: 1,
        minor: 0,
        revision: 0
    };
    /* jshint ignore:end */


    /**
     * Taken from jquery 1.6.1
     * [[Class]] -> type pairs
     * @private
     */
    var class2type = {
            '[object Boolean]':     'boolean',
            '[object Number]':      'number',
            '[object String]':      'string',
            '[object Function]':    'function',
            '[object Array]':       'array',
            '[object Date]':        'date',
            '[object RegExp]':      'regexp',
            '[object Object]':      'object'
        },
        // Save a reference to some core methods
        toString    = Object.prototype.toString,
        hasOwn      = Object.prototype.hasOwnProperty;

    /**
     * Taken from jQuery 1.6.1
     * @function isFunction
     * @memberof OpenSeadragon
     * @see {@link http://www.jquery.com/ jQuery}
     */
    $.isFunction = function( obj ) {
        return $.type(obj) === "function";
    };


    /**
     * Taken from jQuery 1.6.1
     * @function isArray
     * @memberof OpenSeadragon
     * @see {@link http://www.jquery.com/ jQuery}
     */
    $.isArray = Array.isArray || function( obj ) {
        return $.type(obj) === "array";
    };


    /**
     * A crude way of determining if an object is a window.
     * Taken from jQuery 1.6.1
     * @function isWindow
     * @memberof OpenSeadragon
     * @see {@link http://www.jquery.com/ jQuery}
     */
    $.isWindow = function( obj ) {
        return obj && typeof obj === "object" && "setInterval" in obj;
    };


    /**
     * Taken from jQuery 1.6.1
     * @function type
     * @memberof OpenSeadragon
     * @see {@link http://www.jquery.com/ jQuery}
     */
    $.type = function( obj ) {
        return ( obj === null ) || ( obj === undefined ) ?
            String( obj ) :
            class2type[ toString.call(obj) ] || "object";
    };


    /**
     * Taken from jQuery 1.6.1
     * @function isPlainObject
     * @memberof OpenSeadragon
     * @see {@link http://www.jquery.com/ jQuery}
     */
    $.isPlainObject = function( obj ) {
        // Must be an Object.
        // Because of IE, we also have to check the presence of the constructor property.
        // Make sure that DOM nodes and window objects don't pass through, as well
        if ( !obj || OpenSeadragon.type(obj) !== "object" || obj.nodeType || $.isWindow( obj ) ) {
            return false;
        }

        // Not own constructor property must be Object
        if ( obj.constructor &&
            !hasOwn.call(obj, "constructor") &&
            !hasOwn.call(obj.constructor.prototype, "isPrototypeOf") ) {
            return false;
        }

        // Own properties are enumerated firstly, so to speed up,
        // if last one is own, then all properties are own.

        var key;
        for ( key in obj ) {}

        return key === undefined || hasOwn.call( obj, key );
    };


    /**
     * Taken from jQuery 1.6.1
     * @function isEmptyObject
     * @memberof OpenSeadragon
     * @see {@link http://www.jquery.com/ jQuery}
     */
    $.isEmptyObject = function( obj ) {
        for ( var name in obj ) {
            return false;
        }
        return true;
    };


    /**
     * True if the browser supports the HTML5 canvas element
     * @member {Boolean} supportsCanvas
     * @memberof OpenSeadragon
     */
    $.supportsCanvas = (function () {
        var canvasElement = document.createElement( 'canvas' );
        return !!( $.isFunction( canvasElement.getContext ) &&
                    canvasElement.getContext( '2d' ) );
    }());


}( OpenSeadragon ));

/**
 *  This closure defines all static methods available to the OpenSeadragon
 *  namespace.  Many, if not most, are taked directly from jQuery for use
 *  to simplify and reduce common programming patterns.  More static methods
 *  from jQuery may eventually make their way into this though we are
 *  attempting to avoid an explicit dependency on jQuery only because
 *  OpenSeadragon is a broadly useful code base and would be made less broad
 *  by requiring jQuery fully.
 *
 *  Some static methods have also been refactored from the original OpenSeadragon
 *  project.
 */
(function( $ ){

    /**
     * Taken from jQuery 1.6.1
     * @function extend
     * @memberof OpenSeadragon
     * @see {@link http://www.jquery.com/ jQuery}
     */
    $.extend = function() {
        var options,
            name,
            src,
            copy,
            copyIsArray,
            clone,
            target  = arguments[ 0 ] || {},
            length  = arguments.length,
            deep    = false,
            i       = 1;

        // Handle a deep copy situation
        if ( typeof target === "boolean" ) {
            deep    = target;
            target  = arguments[ 1 ] || {};
            // skip the boolean and the target
            i = 2;
        }

        // Handle case when target is a string or something (possible in deep copy)
        if ( typeof target !== "object" && !OpenSeadragon.isFunction( target ) ) {
            target = {};
        }

        // extend jQuery itself if only one argument is passed
        if ( length === i ) {
            target = this;
            --i;
        }

        for ( ; i < length; i++ ) {
            // Only deal with non-null/undefined values
            options = arguments[ i ];
            if ( options !== null || options !== undefined ) {
                // Extend the base object
                for ( name in options ) {
                    src = target[ name ];
                    copy = options[ name ];

                    // Prevent never-ending loop
                    if ( target === copy ) {
                        continue;
                    }

                    // Recurse if we're merging plain objects or arrays
                    if ( deep && copy && ( OpenSeadragon.isPlainObject( copy ) || ( copyIsArray = OpenSeadragon.isArray( copy ) ) ) ) {
                        if ( copyIsArray ) {
                            copyIsArray = false;
                            clone = src && OpenSeadragon.isArray( src ) ? src : [];

                        } else {
                            clone = src && OpenSeadragon.isPlainObject( src ) ? src : {};
                        }

                        // Never move original objects, clone them
                        target[ name ] = OpenSeadragon.extend( deep, clone, copy );

                    // Don't bring in undefined values
                    } else if ( copy !== undefined ) {
                        target[ name ] = copy;
                    }
                }
            }
        }

        // Return the modified object
        return target;
    };


    $.extend( $, /** @lends OpenSeadragon */{
        /**
         * The default values for the optional settings documented at {@link OpenSeadragon.Options}.
         * @static
         * @type {Object}
         */
        DEFAULT_SETTINGS: {
            //DATA SOURCE DETAILS
            xmlPath:                null,
            tileSources:            null,
            tileHost:               null,
            initialPage:            0,
            crossOriginPolicy:      false,

            //PAN AND ZOOM SETTINGS AND CONSTRAINTS
            panHorizontal:          true,
            panVertical:            true,
            constrainDuringPan:     false,
            wrapHorizontal:         false,
            wrapVertical:           false,
            visibilityRatio:        0.5, //-> how much of the viewer can be negative space
            minPixelRatio:          0.5, //->closer to 0 draws tiles meant for a higher zoom at this zoom
            defaultZoomLevel:       0,
            minZoomLevel:           null,
            maxZoomLevel:           null,

            //UI RESPONSIVENESS AND FEEL
            springStiffness:        7.0,
            clickTimeThreshold:     300,
            clickDistThreshold:     5,
            zoomPerClick:           2,
            zoomPerScroll:          1.2,
            zoomPerSecond:          1.0,
            animationTime:          1.2,
            blendTime:              0,
            alwaysBlend:            false,
            autoHideControls:       true,
            immediateRender:        false,
            minZoomImageRatio:      0.9, //-> closer to 0 allows zoom out to infinity
            maxZoomPixelRatio:      1.1, //-> higher allows 'over zoom' into pixels
            pixelsPerWheelLine:     40,
            autoResize:             true,

            //DEFAULT CONTROL SETTINGS
            showSequenceControl:     true,  //SEQUENCE
            sequenceControlAnchor:   null,  //SEQUENCE
            preserveViewport:        false, //SEQUENCE
            navPrevNextWrap:         false, //SEQUENCE
            showNavigationControl:   true,  //ZOOM/HOME/FULL/ROTATION
            navigationControlAnchor: null,  //ZOOM/HOME/FULL/ROTATION
            showZoomControl:         true,  //ZOOM
            showHomeControl:         true,  //HOME
            showFullPageControl:     true,  //FULL
            showRotationControl:     false, //ROTATION
            controlsFadeDelay:       2000,  //ZOOM/HOME/FULL/SEQUENCE
            controlsFadeLength:      1500,  //ZOOM/HOME/FULL/SEQUENCE
            mouseNavEnabled:         true,  //GENERAL MOUSE INTERACTIVITY

            //VIEWPORT NAVIGATOR SETTINGS
            showNavigator:              false,
            navigatorId:                null,
            navigatorPosition:          null,
            navigatorSizeRatio:         0.2,
            navigatorMaintainSizeRatio: false,
            navigatorTop:               null,
            navigatorLeft:              null,
            navigatorHeight:            null,
            navigatorWidth:             null,
            navigatorAutoResize:        true,

            // INITIAL ROTATION
            degrees:                0,

            // APPEARANCE
            opacity:                1,

            // LAYERS SETTINGS
            layersAspectRatioEpsilon:   0.0001,

            //REFERENCE STRIP SETTINGS
            showReferenceStrip:             false,
            referenceStripScroll:           'horizontal',
            referenceStripElement:          null,
            referenceStripHeight:           null,
            referenceStripWidth:            null,
            referenceStripPosition:         'BOTTOM_LEFT',
            referenceStripSizeRatio:        0.2,
            referenceStripBackgroundColor:  '#000',

            //COLLECTION VISUALIZATION SETTINGS
            collectionRows:         3, //or columns depending on layout
            collectionLayout:       'horizontal', //vertical
            collectionMode:         false,
            collectionTileSize:     800,

            //PERFORMANCE SETTINGS
            imageLoaderLimit:       0,
            maxImageCacheCount:     200,
            timeout:                30000,
            useCanvas:              true,  // Use canvas element for drawing if available

            //INTERFACE RESOURCE SETTINGS
            prefixUrl:              "/images/",
            navImages: {
                zoomIn: {
                    REST:   'zoomin_rest.png',
                    GROUP:  'zoomin_grouphover.png',
                    HOVER:  'zoomin_hover.png',
                    DOWN:   'zoomin_pressed.png'
                },
                zoomOut: {
                    REST:   'zoomout_rest.png',
                    GROUP:  'zoomout_grouphover.png',
                    HOVER:  'zoomout_hover.png',
                    DOWN:   'zoomout_pressed.png'
                },
                home: {
                    REST:   'home_rest.png',
                    GROUP:  'home_grouphover.png',
                    HOVER:  'home_hover.png',
                    DOWN:   'home_pressed.png'
                },
                fullpage: {
                    REST:   'fullpage_rest.png',
                    GROUP:  'fullpage_grouphover.png',
                    HOVER:  'fullpage_hover.png',
                    DOWN:   'fullpage_pressed.png'
                },
                rotateleft: {
                    REST:   'rotateleft_rest.png',
                    GROUP:  'rotateleft_grouphover.png',
                    HOVER:  'rotateleft_hover.png',
                    DOWN:   'rotateleft_pressed.png'
                },
                rotateright: {
                    REST:   'rotateright_rest.png',
                    GROUP:  'rotateright_grouphover.png',
                    HOVER:  'rotateright_hover.png',
                    DOWN:   'rotateright_pressed.png'
                },
                previous: {
                    REST:   'previous_rest.png',
                    GROUP:  'previous_grouphover.png',
                    HOVER:  'previous_hover.png',
                    DOWN:   'previous_pressed.png'
                },
                next: {
                    REST:   'next_rest.png',
                    GROUP:  'next_grouphover.png',
                    HOVER:  'next_hover.png',
                    DOWN:   'next_pressed.png'
                }
            },

            //DEVELOPER SETTINGS
            debugMode:              false,
            debugGridColor:         '#437AB2'
        },


        /**
         * TODO: get rid of this.  I can't see how it's required at all.  Looks
         *       like an early legacy code artifact.
         * @static
         * @ignore
         */
        SIGNAL: "----seadragon----",


        /**
         * Returns a function which invokes the method as if it were a method belonging to the object.
         * @function
         * @param {Object} object
         * @param {Function} method
         * @returns {Function}
         */
        delegate: function( object, method ) {
            return function(){
                var args = arguments;
                if ( args === undefined ){
                    args = [];
                }
                return method.apply( object, args );
            };
        },


        /**
         * An enumeration of Browser vendors.
         * @static
         * @type {Object}
         * @property {Number} UNKNOWN
         * @property {Number} IE
         * @property {Number} FIREFOX
         * @property {Number} SAFARI
         * @property {Number} CHROME
         * @property {Number} OPERA
         */
        BROWSERS: {
            UNKNOWN:    0,
            IE:         1,
            FIREFOX:    2,
            SAFARI:     3,
            CHROME:     4,
            OPERA:      5
        },


        /**
         * Returns a DOM Element for the given id or element.
         * @function
         * @param {String|Element} element Accepts an id or element.
         * @returns {Element} The element with the given id, null, or the element itself.
         */
        getElement: function( element ) {
            if ( typeof ( element ) == "string" ) {
                element = document.getElementById( element );
            }
            return element;
        },


        /**
         * Determines the position of the upper-left corner of the element.
         * @function
         * @param {Element|String} element - the elemenet we want the position for.
         * @returns {OpenSeadragon.Point} - the position of the upper left corner of the element.
         */
        getElementPosition: function( element ) {
            var result = new $.Point(),
                isFixed,
                offsetParent;

            element      = $.getElement( element );
            isFixed      = $.getElementStyle( element ).position == "fixed";
            offsetParent = getOffsetParent( element, isFixed );

            while ( offsetParent ) {

                result.x += element.offsetLeft;
                result.y += element.offsetTop;

                if ( isFixed ) {
                    result = result.plus( $.getPageScroll() );
                }

                element = offsetParent;
                isFixed = $.getElementStyle( element ).position == "fixed";
                offsetParent = getOffsetParent( element, isFixed );
            }

            return result;
        },


        /**
         * Determines the position of the upper-left corner of the element adjusted for current page and/or element scroll.
         * @function
         * @param {Element|String} element - the element we want the position for.
         * @returns {OpenSeadragon.Point} - the position of the upper left corner of the element adjusted for current page and/or element scroll.
         */
        getElementOffset: function( element ) {
            element = $.getElement( element );

            var doc = element && element.ownerDocument,
                docElement,
                win,
                boundingRect = { top: 0, left: 0 };

            if ( !doc ) {
                return new $.Point();
            }

            docElement = doc.documentElement;

            if ( typeof element.getBoundingClientRect !== typeof undefined ) {
                boundingRect = element.getBoundingClientRect();
            }

            win = ( doc == doc.window ) ?
                doc :
                ( doc.nodeType === 9 ) ?
                    doc.defaultView || doc.parentWindow :
                    false;

            return new $.Point(
                boundingRect.left + ( win.pageXOffset || docElement.scrollLeft ) - ( docElement.clientLeft || 0 ),
                boundingRect.top + ( win.pageYOffset || docElement.scrollTop ) - ( docElement.clientTop || 0 )
            );
        },


        /**
         * Determines the height and width of the given element.
         * @function
         * @param {Element|String} element
         * @returns {OpenSeadragon.Point}
         */
        getElementSize: function( element ) {
            element = $.getElement( element );

            return new $.Point(
                element.clientWidth,
                element.clientHeight
            );
        },


        /**
         * Returns the CSSStyle object for the given element.
         * @function
         * @param {Element|String} element
         * @returns {CSSStyle}
         */
        getElementStyle:
            document.documentElement.currentStyle ?
            function( element ) {
                element = $.getElement( element );
                return element.currentStyle;
            } :
            function( element ) {
                element = $.getElement( element );
                return window.getComputedStyle( element, "" );
            },


        /**
         * Gets the latest event, really only useful internally since its
         * specific to IE behavior.
         * @function
         * @param {Event} [event]
         * @returns {Event}
         * @deprecated For internal use only
         * @private
         */
        getEvent: function( event ) {
            if( event ){
                $.getEvent = function( event ) {
                    return event;
                };
            } else {
                $.getEvent = function() {
                    return window.event;
                };
            }
            return $.getEvent( event );
        },


        /**
         * Gets the position of the mouse on the screen for a given event.
         * @function
         * @param {Event} [event]
         * @returns {OpenSeadragon.Point}
         */
        getMousePosition: function( event ) {

            if ( typeof( event.pageX ) == "number" ) {
                $.getMousePosition = function( event ){
                    var result = new $.Point();

                    event = $.getEvent( event );
                    result.x = event.pageX;
                    result.y = event.pageY;

                    return result;
                };
            } else if ( typeof( event.clientX ) == "number" ) {
                $.getMousePosition = function( event ){
                    var result = new $.Point();

                    event = $.getEvent( event );
                    result.x =
                        event.clientX +
                        document.body.scrollLeft +
                        document.documentElement.scrollLeft;
                    result.y =
                        event.clientY +
                        document.body.scrollTop +
                        document.documentElement.scrollTop;

                    return result;
                };
            } else {
                throw new Error(
                    "Unknown event mouse position, no known technique."
                );
            }

            return $.getMousePosition( event );
        },


        /**
         * Determines the page's current scroll position.
         * @function
         * @returns {OpenSeadragon.Point}
         */
        getPageScroll: function() {
            var docElement  = document.documentElement || {},
                body        = document.body || {};

            if ( typeof( window.pageXOffset ) == "number" ) {
                $.getPageScroll = function(){
                    return new $.Point(
                        window.pageXOffset,
                        window.pageYOffset
                    );
                };
            } else if ( body.scrollLeft || body.scrollTop ) {
                $.getPageScroll = function(){
                    return new $.Point(
                        document.body.scrollLeft,
                        document.body.scrollTop
                    );
                };
            } else if ( docElement.scrollLeft || docElement.scrollTop ) {
                $.getPageScroll = function(){
                    return new $.Point(
                        document.documentElement.scrollLeft,
                        document.documentElement.scrollTop
                    );
                };
            } else {
                // We can't reassign the function yet, as there was no scroll.
                return new $.Point(0,0);
            }

            return $.getPageScroll();
        },

        /**
         * Set the page scroll position.
         * @function
         * @returns {OpenSeadragon.Point}
         */
        setPageScroll: function( scroll ) {
            if ( typeof ( window.scrollTo ) !== "undefined" ) {
                $.setPageScroll = function( scroll ) {
                    window.scrollTo( scroll.x, scroll.y );
                };
            } else {
                var originalScroll = $.getPageScroll();
                if ( originalScroll.x === scroll.x &&
                    originalScroll.y === scroll.y ) {
                    // We are already correctly positioned and there
                    // is no way to detect the correct method.
                    return;
                }

                document.body.scrollLeft = scroll.x;
                document.body.scrollTop = scroll.y;
                var currentScroll = $.getPageScroll();
                if ( currentScroll.x !== originalScroll.x &&
                    currentScroll.y !== originalScroll.y ) {
                    $.setPageScroll = function( scroll ) {
                        document.body.scrollLeft = scroll.x;
                        document.body.scrollTop = scroll.y;
                    };
                    return;
                }

                document.documentElement.scrollLeft = scroll.x;
                document.documentElement.scrollTop = scroll.y;
                currentScroll = $.getPageScroll();
                if ( currentScroll.x !== originalScroll.x &&
                    currentScroll.y !== originalScroll.y ) {
                    $.setPageScroll = function( scroll ) {
                        document.documentElement.scrollLeft = scroll.x;
                        document.documentElement.scrollTop = scroll.y;
                    };
                    return;
                }

                // We can't find anything working, so we do nothing.
                $.setPageScroll = function( scroll ) {
                };
            }

            return $.setPageScroll( scroll );
        },

        /**
         * Determines the size of the browsers window.
         * @function
         * @returns {OpenSeadragon.Point}
         */
        getWindowSize: function() {
            var docElement = document.documentElement || {},
                body    = document.body || {};

            if ( typeof( window.innerWidth ) == 'number' ) {
                $.getWindowSize = function(){
                    return new $.Point(
                        window.innerWidth,
                        window.innerHeight
                    );
                };
            } else if ( docElement.clientWidth || docElement.clientHeight ) {
                $.getWindowSize = function(){
                    return new $.Point(
                        document.documentElement.clientWidth,
                        document.documentElement.clientHeight
                    );
                };
            } else if ( body.clientWidth || body.clientHeight ) {
                $.getWindowSize = function(){
                    return new $.Point(
                        document.body.clientWidth,
                        document.body.clientHeight
                    );
                };
            } else {
                throw new Error("Unknown window size, no known technique.");
            }

            return $.getWindowSize();
        },


        /**
         * Wraps the given element in a nest of divs so that the element can
         * be easily centered using CSS tables
         * @function
         * @param {Element|String} element
         * @returns {Element} outermost wrapper element
         */
        makeCenteredNode: function( element ) {
            // Convert a possible ID to an actual HTMLElement
            element = $.getElement( element );

            /*
                CSS tables require you to have a display:table/row/cell hierarchy so we need to create
                three nested wrapper divs:
             */

            var wrappers = [
                $.makeNeutralElement( 'div' ),
                $.makeNeutralElement( 'div' ),
                $.makeNeutralElement( 'div' )
            ];

            // It feels like we should be able to pass style dicts to makeNeutralElement:
            $.extend(wrappers[0].style, {
                display: "table",
                height: "100%",
                width: "100%"
            });

            $.extend(wrappers[1].style, {
                display: "table-row"
            });

            $.extend(wrappers[2].style, {
                display: "table-cell",
                verticalAlign: "middle",
                textAlign: "center"
            });

            wrappers[0].appendChild(wrappers[1]);
            wrappers[1].appendChild(wrappers[2]);
            wrappers[2].appendChild(element);

            return wrappers[0];
        },


        /**
         * Creates an easily positionable element of the given type that therefor
         * serves as an excellent container element.
         * @function
         * @param {String} tagName
         * @returns {Element}
         */
        makeNeutralElement: function( tagName ) {
            var element = document.createElement( tagName ),
                style   = element.style;

            style.background = "transparent none";
            style.border     = "none";
            style.margin     = "0px";
            style.padding    = "0px";
            style.position   = "static";

            return element;
        },


        /**
         * Returns the current milliseconds, using Date.now() if available
         * @function
         */
        now: function( ) {
          if (Date.now) {
            $.now = Date.now;
          } else {
            $.now = function() { return new Date().getTime(); };
          }

          return $.now();
        },


        /**
         * Ensures an image is loaded correctly to support alpha transparency.
         * Generally only IE has issues doing this correctly for formats like
         * png.
         * @function
         * @param {String} src
         * @returns {Element}
         */
        makeTransparentImage: function( src ) {

            $.makeTransparentImage = function( src ){
                var img = $.makeNeutralElement( "img" );

                img.src = src;

                return img;
            };

            if ( $.Browser.vendor == $.BROWSERS.IE && $.Browser.version < 7 ) {

                $.makeTransparentImage = function( src ){
                    var img     = $.makeNeutralElement( "img" ),
                        element = null;

                    element = $.makeNeutralElement("span");
                    element.style.display = "inline-block";

                    img.onload = function() {
                        element.style.width  = element.style.width || img.width + "px";
                        element.style.height = element.style.height || img.height + "px";

                        img.onload = null;
                        img = null;     // to prevent memory leaks in IE
                    };

                    img.src = src;
                    element.style.filter =
                        "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" +
                        src +
                        "', sizingMethod='scale')";

                    return element;
                };

            }

            return $.makeTransparentImage( src );
        },


        /**
         * Sets the opacity of the specified element.
         * @function
         * @param {Element|String} element
         * @param {Number} opacity
         * @param {Boolean} [usesAlpha]
         */
        setElementOpacity: function( element, opacity, usesAlpha ) {

            var ieOpacity,
                ieFilter;

            element = $.getElement( element );

            if ( usesAlpha && !$.Browser.alpha ) {
                opacity = Math.round( opacity );
            }

            if ( $.Browser.opacity ) {
                element.style.opacity = opacity < 1 ? opacity : "";
            } else {
                if ( opacity < 1 ) {
                    ieOpacity = Math.round( 100 * opacity );
                    ieFilter  = "alpha(opacity=" + ieOpacity + ")";
                    element.style.filter = ieFilter;
                } else {
                    element.style.filter = "";
                }
            }
        },


        /**
         * Add the specified CSS class to the element if not present.
         * @function
         * @param {Element|String} element
         * @param {String} className
         */
        addClass: function( element, className ) {
            element = $.getElement( element );

            if ( ! element.className ) {
                element.className = className;
            } else if ( ( ' ' + element.className + ' ' ).
                indexOf( ' ' + className + ' ' ) === -1 ) {
                element.className += ' ' + className;
            }
        },

        /**
         * Find the first index at which an element is found in an array or -1
         * if not present.
         *
         * Code taken and adapted from
         * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf#Compatibility
         *
         * @function
         * @param {Array} array The array from which to find the element
         * @param {Object} searchElement The element to find
         * @param {Number} [fromIndex=0] Index to start research.
         * @returns {Number} The index of the element in the array.
         */
        indexOf: function( array, searchElement, fromIndex ) {
            if ( Array.prototype.indexOf ) {
                this.indexOf = function( array, searchElement, fromIndex ) {
                    return array.indexOf( searchElement, fromIndex );
                };
            } else {
                this.indexOf = function( array, searchElement, fromIndex ) {
                    var i,
                        pivot = ( fromIndex ) ? fromIndex : 0,
                        length;
                    if ( !array ) {
                        throw new TypeError( );
                    }

                    length = array.length;
                    if ( length === 0 || pivot >= length ) {
                        return -1;
                    }

                    if ( pivot < 0 ) {
                        pivot = length - Math.abs( pivot );
                    }

                    for ( i = pivot; i < length; i++ ) {
                        if ( array[i] === searchElement ) {
                            return i;
                        }
                    }
                    return -1;
                };
            }
            return this.indexOf( array, searchElement, fromIndex );
        },

        /**
         * Remove the specified CSS class from the element.
         * @function
         * @param {Element|String} element
         * @param {String} className
         */
        removeClass: function( element, className ) {
            var oldClasses,
                newClasses = [],
                i;

            element = $.getElement( element );
            oldClasses = element.className.split( /\s+/ );
            for ( i = 0; i < oldClasses.length; i++ ) {
                if ( oldClasses[ i ] && oldClasses[ i ] !== className ) {
                    newClasses.push( oldClasses[ i ] );
                }
            }
            element.className = newClasses.join(' ');
        },


        /**
         * Adds an event listener for the given element, eventName and handler.
         * @function
         * @param {Element|String} element
         * @param {String} eventName
         * @param {Function} handler
         * @param {Boolean} [useCapture]
         */
        addEvent: (function () {
            if ( window.addEventListener ) {
                return function ( element, eventName, handler, useCapture ) {
                    element = $.getElement( element );
                    element.addEventListener( eventName, handler, useCapture );
                };
            } else if ( window.attachEvent ) {
                return function ( element, eventName, handler, useCapture ) {
                    element = $.getElement( element );
                    element.attachEvent( 'on' + eventName, handler );
                    if ( useCapture && element.setCapture ) {
                        element.setCapture();
                    }
                };
            } else {
                throw new Error( "No known event model." );
            }
        }()),


        /**
         * Remove a given event listener for the given element, event type and
         * handler.
         * @function
         * @param {Element|String} element
         * @param {String} eventName
         * @param {Function} handler
         * @param {Boolean} [useCapture]
         */
        removeEvent: (function () {
            if ( window.removeEventListener ) {
                return function ( element, eventName, handler, useCapture ) {
                    element = $.getElement( element );
                    element.removeEventListener( eventName, handler, useCapture );
                };
            } else if ( window.detachEvent ) {
                return function( element, eventName, handler, useCapture ) {
                    element = $.getElement( element );
                    element.detachEvent( 'on' + eventName, handler );
                    if ( useCapture && element.releaseCapture ) {
                        element.releaseCapture();
                    }
                };
            } else {
                throw new Error( "No known event model." );
            }
        }()),


        /**
         * Cancels the default browser behavior had the event propagated all
         * the way up the DOM to the window object.
         * @function
         * @param {Event} [event]
         */
        cancelEvent: function( event ) {
            event = $.getEvent( event );

            if ( event.preventDefault ) {
                $.cancelEvent = function( event ){
                    // W3C for preventing default
                    event.preventDefault();
                };
            } else {
                $.cancelEvent = function( event ){
                    event = $.getEvent( event );
                    // legacy for preventing default
                    event.cancel = true;
                    // IE for preventing default
                    event.returnValue = false;
                };
            }
            $.cancelEvent( event );
        },


        /**
         * Stops the propagation of the event up the DOM.
         * @function
         * @param {Event} [event]
         */
        stopEvent: function( event ) {
            event = $.getEvent( event );

            if ( event.stopPropagation ) {
                // W3C for stopping propagation
                $.stopEvent = function( event ){
                    event.stopPropagation();
                };
            } else {
                // IE for stopping propagation
                $.stopEvent = function( event ){
                    event = $.getEvent( event );
                    event.cancelBubble = true;
                };

            }

            $.stopEvent( event );
        },


        /**
         * Similar to OpenSeadragon.delegate, but it does not immediately call
         * the method on the object, returning a function which can be called
         * repeatedly to delegate the method. It also allows additonal arguments
         * to be passed during construction which will be added during each
         * invocation, and each invocation can add additional arguments as well.
         *
         * @function
         * @param {Object} object
         * @param {Function} method
         * @param [args] any additional arguments are passed as arguments to the
         *  created callback
         * @returns {Function}
         */
        createCallback: function( object, method ) {
            //TODO: This pattern is painful to use and debug.  It's much cleaner
            //      to use pinning plus anonymous functions.  Get rid of this
            //      pattern!
            var initialArgs = [],
                i;
            for ( i = 2; i < arguments.length; i++ ) {
                initialArgs.push( arguments[ i ] );
            }

            return function() {
                var args = initialArgs.concat( [] ),
                    i;
                for ( i = 0; i < arguments.length; i++ ) {
                    args.push( arguments[ i ] );
                }

                return method.apply( object, args );
            };
        },


        /**
         * Retreives the value of a url parameter from the window.location string.
         * @function
         * @param {String} key
         * @returns {String} The value of the url parameter or null if no param matches.
         */
        getUrlParameter: function( key ) {
            var value = URLPARAMS[ key ];
            return value ? value : null;
        },


        createAjaxRequest: function(){
            var request;

            if ( window.XMLHttpRequest ) {
                $.createAjaxRequest = function( ){
                    return new XMLHttpRequest();
                };
                request = new XMLHttpRequest();
            } else if ( window.ActiveXObject ) {
                /*jshint loopfunc:true*/
                /* global ActiveXObject:true */
                for ( var i = 0; i < ACTIVEX.length; i++ ) {
                    try {
                        request = new ActiveXObject( ACTIVEX[ i ] );
                        $.createAjaxRequest = function( ){
                            return new ActiveXObject( ACTIVEX[ i ] );
                        };
                        break;
                    } catch (e) {
                        continue;
                    }
                }
            }

            if ( !request ) {
                throw new Error( "Browser doesn't support XMLHttpRequest." );
            }

            return request;
        },


        /**
         * Makes an AJAX request.
         * @function
         * @param {String} url - the url to request
         * @param {Function} onSuccess - a function to call on a successful response
         * @param {Function} onError - a function to call on when an error occurs
         * @throws {Error}
         */
        makeAjaxRequest: function( url, onSuccess, onError ) {
            var request = $.createAjaxRequest();

            if ( !$.isFunction( onSuccess ) ) {
                throw new Error( "makeAjaxRequest requires a success callback" );
            }

            request.onreadystatechange = function() {
                // 4 = DONE (https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest#Properties)
                if ( request.readyState == 4 ) {
                    request.onreadystatechange = function(){};

                    if ( request.status == 200 ) {
                        onSuccess( request );
                    } else {
                        $.console.log( "AJAX request returned %s: %s", request.status, url );

                        if ( $.isFunction( onError ) ) {
                            onError( request );
                        }
                    }
                }
            };

            try {
                request.open( "GET", url, true );
                request.send( null );
            } catch (e) {
                var msg = e.message;

                /*
                    IE < 10 does not support CORS and an XHR request to a different origin will fail as soon
                    as send() is called. This is particularly easy to miss during development and appear in
                    production if you use a CDN or domain sharding and the security policy is likely to break
                    exception handlers since any attempt to access a property of the request object will
                    raise an access denied TypeError inside the catch block.

                    To be friendlier, we'll check for this specific error and add a documentation pointer
                    to point developers in the right direction. We test the exception number because IE's
                    error messages are localized.
                */
                var oldIE = $.Browser.vendor == $.BROWSERS.IE && $.Browser.version < 10;
                if ( oldIE && typeof( e.number ) != "undefined" && e.number == -2147024891 ) {
                    msg += "\nSee http://msdn.microsoft.com/en-us/library/ms537505(v=vs.85).aspx#xdomain";
                }

                $.console.log( "%s while making AJAX request: %s", e.name, msg );

                request.onreadystatechange = function(){};

                if ( $.isFunction( onError ) ) {
                    onError( request, e );
                }
            }
        },

        /**
         * Taken from jQuery 1.6.1
         * @function
         * @param {Object} options
         * @param {String} options.url
         * @param {Function} options.callback
         * @param {String} [options.param='callback'] The name of the url parameter
         *      to request the jsonp provider with.
         * @param {String} [options.callbackName=] The name of the callback to
         *      request the jsonp provider with.
         */
        jsonp: function( options ){
            var script,
                url     = options.url,
                head    = document.head ||
                    document.getElementsByTagName( "head" )[ 0 ] ||
                    document.documentElement,
                jsonpCallback = options.callbackName || 'openseadragon' + $.now(),
                previous      = window[ jsonpCallback ],
                replace       = "$1" + jsonpCallback + "$2",
                callbackParam = options.param || 'callback',
                callback      = options.callback;

            url = url.replace( /(\=)\?(&|$)|\?\?/i, replace );
            // Add callback manually
            url += (/\?/.test( url ) ? "&" : "?") + callbackParam + "=" + jsonpCallback;

            // Install callback
            window[ jsonpCallback ] = function( response ) {
                if ( !previous ){
                    try{
                        delete window[ jsonpCallback ];
                    }catch(e){
                        //swallow
                    }
                } else {
                    window[ jsonpCallback ] = previous;
                }
                if( callback && $.isFunction( callback ) ){
                    callback( response );
                }
            };

            script = document.createElement( "script" );

            //TODO: having an issue with async info requests
            if( undefined !== options.async || false !== options.async ){
                script.async = "async";
            }

            if ( options.scriptCharset ) {
                script.charset = options.scriptCharset;
            }

            script.src = url;

            // Attach handlers for all browsers
            script.onload = script.onreadystatechange = function( _, isAbort ) {

                if ( isAbort || !script.readyState || /loaded|complete/.test( script.readyState ) ) {

                    // Handle memory leak in IE
                    script.onload = script.onreadystatechange = null;

                    // Remove the script
                    if ( head && script.parentNode ) {
                        head.removeChild( script );
                    }

                    // Dereference the script
                    script = undefined;
                }
            };
            // Use insertBefore instead of appendChild  to circumvent an IE6 bug.
            // This arises when a base node is used (#2709 and #4378).
            head.insertBefore( script, head.firstChild );

        },


        /**
         * Fully deprecated. Will throw an error.
         * @function
         * @deprecated use {@link OpenSeadragon.Viewer#open}
         */
        createFromDZI: function() {
            throw "OpenSeadragon.createFromDZI is deprecated, use Viewer.open.";
        },

        /**
         * Parses an XML string into a DOM Document.
         * @function
         * @param {String} string
         * @returns {Document}
         */
        parseXml: function( string ) {
            //TODO: yet another example where we can determine the correct
            //      implementation once at start-up instead of everytime we use
            //      the function. DONE.
            if ( window.ActiveXObject ) {

                $.parseXml = function( string ){
                    var xmlDoc = null;

                    xmlDoc = new ActiveXObject( "Microsoft.XMLDOM" );
                    xmlDoc.async = false;
                    xmlDoc.loadXML( string );
                    return xmlDoc;
                };

            } else if ( window.DOMParser ) {

                $.parseXml = function( string ){
                    var xmlDoc = null,
                        parser;

                    parser = new DOMParser();
                    xmlDoc = parser.parseFromString( string, "text/xml" );
                    return xmlDoc;
                };

            } else {
                throw new Error( "Browser doesn't support XML DOM." );
            }

            return $.parseXml( string );
        },


        /**
         * Reports whether the image format is supported for tiling in this
         * version.
         * @function
         * @param {String} [extension]
         * @returns {Boolean}
         */
        imageFormatSupported: function( extension ) {
            extension = extension ? extension : "";
            return !!FILEFORMATS[ extension.toLowerCase() ];
        }

    });


    /**
     * The current browser vendor, version, and related information regarding detected features.
     * @member {Object} Browser
     * @memberof OpenSeadragon
     * @static
     * @type {Object}
     * @property {OpenSeadragon.BROWSERS} vendor - One of the {@link OpenSeadragon.BROWSERS} enumeration values.
     * @property {Number} version
     * @property {Boolean} alpha - Does the browser support image alpha transparency.
     */
    $.Browser = {
        vendor:     $.BROWSERS.UNKNOWN,
        version:    0,
        alpha:      true
    };


    var ACTIVEX = [
            "Msxml2.XMLHTTP",
            "Msxml3.XMLHTTP",
            "Microsoft.XMLHTTP"
        ],
        FILEFORMATS = {
            "bmp":  false,
            "jpeg": true,
            "jpg":  true,
            "png":  true,
            "tif":  false,
            "wdp":  false
        },
        URLPARAMS = {};

    (function() {
        //A small auto-executing routine to determine the browser vendor,
        //version and supporting feature sets.
        var app = navigator.appName,
            ver = navigator.appVersion,
            ua  = navigator.userAgent;

        //console.error( 'appName: ' + navigator.appName );
        //console.error( 'appVersion: ' + navigator.appVersion );
        //console.error( 'userAgent: ' + navigator.userAgent );

        switch( navigator.appName ){
            case "Microsoft Internet Explorer":
                if( !!window.attachEvent &&
                    !!window.ActiveXObject ) {

                    $.Browser.vendor = $.BROWSERS.IE;
                    $.Browser.version = parseFloat(
                        ua.substring(
                            ua.indexOf( "MSIE" ) + 5,
                            ua.indexOf( ";", ua.indexOf( "MSIE" ) ) )
                        );
                }
                break;
            case "Netscape":
                if( !!window.addEventListener ){
                    if ( ua.indexOf( "Firefox" ) >= 0 ) {
                        $.Browser.vendor = $.BROWSERS.FIREFOX;
                        $.Browser.version = parseFloat(
                            ua.substring( ua.indexOf( "Firefox" ) + 8 )
                        );
                    } else if ( ua.indexOf( "Safari" ) >= 0 ) {
                        $.Browser.vendor = ua.indexOf( "Chrome" ) >= 0 ?
                            $.BROWSERS.CHROME :
                            $.BROWSERS.SAFARI;
                        $.Browser.version = parseFloat(
                            ua.substring(
                                ua.substring( 0, ua.indexOf( "Safari" ) ).lastIndexOf( "/" ) + 1,
                                ua.indexOf( "Safari" )
                            )
                        );
                    }
                }
                break;
            case "Opera":
                $.Browser.vendor = $.BROWSERS.OPERA;
                $.Browser.version = parseFloat( ver );
                break;
        }

            // ignore '?' portion of query string
        var query = window.location.search.substring( 1 ),
            parts = query.split('&'),
            part,
            sep,
            i;

        for ( i = 0; i < parts.length; i++ ) {
            part = parts[ i ];
            sep  = part.indexOf( '=' );

            if ( sep > 0 ) {
                URLPARAMS[ part.substring( 0, sep ) ] =
                    decodeURIComponent( part.substring( sep + 1 ) );
            }
        }

        //determine if this browser supports image alpha transparency
        $.Browser.alpha = !(
            (
                $.Browser.vendor == $.BROWSERS.IE &&
                $.Browser.version < 9
            ) || (
                $.Browser.vendor == $.BROWSERS.CHROME &&
                $.Browser.version < 2
            )
        );

        //determine if this browser supports element.style.opacity
        $.Browser.opacity = !(
            $.Browser.vendor == $.BROWSERS.IE &&
            $.Browser.version < 9
        );

    })();


    //TODO: $.console is often used inside a try/catch block which generally
    //      prevents allowings errors to occur with detection until a debugger
    //      is attached.  Although I've been guilty of the same anti-pattern
    //      I eventually was convinced that errors should naturally propogate in
    //      all but the most special cases.
    /**
     * A convenient alias for console when available, and a simple null
     * function when console is unavailable.
     * @static
     * @private
     */
    var nullfunction = function( msg ){
            //document.location.hash = msg;
        };

    $.console = window.console || {
        log:    nullfunction,
        debug:  nullfunction,
        info:   nullfunction,
        warn:   nullfunction,
        error:  nullfunction
    };


    // Adding support for HTML5's requestAnimationFrame as suggested by acdha.
    // Implementation taken from matt synder's post here:
    // http://mattsnider.com/cross-browser-and-legacy-supported-requestframeanimation/
    (function( w ) {

        // most browsers have an implementation
        var requestAnimationFrame = w.requestAnimationFrame ||
            w.mozRequestAnimationFrame ||
            w.webkitRequestAnimationFrame ||
            w.msRequestAnimationFrame;

        var cancelAnimationFrame = w.cancelAnimationFrame ||
            w.mozCancelAnimationFrame ||
            w.webkitCancelAnimationFrame ||
            w.msCancelAnimationFrame;

        // polyfill, when necessary
        if ( requestAnimationFrame && cancelAnimationFrame ) {
            // We can't assign these window methods directly to $ because they
            // expect their "this" to be "window", so we call them in wrappers.
            $.requestAnimationFrame = function(){
                return requestAnimationFrame.apply( w, arguments );
            };
            $.cancelAnimationFrame = function(){
                return cancelAnimationFrame.apply( w, arguments );
            };
        } else {
            var aAnimQueue = [],
                processing = [],
                iRequestId = 0,
                iIntervalId;

            // create a mock requestAnimationFrame function
            $.requestAnimationFrame = function( callback ) {
                aAnimQueue.push( [ ++iRequestId, callback ] );

                if ( !iIntervalId ) {
                    iIntervalId = setInterval( function() {
                        if ( aAnimQueue.length ) {
                            var time = $.now();
                            // Process all of the currently outstanding frame
                            // requests, but none that get added during the
                            // processing.
                            // Swap the arrays so we don't have to create a new
                            // array every frame.
                            var temp = processing;
                            processing = aAnimQueue;
                            aAnimQueue = temp;
                            while ( processing.length ) {
                                processing.shift()[ 1 ]( time );
                            }
                        } else {
                            // don't continue the interval, if unnecessary
                            clearInterval( iIntervalId );
                            iIntervalId = undefined;
                        }
                    }, 1000 / 50);  // estimating support for 50 frames per second
                }

                return iRequestId;
            };

            // create a mock cancelAnimationFrame function
            $.cancelAnimationFrame = function( requestId ) {
                // find the request ID and remove it
                var i, j;
                for ( i = 0, j = aAnimQueue.length; i < j; i += 1 ) {
                    if ( aAnimQueue[ i ][ 0 ] === requestId ) {
                        aAnimQueue.splice( i, 1 );
                        return;
                    }
                }

                // If it's not in the queue, it may be in the set we're currently
                // processing (if cancelAnimationFrame is called from within a
                // requestAnimationFrame callback).
                for ( i = 0, j = processing.length; i < j; i += 1 ) {
                    if ( processing[ i ][ 0 ] === requestId ) {
                        processing.splice( i, 1 );
                        return;
                    }
                }
            };
        }
    })( window );

    /**
     * @private
     * @inner
     * @function
     * @param {Element} element
     * @param {Boolean} [isFixed]
     * @returns {Element}
     */
    function getOffsetParent( element, isFixed ) {
        if ( isFixed && element != document.body ) {
            return document.body;
        } else {
            return element.offsetParent;
        }
    }

    /**
     * @private
     * @inner
     * @function
     * @param {XMLHttpRequest} xhr
     * @param {String} tilesUrl
     * @deprecated
     */
    function processDZIResponse( xhr, tilesUrl ) {
        var status,
            statusText,
            doc = null;

        if ( !xhr ) {
            throw new Error( $.getString( "Errors.Security" ) );
        } else if ( xhr.status !== 200 && xhr.status !== 0 ) {
            status     = xhr.status;
            statusText = ( status == 404 ) ?
                "Not Found" :
                xhr.statusText;
            throw new Error( $.getString( "Errors.Status", status, statusText ) );
        }

        if ( xhr.responseXML && xhr.responseXML.documentElement ) {
            doc = xhr.responseXML;
        } else if ( xhr.responseText ) {
            doc = $.parseXml( xhr.responseText );
        }

        return processDZIXml( doc, tilesUrl );
    }

    /**
     * @private
     * @inner
     * @function
     * @param {Document} xmlDoc
     * @param {String} tilesUrl
     * @deprecated
     */
    function processDZIXml( xmlDoc, tilesUrl ) {

        if ( !xmlDoc || !xmlDoc.documentElement ) {
            throw new Error( $.getString( "Errors.Xml" ) );
        }

        var root     = xmlDoc.documentElement,
            rootName = root.tagName;

        if ( rootName == "Image" ) {
            try {
                return processDZI( root, tilesUrl );
            } catch ( e ) {
                throw (e instanceof Error) ?
                    e :
                    new Error( $.getString("Errors.Dzi") );
            }
        } else if ( rootName == "Collection" ) {
            throw new Error( $.getString( "Errors.Dzc" ) );
        } else if ( rootName == "Error" ) {
            return $._processDZIError( root );
        }

        throw new Error( $.getString( "Errors.Dzi" ) );
    }

    /**
     * @private
     * @inner
     * @function
     * @param {Element} imageNode
     * @param {String} tilesUrl
     * @deprecated
     */
    function processDZI( imageNode, tilesUrl ) {
        var fileFormat    = imageNode.getAttribute( "Format" ),
            sizeNode      = imageNode.getElementsByTagName( "Size" )[ 0 ],
            dispRectNodes = imageNode.getElementsByTagName( "DisplayRect" ),
            width         = parseInt( sizeNode.getAttribute( "Width" ), 10 ),
            height        = parseInt( sizeNode.getAttribute( "Height" ), 10 ),
            tileSize      = parseInt( imageNode.getAttribute( "TileSize" ), 10 ),
            tileOverlap   = parseInt( imageNode.getAttribute( "Overlap" ), 10 ),
            dispRects     = [],
            dispRectNode,
            rectNode,
            i;

        if ( !$.imageFormatSupported( fileFormat ) ) {
            throw new Error(
                $.getString( "Errors.ImageFormat", fileFormat.toUpperCase() )
            );
        }

        for ( i = 0; i < dispRectNodes.length; i++ ) {
            dispRectNode = dispRectNodes[ i ];
            rectNode     = dispRectNode.getElementsByTagName( "Rect" )[ 0 ];

            dispRects.push( new $.DisplayRect(
                parseInt( rectNode.getAttribute( "X" ), 10 ),
                parseInt( rectNode.getAttribute( "Y" ), 10 ),
                parseInt( rectNode.getAttribute( "Width" ), 10 ),
                parseInt( rectNode.getAttribute( "Height" ), 10 ),
                0,  // ignore MinLevel attribute, bug in Deep Zoom Composer
                parseInt( dispRectNode.getAttribute( "MaxLevel" ), 10 )
            ));
        }
        return new $.DziTileSource(
            width,
            height,
            tileSize,
            tileOverlap,
            tilesUrl,
            fileFormat,
            dispRects
        );
    }

    /**
     * @private
     * @inner
     * @function
     * @param {Element} imageNode
     * @param {String} tilesUrl
     * @deprecated
     */
    function processDZIJSON( imageData, tilesUrl ) {
        var fileFormat    = imageData.Format,
            sizeData      = imageData.Size,
            dispRectData  = imageData.DisplayRect || [],
            width         = parseInt( sizeData.Width, 10 ),
            height        = parseInt( sizeData.Height, 10 ),
            tileSize      = parseInt( imageData.TileSize, 10 ),
            tileOverlap   = parseInt( imageData.Overlap, 10 ),
            dispRects     = [],
            rectData,
            i;

        if ( !$.imageFormatSupported( fileFormat ) ) {
            throw new Error(
                $.getString( "Errors.ImageFormat", fileFormat.toUpperCase() )
            );
        }

        for ( i = 0; i < dispRectData.length; i++ ) {
            rectData     = dispRectData[ i ].Rect;

            dispRects.push( new $.DisplayRect(
                parseInt( rectData.X, 10 ),
                parseInt( rectData.Y, 10 ),
                parseInt( rectData.Width, 10 ),
                parseInt( rectData.Height, 10 ),
                0,  // ignore MinLevel attribute, bug in Deep Zoom Composer
                parseInt( rectData.MaxLevel, 10 )
            ));
        }
        return new $.DziTileSource(
            width,
            height,
            tileSize,
            tileOverlap,
            tilesUrl,
            fileFormat,
            dispRects
        );
    }

    /**
     * @private
     * @inner
     * @function
     * @param {Document} errorNode
     * @throws {Error}
     * @deprecated
     */
    $._processDZIError = function ( errorNode ) {
        var messageNode = errorNode.getElementsByTagName( "Message" )[ 0 ],
            message     = messageNode.firstChild.nodeValue;

        throw new Error(message);
    };

}( OpenSeadragon ));

/*
 * OpenSeadragon - full-screen support functions
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ) {
    /**
     * Determine native full screen support we can get from the browser.
     * @member fullScreenApi
     * @memberof OpenSeadragon
     * @type {object}
     * @property {Boolean} supportsFullScreen Return true if full screen API is supported.
     * @property {Function} isFullScreen Return true if currently in full screen mode.
     * @property {Function} getFullScreenElement Return the element currently in full screen mode.
     * @property {Function} requestFullScreen Make a request to go in full screen mode.
     * @property {Function} exitFullScreen Make a request to exit full screen mode.
     * @property {Function} cancelFullScreen Deprecated, use exitFullScreen instead.
     * @property {String} fullScreenEventName Event fired when the full screen mode change.
     * @property {String} fullScreenErrorEventName Event fired when a request to go
     * in full screen mode failed.
     */
    var fullScreenApi = {
        supportsFullScreen: false,
        isFullScreen: function() { return false; },
        getFullScreenElement: function() { return null; },
        requestFullScreen: function() {},
        exitFullScreen: function() {},
        cancelFullScreen: function() {},
        fullScreenEventName: '',
        fullScreenErrorEventName: ''
    };

    // check for native support
    if ( document.exitFullscreen ) {
        // W3C standard
        fullScreenApi.supportsFullScreen = true;
        fullScreenApi.getFullScreenElement = function() {
            return document.fullscreenElement;
        };
        fullScreenApi.requestFullScreen = function( element ) {
            return element.requestFullscreen();
        };
        fullScreenApi.exitFullScreen = function() {
            document.exitFullscreen();
        };
        fullScreenApi.fullScreenEventName = "fullscreenchange";
        fullScreenApi.fullScreenErrorEventName = "fullscreenerror";
    } else if ( document.msExitFullscreen ) {
        // IE 11
        fullScreenApi.supportsFullScreen = true;
        fullScreenApi.getFullScreenElement = function() {
            return document.msFullscreenElement;
        };
        fullScreenApi.requestFullScreen = function( element ) {
            return element.msRequestFullscreen();
        };
        fullScreenApi.exitFullScreen = function() {
            document.msExitFullscreen();
        };
        fullScreenApi.fullScreenEventName = "MSFullscreenChange";
        fullScreenApi.fullScreenErrorEventName = "MSFullscreenError";
    } else if ( document.webkitExitFullscreen ) {
        // Recent webkit
        fullScreenApi.supportsFullScreen = true;
        fullScreenApi.getFullScreenElement = function() {
            return document.webkitFullscreenElement;
        };
        fullScreenApi.requestFullScreen = function( element ) {
            return element.webkitRequestFullscreen();
        };
        fullScreenApi.exitFullScreen = function() {
            document.webkitExitFullscreen();
        };
        fullScreenApi.fullScreenEventName = "webkitfullscreenchange";
        fullScreenApi.fullScreenErrorEventName = "webkitfullscreenerror";
    } else if ( document.webkitCancelFullScreen ) {
        // Old webkit
        fullScreenApi.supportsFullScreen = true;
        fullScreenApi.getFullScreenElement = function() {
            return document.webkitCurrentFullScreenElement;
        };
        fullScreenApi.requestFullScreen = function( element ) {
            return element.webkitRequestFullScreen();
        };
        fullScreenApi.exitFullScreen = function() {
            document.webkitCancelFullScreen();
        };
        fullScreenApi.fullScreenEventName = "webkitfullscreenchange";
        fullScreenApi.fullScreenErrorEventName = "webkitfullscreenerror";
    } else if ( document.mozCancelFullScreen ) {
        // Firefox
        fullScreenApi.supportsFullScreen = true;
        fullScreenApi.getFullScreenElement = function() {
            return document.mozFullScreenElement;
        };
        fullScreenApi.requestFullScreen = function( element ) {
            return element.mozRequestFullScreen();
        };
        fullScreenApi.exitFullScreen = function() {
            document.mozCancelFullScreen();
        };
        fullScreenApi.fullScreenEventName = "mozfullscreenchange";
        fullScreenApi.fullScreenErrorEventName = "mozfullscreenerror";
    }
    fullScreenApi.isFullScreen = function() {
        return fullScreenApi.getFullScreenElement() !== null;
    };
    fullScreenApi.cancelFullScreen = function() {
        $.console.error("cancelFullScreen is deprecated. Use exitFullScreen instead.");
        fullScreenApi.exitFullScreen();
    };

    // export api
    $.extend( $, fullScreenApi );

})( OpenSeadragon );

/*
 * OpenSeadragon - EventSource
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function($){

/**
 * Event handler method signature used by all OpenSeadragon events.
 *
 * @callback EventHandler
 * @memberof OpenSeadragon
 * @param {Object} event - See individual events for event-specific properties.
 */


/**
 * @class EventSource
 * @classdesc For use by classes which want to support custom, non-browser events.
 *
 * @memberof OpenSeadragon
 */
$.EventSource = function() {
    this.events = {};
};

$.EventSource.prototype = /** @lends OpenSeadragon.EventSource.prototype */{

    // TODO: Add a method 'one' which automatically unbinds a listener after the first triggered event that matches.

    /**
     * Add an event handler for a given event.
     * @function
     * @param {String} eventName - Name of event to register.
     * @param {OpenSeadragon.EventHandler} handler - Function to call when event is triggered.
     * @param {Object} [userData=null] - Arbitrary object to be passed unchanged to the handler.
     */
    addHandler: function ( eventName, handler, userData ) {
        var events = this.events[ eventName ];
        if ( !events ) {
            this.events[ eventName ] = events = [];
        }
        if ( handler && $.isFunction( handler ) ) {
            events[ events.length ] = { handler: handler, userData: userData || null };
        }
    },

    /**
     * Remove a specific event handler for a given event.
     * @function
     * @param {String} eventName - Name of event for which the handler is to be removed.
     * @param {OpenSeadragon.EventHandler} handler - Function to be removed.
     */
    removeHandler: function ( eventName, handler ) {
        var events = this.events[ eventName ],
            handlers = [],
            i;
        if ( !events ) {
            return;
        }
        if ( $.isArray( events ) ) {
            for ( i = 0; i < events.length; i++ ) {
                if ( events[i].handler !== handler ) {
                    handlers.push( events[ i ] );
                }
            }
            this.events[ eventName ] = handlers;
        }
    },


    /**
     * Remove all event handlers for a given event type. If no type is given all
     * event handlers for every event type are removed.
     * @function
     * @param {String} eventName - Name of event for which all handlers are to be removed.
     */
    removeAllHandlers: function( eventName ) {
        if ( eventName ){
            this.events[ eventName ] = [];
        } else{
            for ( var eventType in this.events ) {
                this.events[ eventType ] = [];
            }
        }
    },

    /**
     * Get a function which iterates the list of all handlers registered for a given event, calling the handler for each.
     * @function
     * @param {String} eventName - Name of event to get handlers for.
     */
    getHandler: function ( eventName ) {
        var events = this.events[ eventName ];
        if ( !events || !events.length ) {
            return null;
        }
        events = events.length === 1 ?
            [ events[ 0 ] ] :
            Array.apply( null, events );
        return function ( source, args ) {
            var i,
                length = events.length;
            for ( i = 0; i < length; i++ ) {
                if ( events[ i ] ) {
                    args.eventSource = source;
                    args.userData = events[ i ].userData;
                    events[ i ].handler( args );
                }
            }
        };
    },

    /**
     * Trigger an event, optionally passing additional information.
     * @function
     * @param {String} eventName - Name of event to register.
     * @param {Object} eventArgs - Event-specific data.
     */
    raiseEvent: function( eventName, eventArgs ) {
        //uncomment if you want to get a log of all events
        //$.console.log( eventName );
        var handler = this.getHandler( eventName );

        if ( handler ) {
            if ( !eventArgs ) {
                eventArgs = {};
            }

            handler( this, eventArgs );
        }
    }
};

}( OpenSeadragon ));

/*
 * OpenSeadragon - MouseTracker
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function ( $ ) {

        // is any button currently being pressed while mouse events occur
    var IS_BUTTON_DOWN = false,
        // is any tracker currently capturing?
        IS_CAPTURING   = false,
        // dictionary from hash to MouseTracker
        ACTIVE         = {},
        // list of trackers interested in capture
        CAPTURING      = [],
        // dictionary from hash to private properties
        THIS           = {};

    /**
     * @class MouseTracker
     * @classdesc Provides simplified handling of common mouse, touch, and keyboard
     * events on a specific element, like 'enter', 'exit', 'press', 'release',
     * 'scroll', 'click', and 'drag'.
     *
     * @memberof OpenSeadragon
     * @param {Object} options
     *      Allows configurable properties to be entirely specified by passing
     *      an options object to the constructor.  The constructor also supports
     *      the original positional arguments 'element', 'clickTimeThreshold',
     *      and 'clickDistThreshold' in that order.
     * @param {Element|String} options.element
     *      A reference to an element or an element id for which the mouse/touch/key
     *      events will be monitored.
     * @param {Number} options.clickTimeThreshold
     *      The number of milliseconds within which multiple mouse clicks
     *      will be treated as a single event.
     * @param {Number} options.clickDistThreshold
     *      The distance between mouse click within multiple mouse clicks
     *      will be treated as a single event.
     * @param {Number} [options.stopDelay=50]
     *      The number of milliseconds without mouse move before the mouse stop
     *      event is fired.
     * @param {OpenSeadragon.EventHandler} [options.enterHandler=null]
     *      An optional handler for mouse enter.
     * @param {OpenSeadragon.EventHandler} [options.exitHandler=null]
     *      An optional handler for mouse exit.
     * @param {OpenSeadragon.EventHandler} [options.pressHandler=null]
     *      An optional handler for mouse press.
     * @param {OpenSeadragon.EventHandler} [options.releaseHandler=null]
     *      An optional handler for mouse release.
     * @param {OpenSeadragon.EventHandler} [options.moveHandler=null]
     *      An optional handler for mouse move.
     * @param {OpenSeadragon.EventHandler} [options.scrollHandler=null]
     *      An optional handler for mouse scroll.
     * @param {OpenSeadragon.EventHandler} [options.clickHandler=null]
     *      An optional handler for mouse click.
     * @param {OpenSeadragon.EventHandler} [options.dragHandler=null]
     *      An optional handler for mouse drag.
     * @param {OpenSeadragon.EventHandler} [options.keyHandler=null]
     *      An optional handler for keypress.
     * @param {OpenSeadragon.EventHandler} [options.focusHandler=null]
     *      An optional handler for focus.
     * @param {OpenSeadragon.EventHandler} [options.blurHandler=null]
     *      An optional handler for blur.
     * @param {Object} [options.userData=null]
     *      Arbitrary object to be passed unchanged to any attached handler methods.
     */
    $.MouseTracker = function ( options ) {

        var args = arguments;

        if ( !$.isPlainObject( options ) ) {
            options = {
                element:            args[ 0 ],
                clickTimeThreshold: args[ 1 ],
                clickDistThreshold: args[ 2 ]
            };
        }

        this.hash               = Math.random(); // An unique hash for this tracker.
        /**
         * The element for which mouse/touch/key events are being monitored.
         * @member {Element} element
         * @memberof OpenSeadragon.MouseTracker#
         */
        this.element            = $.getElement( options.element );
        /**
         * The number of milliseconds within which mutliple mouse clicks will be treated as a single event.
         * @member {Number} clickTimeThreshold
         * @memberof OpenSeadragon.MouseTracker#
         */
        this.clickTimeThreshold = options.clickTimeThreshold;
        /**
         * The distance between mouse click within multiple mouse clicks will be treated as a single event.
         * @member {Number} clickDistThreshold
         * @memberof OpenSeadragon.MouseTracker#
         */
        this.clickDistThreshold = options.clickDistThreshold;
        this.userData           = options.userData       || null;
        this.stopDelay          = options.stopDelay      || 50;

        this.enterHandler       = options.enterHandler   || null;
        this.exitHandler        = options.exitHandler    || null;
        this.pressHandler       = options.pressHandler   || null;
        this.releaseHandler     = options.releaseHandler || null;
        this.moveHandler        = options.moveHandler    || null;
        this.scrollHandler      = options.scrollHandler  || null;
        this.clickHandler       = options.clickHandler   || null;
        this.dragHandler        = options.dragHandler    || null;
        this.stopHandler        = options.stopHandler    || null;
        this.keyHandler         = options.keyHandler     || null;
        this.focusHandler       = options.focusHandler   || null;
        this.blurHandler        = options.blurHandler    || null;

        //Store private properties in a scope sealed hash map
        var _this = this;

        /**
         * @private
         * @property {Boolean} tracking
         *      Are we currently tracking mouse events.
         * @property {Boolean} capturing
         *      Are we curruently capturing mouse events.
         * @property {Boolean} insideElementPressed
         *      True if the left mouse button is currently being pressed and was
         *      initiated inside the tracked element, otherwise false.
         * @property {Boolean} insideElement
         *      Are we currently inside the screen area of the tracked element.
         * @property {OpenSeadragon.Point} lastPoint
         *      Position of last mouse down/move
         * @property {Number} lastMouseDownTime
         *      Time of last mouse down.
         * @property {OpenSeadragon.Point} lastMouseDownPoint
         *      Position of last mouse down
         */
        THIS[ this.hash ] = {
            mouseover:             function ( event ) { onMouseOver( _this, event, false ); },
            mouseout:              function ( event ) { onMouseOut( _this, event, false ); },
            mousedown:             function ( event ) { onMouseDown( _this, event ); },
            mouseup:               function ( event ) { onMouseUp( _this, event, false ); },
            mousemove:             function ( event ) { onMouseMove( _this, event ); },
            click:                 function ( event ) { onMouseClick( _this, event ); },
            wheel:                 function ( event ) { onWheel( _this, event ); },
            mousewheel:            function ( event ) { onMouseWheel( _this, event ); },
            DOMMouseScroll:        function ( event ) { onMouseWheel( _this, event ); },
            MozMousePixelScroll:   function ( event ) { onMouseWheel( _this, event ); },
            mouseupie:             function ( event ) { onMouseUpIE( _this, event ); },
            mousemovecapturedie:   function ( event ) { onMouseMoveCapturedIE( _this, event ); },
            mouseupcaptured:       function ( event ) { onMouseUpCaptured( _this, event ); },
            mousemovecaptured:     function ( event ) { onMouseMoveCaptured( _this, event, false ); },
            touchstart:            function ( event ) { onTouchStart( _this, event ); },
            touchmove:             function ( event ) { onTouchMove( _this, event ); },
            touchend:              function ( event ) { onTouchEnd( _this, event ); },
            keypress:              function ( event ) { onKeyPress( _this, event ); },
            focus:                 function ( event ) { onFocus( _this, event ); },
            blur:                  function ( event ) { onBlur( _this, event ); },
            tracking:              false,
            capturing:             false,
            insideElementPressed:  false,
            insideElement:         false,
            lastPoint:             null,
            lastMouseDownTime:     null,
            lastMouseDownPoint:    null,
            lastPinchDelta:        0
        };

    };

    $.MouseTracker.prototype = /** @lends OpenSeadragon.MouseTracker.prototype */{

        /**
         * Clean up any events or objects created by the mouse tracker.
         * @function
         */
        destroy: function () {
            stopTracking( this );
            this.element = null;
        },

        /**
         * Are we currently tracking events on this element.
         * @deprecated Just use this.tracking
         * @function
         * @returns {Boolean} Are we currently tracking events on this element.
         */
        isTracking: function () {
            return THIS[ this.hash ].tracking;
        },

        /**
         * Enable or disable whether or not we are tracking events on this element.
         * @function
         * @param {Boolean} track True to start tracking, false to stop tracking.
         * @returns {OpenSeadragon.MouseTracker} Chainable.
         */
        setTracking: function ( track ) {
            if ( track ) {
                startTracking( this );
            } else {
                stopTracking( this );
            }
            //chain
            return this;
        },

        /**
         * Implement or assign implementation to these handlers during or after
         * calling the constructor.
         * @function
         * @param {Object} event
         * @param {OpenSeadragon.MouseTracker} event.eventSource
         *      A reference to the tracker instance.
         * @param {OpenSeadragon.Point} event.position
         *      The position of the event relative to the tracked element.
         * @param {Boolean} event.insideElementPressed
         *      True if the left mouse button is currently being pressed and was
         *      initiated inside the tracked element, otherwise false.
         * @param {Boolean} event.buttonDownAny
         *      Was the button down anywhere in the screen during the event.
         * @param {Boolean} event.isTouchEvent
         *      True if the original event is a touch event, otherwise false.
         * @param {Object} event.originalEvent
         *      The original event object.
         * @param {Boolean} event.preventDefaultAction
         *      Set to true to prevent the tracker subscriber from performing its default action (subscriber implementation dependent). Default: false.
         * @param {Object} event.userData
         *      Arbitrary user-defined object.
         */
        enterHandler: function () { },

        /**
         * Implement or assign implementation to these handlers during or after
         * calling the constructor.
         * @function
         * @param {Object} event
         * @param {OpenSeadragon.MouseTracker} event.eventSource
         *      A reference to the tracker instance.
         * @param {OpenSeadragon.Point} event.position
         *      The position of the event relative to the tracked element.
         * @param {Boolean} event.insideElementPressed
         *      True if the left mouse button is currently being pressed and was
         *      initiated inside the tracked element, otherwise false.
         * @param {Boolean} event.buttonDownAny
         *      Was the button down anywhere in the screen during the event.
         * @param {Boolean} event.isTouchEvent
         *      True if the original event is a touch event, otherwise false.
         * @param {Object} event.originalEvent
         *      The original event object.
         * @param {Boolean} event.preventDefaultAction
         *      Set to true to prevent the tracker subscriber from performing its default action (subscriber implementation dependent). Default: false.
         * @param {Object} event.userData
         *      Arbitrary user-defined object.
         */
        exitHandler: function () { },

        /**
         * Implement or assign implementation to these handlers during or after
         * calling the constructor.
         * @function
         * @param {Object} event
         * @param {OpenSeadragon.MouseTracker} event.eventSource
         *      A reference to the tracker instance.
         * @param {OpenSeadragon.Point} event.position
         *      The position of the event relative to the tracked element.
         * @param {Boolean} event.isTouchEvent
         *      True if the original event is a touch event, otherwise false.
         * @param {Object} event.originalEvent
         *      The original event object.
         * @param {Boolean} event.preventDefaultAction
         *      Set to true to prevent the tracker subscriber from performing its default action (subscriber implementation dependent). Default: false.
         * @param {Object} event.userData
         *      Arbitrary user-defined object.
         */
        pressHandler: function () { },

        /**
         * Implement or assign implementation to these handlers during or after
         * calling the constructor.
         * @function
         * @param {Object} event
         * @param {OpenSeadragon.MouseTracker} event.eventSource
         *      A reference to the tracker instance.
         * @param {OpenSeadragon.Point} event.position
         *      The position of the event relative to the tracked element.
         * @param {Boolean} event.insideElementPressed
         *      True if the left mouse button is currently being pressed and was
         *      initiated inside the tracked element, otherwise false.
         * @param {Boolean} event.insideElementReleased
         *      True if the cursor still inside the tracked element when the button was released.
         * @param {Boolean} event.isTouchEvent
         *      True if the original event is a touch event, otherwise false.
         * @param {Object} event.originalEvent
         *      The original event object.
         * @param {Boolean} event.preventDefaultAction
         *      Set to true to prevent the tracker subscriber from performing its default action (subscriber implementation dependent). Default: false.
         * @param {Object} event.userData
         *      Arbitrary user-defined object.
         */
        releaseHandler: function () { },

        /**
         * Implement or assign implementation to these handlers during or after
         * calling the constructor.
         * @function
         * @param {Object} event
         * @param {OpenSeadragon.MouseTracker} event.eventSource
         *      A reference to the tracker instance.
         * @param {OpenSeadragon.Point} event.position
         *      The position of the event relative to the tracked element.
         * @param {Boolean} event.isTouchEvent
         *      True if the original event is a touch event, otherwise false.
         * @param {Object} event.originalEvent
         *      The original event object.
         * @param {Boolean} event.preventDefaultAction
         *      Set to true to prevent the tracker subscriber from performing its default action (subscriber implementation dependent). Default: false.
         * @param {Object} event.userData
         *      Arbitrary user-defined object.
         */
        moveHandler: function () { },

        /**
         * Implement or assign implementation to these handlers during or after
         * calling the constructor.
         * @function
         * @param {Object} event
         * @param {OpenSeadragon.MouseTracker} event.eventSource
         *      A reference to the tracker instance.
         * @param {OpenSeadragon.Point} event.position
         *      The position of the event relative to the tracked element.
         * @param {Number} event.scroll
         *      The scroll delta for the event.
         * @param {Boolean} event.shift
         *      True if the shift key was pressed during this event.
         * @param {Boolean} event.isTouchEvent
         *      True if the original event is a touch event, otherwise false.
         * @param {Object} event.originalEvent
         *      The original event object.
         * @param {Boolean} event.preventDefaultAction
         *      Set to true to prevent the tracker subscriber from performing its default action (subscriber implementation dependent). Default: false.
         * @param {Object} event.userData
         *      Arbitrary user-defined object.
         */
        scrollHandler: function () { },

        /**
         * Implement or assign implementation to these handlers during or after
         * calling the constructor.
         * @function
         * @param {Object} event
         * @param {OpenSeadragon.MouseTracker} event.eventSource
         *      A reference to the tracker instance.
         * @param {OpenSeadragon.Point} event.position
         *      The position of the event relative to the tracked element.
         * @param {Number} event.quick
         *      True only if the clickDistThreshold and clickDeltaThreshold are both passed. Useful for ignoring events.
         * @param {Boolean} event.shift
         *      True if the shift key was pressed during this event.
         * @param {Boolean} event.isTouchEvent
         *      True if the original event is a touch event, otherwise false.
         * @param {Object} event.originalEvent
         *      The original event object.
         * @param {Boolean} event.preventDefaultAction
         *      Set to true to prevent the tracker subscriber from performing its default action (subscriber implementation dependent). Default: false.
         * @param {Object} event.userData
         *      Arbitrary user-defined object.
         */
        clickHandler: function () { },

        /**
         * Implement or assign implementation to these handlers during or after
         * calling the constructor.
         * @function
         * @param {Object} event
         * @param {OpenSeadragon.MouseTracker} event.eventSource
         *      A reference to the tracker instance.
         * @param {OpenSeadragon.Point} event.position
         *      The position of the event relative to the tracked element.
         * @param {OpenSeadragon.Point} event.delta
         *      The x,y components of the difference between start drag and end drag.  Usefule for ignoring or weighting the events.
         * @param {Boolean} event.shift
         *      True if the shift key was pressed during this event.
         * @param {Boolean} event.isTouchEvent
         *      True if the original event is a touch event, otherwise false.
         * @param {Object} event.originalEvent
         *      The original event object.
         * @param {Boolean} event.preventDefaultAction
         *      Set to true to prevent the tracker subscriber from performing its default action (subscriber implementation dependent). Default: false.
         * @param {Object} event.userData
         *      Arbitrary user-defined object.
         */
        dragHandler: function () { },

        /**
         * Implement or assign implementation to these handlers during or after
         * calling the constructor.
         * @function
         * @param {Object} event
         * @param {OpenSeadragon.MouseTracker} event.eventSource
         *      A reference to the tracker instance.
         * @param {OpenSeadragon.Point} event.position
         *      The position of the event relative to the tracked element.
         * @param {Boolean} event.isTouchEvent
         *      True if the original event is a touch event, otherwise false.
         * @param {Object} event.originalEvent
         *      The original event object.
         * @param {Boolean} event.preventDefaultAction
         *      Set to true to prevent the tracker subscriber from performing its default action (subscriber implementation dependent). Default: false.
         * @param {Object} event.userData
         *      Arbitrary user-defined object.
         */
        stopHandler: function () { },

        /**
         * Implement or assign implementation to these handlers during or after
         * calling the constructor.
         * @function
         * @param {Object} event
         * @param {OpenSeadragon.MouseTracker} event.eventSource
         *      A reference to the tracker instance.
         * @param {Number} event.keyCode
         *      The key code that was pressed.
         * @param {Boolean} event.shift
         *      True if the shift key was pressed during this event.
         * @param {Object} event.originalEvent
         *      The original event object.
         * @param {Boolean} event.preventDefaultAction
         *      Set to true to prevent the tracker subscriber from performing its default action (subscriber implementation dependent). Default: false.
         * @param {Object} event.userData
         *      Arbitrary user-defined object.
         */
        keyHandler: function () { },

        /**
         * Implement or assign implementation to these handlers during or after
         * calling the constructor.
         * @function
         * @param {Object} event
         * @param {OpenSeadragon.MouseTracker} event.eventSource
         *      A reference to the tracker instance.
         * @param {Object} event.originalEvent
         *      The original event object.
         * @param {Boolean} event.preventDefaultAction
         *      Set to true to prevent the tracker subscriber from performing its default action (subscriber implementation dependent). Default: false.
         * @param {Object} event.userData
         *      Arbitrary user-defined object.
         */
        focusHandler: function () { },

        /**
         * Implement or assign implementation to these handlers during or after
         * calling the constructor.
         * @function
         * @param {Object} event
         * @param {OpenSeadragon.MouseTracker} event.eventSource
         *      A reference to the tracker instance.
         * @param {Object} event.originalEvent
         *      The original event object.
         * @param {Boolean} event.preventDefaultAction
         *      Set to true to prevent the tracker subscriber from performing its default action (subscriber implementation dependent). Default: false.
         * @param {Object} event.userData
         *      Arbitrary user-defined object.
         */
        blurHandler: function () { }
    };

    /**
     * Detect available mouse wheel event.
     */
    $.MouseTracker.wheelEventName = ( $.Browser.vendor == $.BROWSERS.IE && $.Browser.version > 8 ) ||
                                                ( 'onwheel' in document.createElement( 'div' ) ) ? 'wheel' : // Modern browsers support 'wheel'
                                    document.onmousewheel !== undefined ? 'mousewheel' :                     // Webkit and IE support at least 'mousewheel'
                                    'DOMMouseScroll';                                                        // Assume old Firefox

    /**
     * Starts tracking mouse events on this element.
     * @private
     * @inner
     */
    function startTracking( tracker ) {
        var events = [
                "mouseover", "mouseout", "mousedown", "mouseup", "mousemove",
                "click",
                $.MouseTracker.wheelEventName,
                "touchstart", "touchmove", "touchend",
                "keypress",
                "focus", "blur"
            ],
            delegate = THIS[ tracker.hash ],
            event,
            i;

        // Add 'MozMousePixelScroll' event handler for older Firefox
        if( $.MouseTracker.wheelEventName == "DOMMouseScroll" ) {
            events.push( "MozMousePixelScroll" );
        }

        if ( !delegate.tracking ) {
            for ( i = 0; i < events.length; i++ ) {
                event = events[ i ];
                $.addEvent(
                    tracker.element,
                    event,
                    delegate[ event ],
                    false
                );
            }
            delegate.tracking = true;
            ACTIVE[ tracker.hash ] = tracker;
        }
    }

    /**
     * Stops tracking mouse events on this element.
     * @private
     * @inner
     */
    function stopTracking( tracker ) {
        var events = [
                "mouseover", "mouseout", "mousedown", "mouseup", "mousemove",
                "click",
                $.MouseTracker.wheelEventName,
                "touchstart", "touchmove", "touchend",
                "keypress",
                "focus", "blur"
            ],
            delegate = THIS[ tracker.hash ],
            event,
            i;

        // Remove 'MozMousePixelScroll' event handler for older Firefox
        if( $.MouseTracker.wheelEventName == "DOMMouseScroll" ) {
            events.push( "MozMousePixelScroll" );
        }

        if ( delegate.tracking ) {
            for ( i = 0; i < events.length; i++ ) {
                event = events[ i ];
                $.removeEvent(
                    tracker.element,
                    event,
                    delegate[ event ],
                    false
                );
            }

            releaseMouse( tracker );
            delegate.tracking = false;
            delete ACTIVE[ tracker.hash ];
        }
    }

    /**
     * @private
     * @inner
     */
    function hasMouse( tracker ) {
        return THIS[ tracker.hash ].insideElement;
    }

    /**
     * Begin capturing mouse events on this element.
     * @private
     * @inner
     */
    function captureMouse( tracker ) {
        var delegate = THIS[ tracker.hash ];
        if ( !delegate.capturing ) {

            if ( $.Browser.vendor == $.BROWSERS.IE && $.Browser.version < 9 ) {
                $.removeEvent(
                    tracker.element,
                    "mouseup",
                    delegate.mouseup,
                    false
                );
                $.addEvent(
                    tracker.element,
                    "mouseup",
                    delegate.mouseupie,
                    true
                );
                $.addEvent(
                    tracker.element,
                    "mousemove",
                    delegate.mousemovecapturedie,
                    true
                );
            } else {
                $.addEvent(
                    window,
                    "mouseup",
                    delegate.mouseupcaptured,
                    true
                );
                $.addEvent(
                    window,
                    "mousemove",
                    delegate.mousemovecaptured,
                    true
                );
            }
            delegate.capturing = true;
        }
    }


    /**
     * Stop capturing mouse events on this element.
     * @private
     * @inner
     */
    function releaseMouse( tracker ) {
        var delegate = THIS[ tracker.hash ];
        if ( delegate.capturing ) {

            if ( $.Browser.vendor == $.BROWSERS.IE && $.Browser.version < 9 ) {
                $.removeEvent(
                    tracker.element,
                    "mousemove",
                    delegate.mousemovecapturedie,
                    true
                );
                $.removeEvent(
                    tracker.element,
                    "mouseup",
                    delegate.mouseupie,
                    true
                );
                $.addEvent(
                    tracker.element,
                    "mouseup",
                    delegate.mouseup,
                    false
                );
            } else {
                $.removeEvent(
                    window,
                    "mousemove",
                    delegate.mousemovecaptured,
                    true
                );
                $.removeEvent(
                    window,
                    "mouseup",
                    delegate.mouseupcaptured,
                    true
                );
            }
            delegate.capturing = false;
        }
    }


    /**
     * @private
     * @inner
     */
    function triggerOthers( tracker, handler, event, isTouch ) {
        var otherHash;
        for ( otherHash in ACTIVE ) {
            if ( ACTIVE.hasOwnProperty( otherHash ) && tracker.hash != otherHash ) {
                handler( ACTIVE[ otherHash ], event, isTouch );
            }
        }
    }


    /**
     * @private
     * @inner
     */
    function onFocus( tracker, event ) {
        //console.log( "focus %s", event );
        var propagate;
        if ( tracker.focusHandler ) {
            propagate = tracker.focusHandler(
                {
                    eventSource:          tracker,
                    originalEvent:        event,
                    preventDefaultAction: false,
                    userData:             tracker.userData
                }
            );
            if ( propagate === false ) {
                $.cancelEvent( event );
            }
        }
    }


    /**
     * @private
     * @inner
     */
    function onBlur( tracker, event ) {
        //console.log( "blur %s", event );
        var propagate;
        if ( tracker.blurHandler ) {
            propagate = tracker.blurHandler(
                {
                    eventSource:          tracker,
                    originalEvent:        event,
                    preventDefaultAction: false,
                    userData:             tracker.userData
                }
            );
            if ( propagate === false ) {
                $.cancelEvent( event );
            }
        }
    }


    /**
     * @private
     * @inner
     */
    function onKeyPress( tracker, event ) {
        //console.log( "keypress %s %s %s %s %s", event.keyCode, event.charCode, event.ctrlKey, event.shiftKey, event.altKey );
        var propagate;
        if ( tracker.keyHandler ) {
            propagate = tracker.keyHandler(
                {
                    eventSource:          tracker,
                    position:             getMouseRelative( event, tracker.element ),
                    keyCode:              event.keyCode ? event.keyCode : event.charCode,
                    shift:                event.shiftKey,
                    originalEvent:        event,
                    preventDefaultAction: false,
                    userData:             tracker.userData
                }
            );
            if ( !propagate ) {
                $.cancelEvent( event );
            }
        }
    }


    /**
     * @private
     * @inner
     */
    function onMouseOver( tracker, event, isTouch ) {

        var delegate = THIS[ tracker.hash ],
            propagate;

        isTouch = isTouch || false;

        event = $.getEvent( event );

        if ( !isTouch ) {
            if ( $.Browser.vendor == $.BROWSERS.IE &&
                 $.Browser.version < 9 &&
                 delegate.capturing &&
                 !isChild( event.srcElement, tracker.element ) ) {

                triggerOthers( tracker, onMouseOver, event, isTouch );
            }

            var to = event.target ?
                    event.target :
                    event.srcElement,
                from = event.relatedTarget ?
                    event.relatedTarget :
                    event.fromElement;

            if ( !isChild( tracker.element, to ) ||
                  isChild( tracker.element, from ) ) {
                return;
            }
        }

        delegate.insideElement = true;

        if ( tracker.enterHandler ) {
            propagate = tracker.enterHandler(
                {
                    eventSource:          tracker,
                    position:             getMouseRelative( isTouch ? event.changedTouches[ 0 ] : event, tracker.element ),
                    insideElementPressed: delegate.insideElementPressed,
                    buttonDownAny:        IS_BUTTON_DOWN,
                    isTouchEvent:         isTouch,
                    originalEvent:        event,
                    preventDefaultAction: false,
                    userData:             tracker.userData
                }
            );
            if ( propagate === false ) {
                $.cancelEvent( event );
            }
        }
    }


    /**
     * @private
     * @inner
     */
    function onMouseOut( tracker, event, isTouch ) {
        var delegate = THIS[ tracker.hash ],
            propagate;

        isTouch = isTouch || false;

        event = $.getEvent( event );

        if ( !isTouch ) {
            if ( $.Browser.vendor == $.BROWSERS.IE &&
                 $.Browser.version < 9 &&
                 delegate.capturing &&
                 !isChild( event.srcElement, tracker.element ) ) {

                triggerOthers( tracker, onMouseOut, event, isTouch );

            }

            var from = event.target ?
                    event.target :
                    event.srcElement,
                to = event.relatedTarget ?
                    event.relatedTarget :
                    event.toElement;

            if ( !isChild( tracker.element, from ) ||
                  isChild( tracker.element, to ) ) {
                return;
            }
        }

        delegate.insideElement = false;

        if ( tracker.exitHandler ) {
            propagate = tracker.exitHandler(
                {
                    eventSource:          tracker,
                    position:             getMouseRelative( isTouch ? event.changedTouches[ 0 ] : event, tracker.element ),
                    insideElementPressed: delegate.insideElementPressed,
                    buttonDownAny:        IS_BUTTON_DOWN,
                    isTouchEvent:         isTouch,
                    originalEvent:        event,
                    preventDefaultAction: false,
                    userData:             tracker.userData
                }
            );

            if ( propagate === false ) {
                $.cancelEvent( event );
            }
        }
    }


    /**
     * @private
     * @inner
     */
    function onMouseDown( tracker, event, noCapture, isTouch ) {
        var delegate = THIS[ tracker.hash ],
            propagate;

        isTouch = isTouch || false;

        event = $.getEvent(event);

        var eventOrTouchPoint = isTouch ? event.touches[ 0 ] : event;

        if ( event.button == 2 ) {
            return;
        }

        delegate.insideElementPressed = true;

        delegate.lastPoint = getMouseAbsolute( eventOrTouchPoint );
        delegate.lastMouseDownPoint = delegate.lastPoint;
        delegate.lastMouseDownTime = $.now();

        if ( tracker.pressHandler ) {
            propagate = tracker.pressHandler(
                {
                    eventSource:          tracker,
                    position:             getMouseRelative( eventOrTouchPoint, tracker.element ),
                    isTouchEvent:         isTouch,
                    originalEvent:        event,
                    preventDefaultAction: false,
                    userData:             tracker.userData
                }
            );
            if ( propagate === false ) {
                $.cancelEvent( event );
            }
        }

        if ( tracker.pressHandler || tracker.dragHandler ) {
            $.cancelEvent( event );
        }

        if ( noCapture ) {
            return;
        }

        if ( isTouch ||
             !( $.Browser.vendor == $.BROWSERS.IE && $.Browser.version < 9 ) ||
             !IS_CAPTURING ) {
            captureMouse( tracker );
            IS_CAPTURING = true;
            // reset to empty & add us
            CAPTURING = [ tracker ];
        } else if ( $.Browser.vendor == $.BROWSERS.IE && $.Browser.version < 9 ) {
            // add us to the list
            CAPTURING.push( tracker );
        }
    }

    /**
     * @private
     * @inner
     */
    function onTouchStart( tracker, event ) {
        var touchA,
            touchB;

        if ( event.touches.length == 1 &&
            event.targetTouches.length == 1 &&
            event.changedTouches.length == 1 ) {

            THIS[ tracker.hash ].lastTouch = event.touches[ 0 ];
            onMouseOver( tracker, event, true );
            // call with no capture as the onMouseMoveCaptured will 
            // be triggered by onTouchMove
            onMouseDown( tracker, event, true, true );
        }

        if ( event.touches.length == 2 ) {

            touchA = getMouseAbsolute( event.touches[ 0 ] );
            touchB = getMouseAbsolute( event.touches[ 1 ] );
            THIS[ tracker.hash ].lastPinchDelta =
                Math.abs( touchA.x - touchB.x ) +
                Math.abs( touchA.y - touchB.y );
            THIS[ tracker.hash ].pinchMidpoint = new $.Point(
                ( touchA.x + touchB.x ) / 2,
                ( touchA.y + touchB.y ) / 2
            );
            //$.console.debug("pinch start : "+THIS[ tracker.hash ].lastPinchDelta);
        }

        event.preventDefault();
    }


    /**
     * @private
     * @inner
     */
    function onMouseUp( tracker, event, isTouch ) {
        var delegate = THIS[ tracker.hash ],
            //were we inside the tracked element when we were pressed
            insideElementPressed = delegate.insideElementPressed,
            //are we still inside the tracked element when we released
            insideElementReleased = delegate.insideElement,
            propagate;

        isTouch = isTouch || false;

        event = $.getEvent(event);

        if ( event.button == 2 ) {
            return;
        }

        delegate.insideElementPressed = false;

        if ( tracker.releaseHandler ) {
            propagate = tracker.releaseHandler(
                {
                    eventSource:           tracker,
                    position:              getMouseRelative( isTouch ? event.changedTouches[ 0 ] : event, tracker.element ),
                    insideElementPressed:  insideElementPressed,
                    insideElementReleased: insideElementReleased,
                    isTouchEvent:          isTouch,
                    originalEvent:         event,
                    preventDefaultAction:  false,
                    userData:              tracker.userData
                }
            );
            if ( propagate === false ) {
                $.cancelEvent( event );
            }
        }

        if ( insideElementPressed && insideElementReleased ) {
            handleMouseClick( tracker, event, isTouch );
        }
    }


    /**
     * @private
     * @inner
     */
    function onTouchEnd( tracker, event ) {

        if ( event.touches.length === 0 &&
            event.targetTouches.length === 0 &&
            event.changedTouches.length == 1 ) {

            THIS[ tracker.hash ].lastTouch = null;

            // call with no release, as the mouse events are 
            // not registered in onTouchStart
            onMouseUpCaptured( tracker, event, true, true );
            onMouseOut( tracker, event, true );
        }
        if ( event.touches.length + event.changedTouches.length == 2 ) {
            THIS[ tracker.hash ].lastPinchDelta = null;
            THIS[ tracker.hash ].pinchMidpoint = null;
            //$.console.debug("pinch end");
        }
        event.preventDefault();
    }


    /**
     * Only triggered once by the deepest element that initially received
     * the mouse down event. We want to make sure THIS event doesn't bubble.
     * Instead, we want to trigger the elements that initially received the
     * mouse down event (including this one) only if the mouse is no longer
     * inside them. Then, we want to release capture, and emulate a regular
     * mouseup on the event that this event was meant for.
     * @private
     * @inner
     */
    function onMouseUpIE( tracker, event ) {
        var othertracker,
            i;

        event = $.getEvent( event );

        if ( event.button == 2 ) {
            return;
        }

        for ( i = 0; i < CAPTURING.length; i++ ) {
            othertracker = CAPTURING[ i ];
            if ( !hasMouse( othertracker ) ) {
                onMouseUp( othertracker, event, false );
            }
        }

        releaseMouse( tracker );
        IS_CAPTURING = false;
        event.srcElement.fireEvent(
            "on" + event.type,
            document.createEventObject( event )
        );

        $.stopEvent( event );
    }


    /**
     * Only triggered in W3C browsers by elements within which the mouse was
     * initially pressed, since they are now listening to the window for
     * mouseup during the capture phase. We shouldn't handle the mouseup
     * here if the mouse is still inside this element, since the regular
     * mouseup handler will still fire.
     * @private
     * @inner
     */
    function onMouseUpCaptured( tracker, event, noRelease, isTouch ) {
        isTouch = isTouch || false;

        if ( !THIS[ tracker.hash ].insideElement || isTouch ) {
            onMouseUp( tracker, event, isTouch );
        }

        if ( noRelease ) {
            return;
        }

        releaseMouse( tracker );
    }


    /**
     * @private
     * @inner
     */
    function onMouseMove( tracker, event ) {
        if ( tracker.moveHandler ) {
            event = $.getEvent( event );

            var propagate = tracker.moveHandler(
                {
                    eventSource:          tracker,
                    position:             getMouseRelative( event, tracker.element ),
                    isTouchEvent:         false,
                    originalEvent:        event,
                    preventDefaultAction: false,
                    userData:             tracker.userData
                }
            );
            if ( propagate === false ) {
                $.cancelEvent( event );
            }
        }
        if ( tracker.stopHandler ) {
            clearTimeout( tracker.stopTimeOut );
            tracker.stopTimeOut = setTimeout( function() {
                onMouseStop( tracker, event );
            }, tracker.stopDelay );
        }
    }
    
    /**
     * @private
     * @inner
     */
    function onMouseStop( tracker, originalMoveEvent ) {
        if ( tracker.stopHandler ) {
            tracker.stopHandler( {
                eventSource:          tracker,
                position:             getMouseRelative( originalMoveEvent, tracker.element ),
                isTouchEvent:         false,
                originalEvent:        originalMoveEvent,
                preventDefaultAction: false,
                userData:             tracker.userData
            } );
        }
    }

    /**
     * @private
     * @inner
     */
    function onMouseClick( tracker, event ) {
        if ( tracker.clickHandler ) {
            $.cancelEvent( event );
        }
    }


    /**
     * Handler for 'wheel' events
     *
     * @private
     * @inner
     */
    function onWheel( tracker, event ) {
        handleWheelEvent( tracker, event, event, false );
    }


    /**
     * Handler for 'mousewheel', 'DOMMouseScroll', and 'MozMousePixelScroll' events
     *
     * @private
     * @inner
     */
    function onMouseWheel( tracker, event ) {
        // For legacy IE, access the global (window) event object
        event = event || window.event;

        // Simulate a 'wheel' event
        var simulatedEvent = {
            target:     event.target || event.srcElement,
            type:       "wheel",
            shiftKey:   event.shiftKey || false,
            clientX:    event.clientX,
            clientY:    event.clientY,
            pageX:      event.pageX ? event.pageX : event.clientX,
            pageY:      event.pageY ? event.pageY : event.clientY,
            deltaMode:  event.type == "MozMousePixelScroll" ? 0 : 1, // 0=pixel, 1=line, 2=page
            deltaX:     0,
            deltaZ:     0
        };

        // Calculate deltaY
        if ( $.MouseTracker.wheelEventName == "mousewheel" ) {
            simulatedEvent.deltaY = - 1 / $.DEFAULT_SETTINGS.pixelsPerWheelLine * event.wheelDelta;
        } else {
            simulatedEvent.deltaY = event.detail;
        }

        handleWheelEvent( tracker, simulatedEvent, event, false );
    }


    /**
     * Handles 'wheel' events. 
     * The event may be simulated by the legacy mouse wheel event handler (onMouseWheel()) or onTouchMove().
     *
     * @private
     * @inner
     */
    function handleWheelEvent( tracker, event, originalEvent, isTouch ) {
        var nDelta = 0,
            propagate;

        isTouch = isTouch || false;

        // The nDelta variable is gated to provide smooth z-index scrolling
        //   since the mouse wheel allows for substantial deltas meant for rapid
        //   y-index scrolling.
        // event.deltaMode: 0=pixel, 1=line, 2=page
        // TODO: Deltas in pixel mode should be accumulated then a scroll value computed after $.DEFAULT_SETTINGS.pixelsPerWheelLine threshold reached
        nDelta = event.deltaY < 0 ? 1 : -1;

        if ( tracker.scrollHandler ) {
            propagate = tracker.scrollHandler(
                {
                    eventSource:          tracker,
                    position:             getMouseRelative( event, tracker.element ),
                    scroll:               nDelta,
                    shift:                event.shiftKey,
                    isTouchEvent:         isTouch,
                    originalEvent:        originalEvent,
                    preventDefaultAction: false,
                    userData:             tracker.userData
                }
            );
            if ( propagate === false ) {
                $.cancelEvent( originalEvent );
            }
        }
    }


    /**
     * @private
     * @inner
     */
    function handleMouseClick( tracker, event, isTouch ) {
        var delegate = THIS[ tracker.hash ],
            propagate;

        isTouch = isTouch || false;

        event = $.getEvent( event );

        var eventOrTouchPoint = isTouch ? event.changedTouches[ 0 ] : event;

        if ( event.button == 2 ) {
            return;
        }

        var time = $.now() - delegate.lastMouseDownTime,
            point = getMouseAbsolute( eventOrTouchPoint ),
            distance = delegate.lastMouseDownPoint.distanceTo( point ),
            quick = time <= tracker.clickTimeThreshold &&
                       distance <= tracker.clickDistThreshold;

        if ( tracker.clickHandler ) {
            propagate = tracker.clickHandler(
                {
                    eventSource:          tracker,
                    position:             getMouseRelative( eventOrTouchPoint, tracker.element ),
                    quick:                quick,
                    shift:                event.shiftKey,
                    isTouchEvent:         isTouch,
                    originalEvent:        event,
                    preventDefaultAction: false,
                    userData:             tracker.userData
                }
            );
            if ( propagate === false ) {
                $.cancelEvent( event );
            }
        }
    }


    /**
     * @private
     * @inner
     */
    function onMouseMoveCaptured( tracker, event, isTouch ) {
        var delegate = THIS[ tracker.hash ],
            delta,
            propagate,
            point;

        isTouch = isTouch || false;

        event = $.getEvent(event);
        var eventOrTouchPoint = isTouch ? event.touches[ 0 ] : event;
        point = getMouseAbsolute( eventOrTouchPoint );
        delta = point.minus( delegate.lastPoint );

        delegate.lastPoint = point;

        if ( tracker.dragHandler ) {
            propagate = tracker.dragHandler(
                {
                    eventSource:          tracker,
                    position:             getMouseRelative( eventOrTouchPoint, tracker.element ),
                    delta:                delta,
                    shift:                event.shiftKey,
                    isTouchEvent:         isTouch,
                    originalEvent:        event,
                    preventDefaultAction: false,
                    userData:             tracker.userData
                }
            );
            if ( propagate === false ) {
                $.cancelEvent( event );
            }
        }
    }


    /**
     * @private
     * @inner
     */
    function onTouchMove( tracker, event ) {
        var touchA,
            touchB,
            pinchDelta;

        if ( !THIS[ tracker.hash ].lastTouch ) {
            return;
        }

        if ( event.touches.length === 1 &&
            event.targetTouches.length === 1 &&
            event.changedTouches.length === 1 &&
            THIS[ tracker.hash ].lastTouch.identifier === event.touches[ 0 ].identifier ) {

            onMouseMoveCaptured( tracker, event, true );

        } else if ( event.touches.length === 2 ) {

            touchA = getMouseAbsolute( event.touches[ 0 ] );
            touchB = getMouseAbsolute( event.touches[ 1 ] );
            pinchDelta =
                Math.abs( touchA.x - touchB.x ) +
                Math.abs( touchA.y - touchB.y );

            //TODO: make the 75px pinch threshold configurable
            if ( Math.abs( THIS[ tracker.hash ].lastPinchDelta - pinchDelta ) > 75 ) {
                //$.console.debug( "pinch delta : " + pinchDelta + " | previous : " + THIS[ tracker.hash ].lastPinchDelta);

                // Simulate a 'wheel' event
                var simulatedEvent = {
                    target:     event.target || event.srcElement,
                    type:       "wheel",
                    shiftKey:   event.shiftKey || false,
                    clientX:    THIS[ tracker.hash ].pinchMidpoint.x,
                    clientY:    THIS[ tracker.hash ].pinchMidpoint.y,
                    pageX:      THIS[ tracker.hash ].pinchMidpoint.x,
                    pageY:      THIS[ tracker.hash ].pinchMidpoint.y,
                    deltaMode:  1, // 0=pixel, 1=line, 2=page
                    deltaX:     0,
                    deltaY:     ( THIS[ tracker.hash ].lastPinchDelta > pinchDelta ) ? 1 : -1,
                    deltaZ:     0
                };

                handleWheelEvent( tracker, simulatedEvent, event, true );

                THIS[ tracker.hash ].lastPinchDelta = pinchDelta;
            }
        }
        event.preventDefault();
    }

    /**
     * Only triggered once by the deepest element that initially received
     * the mouse down event. Since no other element has captured the mouse,
     * we want to trigger the elements that initially received the mouse
     * down event (including this one). The the param tracker isn't used
     * but for consistency with the other event handlers we include it.
     * @private
     * @inner
     */
    function onMouseMoveCapturedIE( tracker, event ) {
        var i;
        for ( i = 0; i < CAPTURING.length; i++ ) {
            onMouseMoveCaptured( CAPTURING[ i ], event, false );
        }

        $.stopEvent( event );
    }

    /**
     * @private
     * @inner
     */
    function getMouseAbsolute( event ) {
        return $.getMousePosition( event );
    }

    /**
     * @private
     * @inner
     */
    function getMouseRelative( event, element ) {
        var mouse  = $.getMousePosition( event ),
            offset = $.getElementOffset( element );

        return mouse.minus( offset );
    }

    /**
     * @private
     * @inner
     * Returns true if elementB is a child node of elementA, or if they're equal.
     */
    function isChild( elementA, elementB ) {
        var body = document.body;
        while ( elementB && elementA != elementB && body != elementB ) {
            try {
                elementB = elementB.parentNode;
            } catch ( e ) {
                return false;
            }
        }
        return elementA == elementB;
    }

    /**
     * @private
     * @inner
     */
    function onGlobalMouseDown() {
        IS_BUTTON_DOWN = true;
    }

    /**
     * @private
     * @inner
     */
    function onGlobalMouseUp() {
        IS_BUTTON_DOWN = false;
    }


    (function () {
        if ( $.Browser.vendor == $.BROWSERS.IE && $.Browser.version < 9 ) {
            $.addEvent( document, "mousedown", onGlobalMouseDown, false );
            $.addEvent( document, "mouseup", onGlobalMouseUp, false );
        } else {
            $.addEvent( window, "mousedown", onGlobalMouseDown, true );
            $.addEvent( window, "mouseup", onGlobalMouseUp, true );
        }
    } )();

} ( OpenSeadragon ) );

/*
 * OpenSeadragon - Control
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

/**
 * An enumeration of supported locations where controls can be anchored.
 * The anchoring is always relative to the container.
 * @member ControlAnchor
 * @memberof OpenSeadragon
 * @static
 * @type {Object}
 * @property {Number} NONE
 * @property {Number} TOP_LEFT
 * @property {Number} TOP_RIGHT
 * @property {Number} BOTTOM_LEFT
 * @property {Number} BOTTOM_RIGHT
 * @property {Number} ABSOLUTE
 */
$.ControlAnchor = {
    NONE: 0,
    TOP_LEFT: 1,
    TOP_RIGHT: 2,
    BOTTOM_RIGHT: 3,
    BOTTOM_LEFT: 4,
    ABSOLUTE: 5
};

/**
 * @class Control
 * @classdesc A Control represents any interface element which is meant to allow the user
 * to interact with the zoomable interface. Any control can be anchored to any
 * element.
 *
 * @memberof OpenSeadragon
 * @param {Element} element - the control element to be anchored in the container.
 * @param {Object } options - All required and optional settings for configuring a control element.
 * @param {OpenSeadragon.ControlAnchor} [options.anchor=OpenSeadragon.ControlAnchor.NONE] - the position of the control
 *  relative to the container.
 * @param {Boolean} [options.attachToViewer=true] - Whether the control should be added directly to the viewer, or
 *  directly to the container
 * @param {Boolean} [options.autoFade=true] - Whether the control should have the autofade behavior
 * @param {Element} container - the element to control will be anchored too.
 */
$.Control = function ( element, options, container ) {
    var parent = element.parentNode;
    if (typeof options === 'number')
    {
        $.console.error("Passing an anchor directly into the OpenSeadragon.Control constructor is deprecated; " +
                        "please use an options object instead.  " +
                        "Support for this deprecated variant is scheduled for removal in December 2013");
         options = {anchor: options};
    }
    options.attachToViewer = (typeof options.attachToViewer === 'undefined') ? true : options.attachToViewer;
    /**
     * True if the control should have autofade behavior.
     * @member {Boolean} autoFade
     * @memberof OpenSeadragon.Control#
     */
    this.autoFade = (typeof options.autoFade === 'undefined') ? true : options.autoFade;
    /**
     * The element providing the user interface with some type of control (e.g. a zoom-in button).
     * @member {Element} element
     * @memberof OpenSeadragon.Control#
     */
    this.element    = element;
    /**
     * The position of the Control relative to its container.
     * @member {OpenSeadragon.ControlAnchor} anchor
     * @memberof OpenSeadragon.Control#
     */
    this.anchor     = options.anchor;
    /**
     * The Control's containing element.
     * @member {Element} container
     * @memberof OpenSeadragon.Control#
     */
    this.container  = container;
    /**
     * A neutral element surrounding the control element.
     * @member {Element} wrapper
     * @memberof OpenSeadragon.Control#
     */
    if ( this.anchor == $.ControlAnchor.ABSOLUTE ) {
        this.wrapper    = $.makeNeutralElement( "div" );
        this.wrapper.style.position = "absolute";
        this.wrapper.style.top = typeof ( options.top )  == "number" ? ( options.top + 'px' ) : options.top;
        this.wrapper.style.left  = typeof ( options.left )  == "number" ?  (options.left + 'px' ) : options.left;
        this.wrapper.style.height = typeof ( options.height )  == "number" ? ( options.height + 'px' ) : options.height;
        this.wrapper.style.width  = typeof ( options.width )  == "number" ? ( options.width + 'px' ) : options.width;
        this.wrapper.style.margin = "0px";
        this.wrapper.style.padding = "0px";

        this.element.style.position = "relative";
        this.element.style.top = "0px";
        this.element.style.left = "0px";
        this.element.style.height = "100%";
        this.element.style.width = "100%";

        if (options.position === 'OUTSIDE') {
            this.wrapper.style.overflowX = "hidden";
            this.wrapper.style.overflowY = "scroll";
            this.element.style.height = "auto";
        }
    } else {
        this.wrapper    = $.makeNeutralElement( "div" );
        this.wrapper.style.display = "inline-block";
        if ( this.anchor == $.ControlAnchor.NONE ) {
            // IE6 fix
            this.wrapper.style.width = this.wrapper.style.height = "100%";
        }
    }
    this.wrapper.appendChild( this.element );

    if (options.attachToViewer ) {
        if ( this.anchor == $.ControlAnchor.TOP_RIGHT ||
             this.anchor == $.ControlAnchor.BOTTOM_RIGHT ) {
            this.container.insertBefore(
                this.wrapper,
                this.container.firstChild
            );
        } else {
            this.container.appendChild( this.wrapper );
        }
    } else {
        parent.appendChild( this.wrapper );
    }
};

$.Control.prototype = /** @lends OpenSeadragon.Control.prototype */{

    /**
     * Removes the control from the container.
     * @function
     */
    destroy: function() {
        this.wrapper.removeChild( this.element );
        this.container.removeChild( this.wrapper );
    },

    /**
     * Determines if the control is currently visible.
     * @function
     * @return {Boolean} true if currenly visible, false otherwise.
     */
    isVisible: function() {
        return this.wrapper.style.display != "none";
    },

    /**
     * Toggles the visibility of the control.
     * @function
     * @param {Boolean} visible - true to make visible, false to hide.
     */
    setVisible: function( visible ) {
        this.wrapper.style.display = visible ?
            ( this.anchor == $.ControlAnchor.ABSOLUTE ? 'block' : 'inline-block' ) :
            "none";
    },

    /**
     * Sets the opacity level for the control.
     * @function
     * @param {Number} opactiy - a value between 1 and 0 inclusively.
     */
    setOpacity: function( opacity ) {
        if ( this.element[ $.SIGNAL ] && $.Browser.vendor == $.BROWSERS.IE ) {
            $.setElementOpacity( this.element, opacity, true );
        } else {
            $.setElementOpacity( this.wrapper, opacity, true );
        }
    }
};

}( OpenSeadragon ));

/*
 * OpenSeadragon - ControlDock
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){
    /**
     * @class ControlDock
     * @classdesc Provides a container element (a &lt;form&gt; element) with support for the layout of control elements.
     *
     * @memberof OpenSeadragon
     */
    $.ControlDock = function( options ){
        var layouts = [ 'topleft', 'topright', 'bottomright', 'bottomleft'],
            layout,
            i;

        $.extend( true, this, {
            id: 'controldock-'+$.now()+'-'+Math.floor(Math.random()*1000000),
            container: $.makeNeutralElement( 'div' ),
            controls: []
        }, options );

        // Disable the form's submit; otherwise button clicks and return keys
        // can trigger it.
        this.container.onsubmit = function() {
            return false;
        };

        if( this.element ){
            this.element = $.getElement( this.element );
            this.element.appendChild( this.container );
            this.element.style.position = 'relative';
            this.container.style.width = '100%';
            this.container.style.height = '100%';
        }

        for( i = 0; i < layouts.length; i++ ){
            layout = layouts[ i ];
            this.controls[ layout ] = $.makeNeutralElement( "div" );
            this.controls[ layout ].style.position = 'absolute';
            if ( layout.match( 'left' ) ){
                this.controls[ layout ].style.left = '0px';

                if (options.referenceStripScroll === 'vertical' && options.referenceStripPosition === 'OUTSIDE') {
                    this.controls[ layout ].style.left = (options.referenceStripWidth || 0 ) + 'px';
                }
            }
            if ( layout.match( 'right' ) ){
                this.controls[ layout ].style.right = '0px';
            }
            if ( layout.match( 'top' ) ){
                this.controls[ layout ].style.top = '0px';
            }
            if ( layout.match( 'bottom' ) ){
                this.controls[ layout ].style.bottom = '0px';
            }
        }

        this.container.appendChild( this.controls.topleft );
        this.container.appendChild( this.controls.topright );
        this.container.appendChild( this.controls.bottomright );
        this.container.appendChild( this.controls.bottomleft );
    };

    $.ControlDock.prototype = /** @lends OpenSeadragon.ControlDock.prototype */{

        /**
         * @function
         */
        addControl: function ( element, controlOptions ) {
            element = $.getElement( element );
            var div = null;

            if ( getControlIndex( this, element ) >= 0 ) {
                return;     // they're trying to add a duplicate control
            }

            switch ( controlOptions.anchor ) {
                case $.ControlAnchor.TOP_RIGHT:
                    div = this.controls.topright;
                    element.style.position = "relative";
                    element.style.paddingRight = "0px";
                    element.style.paddingTop = "0px";
                    break;
                case $.ControlAnchor.BOTTOM_RIGHT:
                    div = this.controls.bottomright;
                    element.style.position = "relative";
                    element.style.paddingRight = "0px";
                    element.style.paddingBottom = "0px";
                    break;
                case $.ControlAnchor.BOTTOM_LEFT:
                    div = this.controls.bottomleft;
                    element.style.position = "relative";
                    element.style.paddingLeft = "0px";
                    element.style.paddingBottom = "0px";
                    break;
                case $.ControlAnchor.TOP_LEFT:
                    div = this.controls.topleft;
                    element.style.position = "relative";
                    element.style.paddingLeft = "0px";
                    element.style.paddingTop = "0px";
                    break;
                case $.ControlAnchor.ABSOLUTE:
                    div = this.container;
                    element.style.margin = "0px";
                    element.style.padding = "0px";
                    break;
                default:
                case $.ControlAnchor.NONE:
                    div = this.container;
                    element.style.margin = "0px";
                    element.style.padding = "0px";
                    break;
            }

            this.controls.push(
                new $.Control( element, controlOptions, div )
            );
            element.style.display = "inline-block";
        },


        /**
         * @function
         * @return {OpenSeadragon.ControlDock} Chainable.
         */
        removeControl: function ( element ) {
            element = $.getElement( element );
            var i = getControlIndex( this, element );

            if ( i >= 0 ) {
                this.controls[ i ].destroy();
                this.controls.splice( i, 1 );
            }

            return this;
        },

        /**
         * @function
         * @return {OpenSeadragon.ControlDock} Chainable.
         */
        clearControls: function () {
            while ( this.controls.length > 0 ) {
                this.controls.pop().destroy();
            }

            return this;
        },


        /**
         * @function
         * @return {Boolean}
         */
        areControlsEnabled: function () {
            var i;

            for ( i = this.controls.length - 1; i >= 0; i-- ) {
                if ( this.controls[ i ].isVisible() ) {
                    return true;
                }
            }

            return false;
        },


        /**
         * @function
         * @return {OpenSeadragon.ControlDock} Chainable.
         */
        setControlsEnabled: function( enabled ) {
            var i;

            for ( i = this.controls.length - 1; i >= 0; i-- ) {
                this.controls[ i ].setVisible( enabled );
            }

            return this;
        }

    };


    ///////////////////////////////////////////////////////////////////////////////
    // Utility methods
    ///////////////////////////////////////////////////////////////////////////////
    function getControlIndex( dock, element ) {
        var controls = dock.controls,
            i;

        for ( i = controls.length - 1; i >= 0; i-- ) {
            if ( controls[ i ].element == element ) {
                return i;
            }
        }

        return -1;
    }

}( OpenSeadragon ));

/*
 * OpenSeadragon - Viewer
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

// dictionary from hash to private properties
var THIS = {},
// We keep a list of viewers so we can 'wake-up' each viewer on
// a page after toggling between fullpage modes
    VIEWERS = {};

/**
 *
 * The main point of entry into creating a zoomable image on the page.
 *
 * We have provided an idiomatic javascript constructor which takes
 * a single object, but still support the legacy positional arguments.
 *
 * The options below are given in order that they appeared in the constructor
 * as arguments and we translate a positional call into an idiomatic call.
 *
 * @class Viewer
 * @classdesc The main OpenSeadragon viewer class.
 *
 * @memberof OpenSeadragon
 * @extends OpenSeadragon.EventSource
 * @extends OpenSeadragon.ControlDock
 * @param {OpenSeadragon.Options} options - Viewer options.
 *
 **/
$.Viewer = function( options ) {

    var args  = arguments,
        _this = this,
        i;


    //backward compatibility for positional args while prefering more
    //idiomatic javascript options object as the only argument
    if( !$.isPlainObject( options ) ){
        options = {
            id:                 args[ 0 ],
            xmlPath:            args.length > 1 ? args[ 1 ] : undefined,
            prefixUrl:          args.length > 2 ? args[ 2 ] : undefined,
            controls:           args.length > 3 ? args[ 3 ] : undefined,
            overlays:           args.length > 4 ? args[ 4 ] : undefined
        };
    }

    //options.config and the general config argument are deprecated
    //in favor of the more direct specification of optional settings
    //being pass directly on the options object
    if ( options.config ){
        $.extend( true, options, options.config );
        delete options.config;
    }

    //Public properties
    //Allow the options object to override global defaults
    $.extend( true, this, {

        //internal state and dom identifiers
        id:             options.id,
        hash:           options.hash || options.id,

        //dom nodes
        /**
         * The parent element of this Viewer instance, passed in when the Viewer was created.
         * @member {Element} element
         * @memberof OpenSeadragon.Viewer#
         */
        element:        null,
        /**
         * A &lt;div&gt; element (provided by {@link OpenSeadragon.ControlDock}), the base element of this Viewer instance.<br><br>
         * Child element of {@link OpenSeadragon.Viewer#element}.
         * @member {Element} container
         * @memberof OpenSeadragon.Viewer#
         */
        container:      null,
        /**
         * A &lt;textarea&gt; element, the element where keyboard events are handled.<br><br>
         * Child element of {@link OpenSeadragon.Viewer#container},
         * positioned below {@link OpenSeadragon.Viewer#canvas}.
         * @member {Element} keyboardCommandArea
         * @memberof OpenSeadragon.Viewer#
         */
        keyboardCommandArea: null,
        /**
         * A &lt;div&gt; element, the element where user-input events are handled for panning and zooming.<br><br>
         * Child element of {@link OpenSeadragon.Viewer#container},
         * positioned on top of {@link OpenSeadragon.Viewer#keyboardCommandArea}.<br><br>
         * The parent of {@link OpenSeadragon.Drawer#canvas} instances.
         * @member {Element} canvas
         * @memberof OpenSeadragon.Viewer#
         */
        canvas:         null,

        // Overlays list. An overlay allows to add html on top of the viewer.
        overlays:           [],
        // Container inside the canvas where overlays are drawn.
        overlaysContainer:  null,

        //private state properties
        previousBody:   [],

        //This was originally initialized in the constructor and so could never
        //have anything in it.  now it can because we allow it to be specified
        //in the options and is only empty by default if not specified. Also
        //this array was returned from get_controls which I find confusing
        //since this object has a controls property which is treated in other
        //functions like clearControls.  I'm removing the accessors.
        customControls: [],

        //These are originally not part options but declared as members
        //in initialize.  It's still considered idiomatic to put them here
        source:         null,
        /**
         * Handles rendering of tiles in the viewer. Created for each TileSource opened.
         * @member {OpenSeadragon.Drawer} drawer
         * @memberof OpenSeadragon.Viewer#
         */
        drawer:             null,
        drawers:            [],
        // Container inside the canvas where drawers (layers) are drawn.
        drawersContainer:   null,
        /**
         * Handles coordinate-related functionality - zoom, pan, rotation, etc. Created for each TileSource opened.
         * @member {OpenSeadragon.Viewport} viewport
         * @memberof OpenSeadragon.Viewer#
         */
        viewport:       null,
        /**
         * @member {OpenSeadragon.Navigator} navigator
         * @memberof OpenSeadragon.Viewer#
         */
        navigator:      null,

        //A collection viewport is a separate viewport used to provide
        //simultaneous rendering of sets of tiles
        collectionViewport:     null,
        collectionDrawer:       null,

        //UI image resources
        //TODO: rename navImages to uiImages
        navImages:      null,

        //interface button controls
        buttons:        null,

        //TODO: this is defunct so safely remove it
        profiler:       null

    }, $.DEFAULT_SETTINGS, options );

    if ( typeof( this.hash) === "undefined" ) {
        throw new Error("A hash must be defined, either by specifying options.id or options.hash.");
    }
    if ( typeof( THIS[ this.hash ] ) !== "undefined" ) {
        // We don't want to throw an error here, as the user might have discarded
        // the previous viewer with the same hash and now want to recreate it.
        $.console.warn("Hash " + this.hash + " has already been used.");
    }

    //Private state properties
    THIS[ this.hash ] = {
        "fsBoundsDelta":     new $.Point( 1, 1 ),
        "prevContainerSize": null,
        "animating":         false,
        "forceRedraw":       false,
        "mouseInside":       false,
        "group":             null,
        // whether we should be continuously zooming
        "zooming":           false,
        // how much we should be continuously zooming by
        "zoomFactor":        null,
        "lastZoomTime":      null,
        // did we decide this viewer has a sequence of tile sources
        "sequenced":         false,
        "sequence":          0,
        "fullPage":          false,
        "onfullscreenchange": null
    };

    this._updateRequestId = null;
    this.currentOverlays = [];

    //Inherit some behaviors and properties
    $.EventSource.call( this );

    this.addHandler( 'open-failed', function ( event ) {
        var msg = $.getString( "Errors.OpenFailed", event.eventSource, event.message);
        _this._showMessage( msg );
    });

    $.ControlDock.call( this, options );

    //Deal with tile sources
    var initialTileSource;

    if ( this.xmlPath  ){
        //Deprecated option.  Now it is preferred to use the tileSources option
        this.tileSources = [ this.xmlPath ];
    }

    if ( this.tileSources  ){
        // tileSources is a complex option...
        //
        // It can be a string, object, or an array of any of strings and objects.
        // At this point we only care about if it is an Array or not.
        //
        if( $.isArray( this.tileSources ) ){

            //must be a sequence of tileSource since the first item
            //is a legacy tile source
            if( this.tileSources.length > 1 ){
                THIS[ this.hash ].sequenced = true;
            }

            //Keeps the initial page within bounds
            if ( this.initialPage > this.tileSources.length - 1 ){
                this.initialPage = this.tileSources.length - 1;
            }

            initialTileSource = this.tileSources[ this.initialPage ];

            //Update the sequence (aka currrent page) property
            THIS[ this.hash ].sequence = this.initialPage;
        } else {
            initialTileSource = this.tileSources;
        }
    }

    this.element              = this.element || document.getElementById( this.id );
    this.canvas               = $.makeNeutralElement( "div" );
    this.keyboardCommandArea  = $.makeNeutralElement( "textarea" );
    this.drawersContainer     = $.makeNeutralElement( "div" );
    this.overlaysContainer    = $.makeNeutralElement( "div" );

    this.canvas.className = "openseadragon-canvas";
    (function( style ){
        style.width    = "100%";
        style.height   = "100%";
        style.overflow = "hidden";
        style.position = "absolute";
        style.top      = "0px";
        style.left     = "0px";
    }(  this.canvas.style ));

    //the container is created through applying the ControlDock constructor above
    this.container.className = "openseadragon-container";
    (function( style ){
        style.width     = "100%";
        style.height    = "100%";
        style.position  = "relative";
        style.overflow  = "hidden";
        style.left      = "0px";
        style.top       = "0px";
        style.textAlign = "left";  // needed to protect against
    }( this.container.style ));

    this.keyboardCommandArea.className = "keyboard-command-area";
    (function( style ){
        style.width    = "100%";
        style.height   = "100%";
        style.overflow = "hidden";
        style.position = "absolute";
        style.top      = "0px";
        style.left     = "0px";
        style.resize   = "none";
    }(  this.keyboardCommandArea.style ));

    this.container.insertBefore( this.canvas, this.container.firstChild );
    this.container.insertBefore( this.keyboardCommandArea, this.container.firstChild );
    this.element.appendChild( this.container );
    this.canvas.appendChild( this.drawersContainer );
    this.canvas.appendChild( this.overlaysContainer );

    //Used for toggling between fullscreen and default container size
    //TODO: these can be closure private and shared across Viewer
    //      instances.
    this.bodyWidth      = document.body.style.width;
    this.bodyHeight     = document.body.style.height;
    this.bodyOverflow   = document.body.style.overflow;
    this.docOverflow    = document.documentElement.style.overflow;

    this.keyboardCommandArea.innerTracker = new $.MouseTracker({
            _this : this,
            element:            this.keyboardCommandArea,
            focusHandler:       function( event ){
                if ( !event.preventDefaultAction ) {
                    var point    = $.getElementPosition( this.element );
                    window.scrollTo( 0, point.y );
                }
            },

            keyHandler:         function( event ){
                if ( !event.preventDefaultAction ) {
                    switch( event.keyCode ){
                        case 61://=|+
                            _this.viewport.zoomBy(1.1);
                            _this.viewport.applyConstraints();
                            return false;
                        case 45://-|_
                            _this.viewport.zoomBy(0.9);
                            _this.viewport.applyConstraints();
                            return false;
                        case 48://0|)
                            _this.viewport.goHome();
                            _this.viewport.applyConstraints();
                            return false;
                        case 119://w
                        case 87://W
                        case 38://up arrow
                            if ( event.shift ) {
                                _this.viewport.zoomBy(1.1);
                            } else {
                                _this.viewport.panBy(new $.Point(0, -0.05));
                            }
                            _this.viewport.applyConstraints();
                            return false;
                        case 115://s
                        case 83://S
                        case 40://down arrow
                            if ( event.shift ) {
                                _this.viewport.zoomBy(0.9);
                            } else {
                                _this.viewport.panBy(new $.Point(0, 0.05));
                            }
                            _this.viewport.applyConstraints();
                            return false;
                        case 97://a
                        case 37://left arrow
                            _this.viewport.panBy(new $.Point(-0.05, 0));
                            _this.viewport.applyConstraints();
                            return false;
                        case 100://d
                        case 39://right arrow
                            _this.viewport.panBy(new $.Point(0.05, 0));
                            _this.viewport.applyConstraints();
                            return false;
                        default:
                            //console.log( 'navigator keycode %s', event.keyCode );
                            return true;
                    }
                }
            }
        }).setTracking( true ); // default state


    this.innerTracker = new $.MouseTracker({
        element:            this.canvas,
        clickTimeThreshold: this.clickTimeThreshold,
        clickDistThreshold: this.clickDistThreshold,
        clickHandler:       $.delegate( this, onCanvasClick ),
        dragHandler:        $.delegate( this, onCanvasDrag ),
        releaseHandler:     $.delegate( this, onCanvasRelease ),
        scrollHandler:      $.delegate( this, onCanvasScroll )
    }).setTracking( this.mouseNavEnabled ? true : false ); // default state

    this.outerTracker = new $.MouseTracker({
        element:            this.container,
        clickTimeThreshold: this.clickTimeThreshold,
        clickDistThreshold: this.clickDistThreshold,
        enterHandler:       $.delegate( this, onContainerEnter ),
        exitHandler:        $.delegate( this, onContainerExit ),
        releaseHandler:     $.delegate( this, onContainerRelease )
    }).setTracking( this.mouseNavEnabled ? true : false ); // always tracking

    if( this.toolbar ){
        this.toolbar = new $.ControlDock({ element: this.toolbar });
    }

    this.bindStandardControls();
    this.bindSequenceControls();

    if ( initialTileSource ) {
        this.open( initialTileSource );

        if ( this.tileSources.length > 1 ) {
            this._updateSequenceButtons( this.initialPage );
        }
    }

    for ( i = 0; i < this.customControls.length; i++ ) {
        this.addControl(
            this.customControls[ i ].id,
            {anchor: this.customControls[ i ].anchor}
        );
    }

    $.requestAnimationFrame( function(){
        beginControlsAutoHide( _this );
    } );    // initial fade out

};

$.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype, /** @lends OpenSeadragon.Viewer.prototype */{


    /**
     * @function
     * @return {Boolean}
     */
    isOpen: function () {
        return !!this.source;
    },

    /**
     * A deprecated function, renamed to 'open' to match event name and
     * match current 'close' method.
     * @function
     * @param {String} dzi xml string or the url to a DZI xml document.
     * @return {OpenSeadragon.Viewer} Chainable.
     *
     * @deprecated - use {@link OpenSeadragon.Viewer#open} instead.
     */
    openDzi: function ( dzi ) {
        return this.open( dzi );
    },

    /**
     * A deprecated function, renamed to 'open' to match event name and
     * match current 'close' method.
     * @function
     * @param {String|Object|Function} See OpenSeadragon.Viewer.prototype.open
     * @return {OpenSeadragon.Viewer} Chainable.
     *
     * @deprecated - use {@link OpenSeadragon.Viewer#open} instead.
     */
    openTileSource: function ( tileSource ) {
        return this.open( tileSource );
    },

    /**
     * Open a TileSource object into the viewer.
     *
     * tileSources is a complex option...
     *
     * It can be a string, object, function, or an array of any of these:
     *
     * - A String implies a url used to determine the tileSource implementation
     *      based on the file extension of url. JSONP is implied by *.js,
     *      otherwise the url is retrieved as text and the resulting text is
     *      introspected to determine if its json, xml, or text and parsed.
     * - An Object implies an inline configuration which has a single
     *      property sufficient for being able to determine tileSource
     *      implementation. If the object has a property which is a function
     *      named 'getTileUrl', it is treated as a custom TileSource.
     * @function
     * @param {String|Object|Function}
     * @return {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:open
     * @fires OpenSeadragon.Viewer.event:open-failed
     */
    open: function ( tileSource ) {
        var _this = this;

        _this._hideMessage();

        getTileSourceImplementation( _this, tileSource, function( tileSource ) {
            openTileSource( _this, tileSource );
        }, function( event ) {
            /**
             * Raised when an error occurs loading a TileSource.
             *
             * @event open-failed
             * @memberof OpenSeadragon.Viewer
             * @type {object}
             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
             * @property {String} message
             * @property {String} source
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            _this.raiseEvent( 'open-failed', event );
        });

        return this;
    },


    /**
     * @function
     * @return {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:close
     */
    close: function ( ) {
        if ( this._updateRequestId !== null ) {
            $.cancelAnimationFrame( this._updateRequestId );
            this._updateRequestId = null;
        }

        if ( this.navigator ) {
            this.navigator.close();
        }

        this.clearOverlays();
        this.drawersContainer.innerHTML = "";
        this.overlaysContainer.innerHTML = "";

        this.source     = null;
        this.drawer     = null;
        this.drawers    = [];

        this.viewport   = this.preserveViewport ? this.viewport : null;


        VIEWERS[ this.hash ] = null;
        delete VIEWERS[ this.hash ];

        /**
         * Raised when the viewer is closed (see {@link OpenSeadragon.Viewer#close}).
         *
         * @event close
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        this.raiseEvent( 'close' );

        return this;
    },


    /**
     * Function to destroy the viewer and clean up everything created by
     * OpenSeadragon.
     * @function
     */
    destroy: function( ) {
        this.close();

        this.removeAllHandlers();

        // Go through top element (passed to us) and remove all children
        // Use removeChild to make sure it handles SVG or any non-html
        // also it performs better - http://jsperf.com/innerhtml-vs-removechild/15
        if (this.element){
            while (this.element.firstChild) {
                this.element.removeChild(this.element.firstChild);
            }
        }

        // destroy the mouse trackers
        if (this.keyboardCommandArea){
            this.keyboardCommandArea.innerTracker.destroy();
        }
        if (this.innerTracker){
            this.innerTracker.destroy();
        }
        if (this.outerTracker){
            this.outerTracker.destroy();
        }

        // clear all our references to dom objects
        this.canvas = null;
        this.keyboardCommandArea = null;
        this.container = null;

        // clear our reference to the main element - they will need to pass it in again, creating a new viewer
        this.element = null;
    },


    /**
     * @function
     * @return {Boolean}
     */
    isMouseNavEnabled: function () {
        return this.innerTracker.isTracking();
    },

    /**
     * @function
     * @param {Boolean} enabled - true to enable, false to disable
     * @return {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:mouse-enabled
     */
    setMouseNavEnabled: function( enabled ){
        this.innerTracker.setTracking( enabled );
        /**
         * Raised when mouse/touch navigation is enabled or disabled (see {@link OpenSeadragon.Viewer#setMouseNavEnabled}).
         *
         * @event mouse-enabled
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
         * @property {Boolean} enabled
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        this.raiseEvent( 'mouse-enabled', { enabled: enabled } );
        return this;
    },


    /**
     * @function
     * @return {Boolean}
     */
    areControlsEnabled: function () {
        var enabled = this.controls.length,
            i;
        for( i = 0; i < this.controls.length; i++ ){
            enabled = enabled && this.controls[ i ].isVisibile();
        }
        return enabled;
    },


    /**
     * Shows or hides the controls (e.g. the default navigation buttons).
     *
     * @function
     * @param {Boolean} true to show, false to hide.
     * @return {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:controls-enabled
     */
    setControlsEnabled: function( enabled ) {
        if( enabled ){
            abortControlsAutoHide( this );
        } else {
            beginControlsAutoHide( this );
        }
        /**
         * Raised when the navigation controls are shown or hidden (see {@link OpenSeadragon.Viewer#setControlsEnabled}).
         *
         * @event controls-enabled
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
         * @property {Boolean} enabled
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        this.raiseEvent( 'controls-enabled', { enabled: enabled } );
        return this;
    },


    /**
     * @function
     * @return {Boolean}
     */
    isFullPage: function () {
        return THIS[ this.hash ].fullPage;
    },


    /**
     * Toggle full page mode.
     * @function
     * @param {Boolean} fullPage
     *      If true, enter full page mode.  If false, exit full page mode.
     * @return {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:pre-full-page
     * @fires OpenSeadragon.Viewer.event:full-page
     */
    setFullPage: function( fullPage ) {

        var body = document.body,
            bodyStyle = body.style,
            docStyle = document.documentElement.style,
            _this = this,
            hash,
            nodes,
            i;

        //dont bother modifying the DOM if we are already in full page mode.
        if ( fullPage == this.isFullPage() ) {
            return this;
        }

        var fullPageEventArgs = {
            fullPage: fullPage,
            preventDefaultAction: false
        };
        /**
         * Raised when the viewer is about to change to/from full-page mode (see {@link OpenSeadragon.Viewer#setFullPage}).
         *
         * @event pre-full-page
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
         * @property {Boolean} fullPage - True if entering full-page mode, false if exiting full-page mode.
         * @property {Boolean} preventDefaultAction - Set to true to prevent full-page mode change. Default: false.
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        this.raiseEvent( 'pre-full-page', fullPageEventArgs );
        if ( fullPageEventArgs.preventDefaultAction ) {
            return this;
        }

        if ( fullPage ) {

            this.elementSize = $.getElementSize( this.element );
            this.pageScroll = $.getPageScroll();

            this.elementMargin = this.element.style.margin;
            this.element.style.margin = "0";
            this.elementPadding = this.element.style.padding;
            this.element.style.padding = "0";

            this.bodyMargin = bodyStyle.margin;
            this.docMargin = docStyle.margin;
            bodyStyle.margin = "0";
            docStyle.margin = "0";

            this.bodyPadding = bodyStyle.padding;
            this.docPadding = docStyle.padding;
            bodyStyle.padding = "0";
            docStyle.padding = "0";

            this.bodyWidth = bodyStyle.width;
            this.bodyHeight = bodyStyle.height;
            bodyStyle.width = "100%";
            bodyStyle.height = "100%";

            //when entering full screen on the ipad it wasnt sufficient to leave
            //the body intact as only only the top half of the screen would
            //respond to touch events on the canvas, while the bottom half treated
            //them as touch events on the document body.  Thus we remove and store
            //the bodies elements and replace them when we leave full screen.
            this.previousBody = [];
            THIS[ this.hash ].prevElementParent = this.element.parentNode;
            THIS[ this.hash ].prevNextSibling = this.element.nextSibling;
            THIS[ this.hash ].prevElementWidth = this.element.style.width;
            THIS[ this.hash ].prevElementHeight = this.element.style.height;
            nodes = body.childNodes.length;
            for ( i = 0; i < nodes; i++ ) {
                this.previousBody.push( body.childNodes[ 0 ] );
                body.removeChild( body.childNodes[ 0 ] );
            }

            //If we've got a toolbar, we need to enable the user to use css to
            //preserve it in fullpage mode
            if ( this.toolbar && this.toolbar.element ) {
                //save a reference to the parent so we can put it back
                //in the long run we need a better strategy
                this.toolbar.parentNode = this.toolbar.element.parentNode;
                this.toolbar.nextSibling = this.toolbar.element.nextSibling;
                body.appendChild( this.toolbar.element );

                //Make sure the user has some ability to style the toolbar based
                //on the mode
                $.addClass( this.toolbar.element, 'fullpage' );
            }

            $.addClass( this.element, 'fullpage' );
            body.appendChild( this.element );

            this.element.style.height = $.getWindowSize().y + 'px';
            this.element.style.width = $.getWindowSize().x + 'px';

            if ( this.toolbar && this.toolbar.element ) {
                this.element.style.height = (
                    $.getElementSize( this.element ).y - $.getElementSize( this.toolbar.element ).y
                ) + 'px';
            }

            THIS[ this.hash ].fullPage = true;

            // mouse will be inside container now
            $.delegate( this, onContainerEnter )( {} );

        } else {

            this.element.style.margin = this.elementMargin;
            this.element.style.padding = this.elementPadding;

            bodyStyle.margin = this.bodyMargin;
            docStyle.margin = this.docMargin;

            bodyStyle.padding = this.bodyPadding;
            docStyle.padding = this.docPadding;

            bodyStyle.width = this.bodyWidth;
            bodyStyle.height = this.bodyHeight;

            body.removeChild( this.element );
            nodes = this.previousBody.length;
            for ( i = 0; i < nodes; i++ ) {
                body.appendChild( this.previousBody.shift() );
            }

            $.removeClass( this.element, 'fullpage' );
            THIS[ this.hash ].prevElementParent.insertBefore(
                this.element,
                THIS[ this.hash ].prevNextSibling
            );

            //If we've got a toolbar, we need to enable the user to use css to
            //reset it to its original state
            if ( this.toolbar && this.toolbar.element ) {
                body.removeChild( this.toolbar.element );

                //Make sure the user has some ability to style the toolbar based
                //on the mode
                $.removeClass( this.toolbar.element, 'fullpage' );

                this.toolbar.parentNode.insertBefore(
                    this.toolbar.element,
                    this.toolbar.nextSibling
                );
                delete this.toolbar.parentNode;
                delete this.toolbar.nextSibling;
            }

            this.element.style.width = THIS[ this.hash ].prevElementWidth;
            this.element.style.height = THIS[ this.hash ].prevElementHeight;

            // After exiting fullPage or fullScreen, it can take some time
            // before the browser can actually set the scroll.
            var restoreScrollCounter = 0;
            var restoreScroll = function() {
                $.setPageScroll( _this.pageScroll );
                var pageScroll = $.getPageScroll();
                restoreScrollCounter++;
                if ( restoreScrollCounter < 10 &&
                    pageScroll.x !== _this.pageScroll.x ||
                    pageScroll.y !== _this.pageScroll.y ) {
                    $.requestAnimationFrame( restoreScroll );
                }
            };
            $.requestAnimationFrame( restoreScroll );

            THIS[ this.hash ].fullPage = false;

            // mouse will likely be outside now
            $.delegate( this, onContainerExit )( { } );

        }

        if ( this.navigator && this.viewport ) {
            this.navigator.update( this.viewport );
        }

        /**
         * Raised when the viewer has changed to/from full-page mode (see {@link OpenSeadragon.Viewer#setFullPage}).
         *
         * @event full-page
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
         * @property {Boolean} fullPage - True if changed to full-page mode, false if exited full-page mode.
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        this.raiseEvent( 'full-page', { fullPage: fullPage } );

        return this;
    },

    /**
     * Toggle full screen mode if supported. Toggle full page mode otherwise.
     * @function
     * @param {Boolean} fullScreen
     *      If true, enter full screen mode.  If false, exit full screen mode.
     * @return {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:pre-full-screen
     * @fires OpenSeadragon.Viewer.event:full-screen
     */
    setFullScreen: function( fullScreen ) {
        var _this = this;

        if ( !$.supportsFullScreen ) {
            return this.setFullPage( fullScreen );
        }

        if ( $.isFullScreen() === fullScreen ) {
            return this;
        }

        var fullScreeEventArgs = {
            fullScreen: fullScreen,
            preventDefaultAction: false
        };
        /**
         * Raised when the viewer is about to change to/from full-screen mode (see {@link OpenSeadragon.Viewer#setFullScreen}).
         *
         * @event pre-full-screen
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
         * @property {Boolean} fullScreen - True if entering full-screen mode, false if exiting full-screen mode.
         * @property {Boolean} preventDefaultAction - Set to true to prevent full-screen mode change. Default: false.
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        this.raiseEvent( 'pre-full-screen', fullScreeEventArgs );
        if ( fullScreeEventArgs.preventDefaultAction ) {
            return this;
        }

        if ( fullScreen ) {

            this.setFullPage( true );
            // If the full page mode is not actually entered, we need to prevent
            // the full screen mode.
            if ( !this.isFullPage() ) {
                return this;
            }

            this.fullPageStyleWidth = this.element.style.width;
            this.fullPageStyleHeight = this.element.style.height;
            this.element.style.width = '100%';
            this.element.style.height = '100%';

            var onFullScreenChange = function() {
                var isFullScreen = $.isFullScreen();
                if ( !isFullScreen ) {
                    $.removeEvent( document, $.fullScreenEventName, onFullScreenChange );
                    $.removeEvent( document, $.fullScreenErrorEventName, onFullScreenChange );

                    _this.setFullPage( false );
                    if ( _this.isFullPage() ) {
                        _this.element.style.width = _this.fullPageStyleWidth;
                        _this.element.style.height = _this.fullPageStyleHeight;
                    }
                }
                if ( _this.navigator && _this.viewport ) {
                    _this.navigator.update( _this.viewport );
                }
                /**
                 * Raised when the viewer has changed to/from full-screen mode (see {@link OpenSeadragon.Viewer#setFullScreen}).
                 *
                 * @event full-screen
                 * @memberof OpenSeadragon.Viewer
                 * @type {object}
                 * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
                 * @property {Boolean} fullScreen - True if changed to full-screen mode, false if exited full-screen mode.
                 * @property {?Object} userData - Arbitrary subscriber-defined object.
                 */
                _this.raiseEvent( 'full-screen', { fullScreen: isFullScreen } );
            };
            $.addEvent( document, $.fullScreenEventName, onFullScreenChange );
            $.addEvent( document, $.fullScreenErrorEventName, onFullScreenChange );

            $.requestFullScreen( document.body );

        } else {
            $.exitFullScreen();
        }
        return this;
    },

    /**
     * @function
     * @return {Boolean}
     */
    isVisible: function () {
        return this.container.style.visibility != "hidden";
    },


    /**
     * @function
     * @param {Boolean} visible
     * @return {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:visible
     */
    setVisible: function( visible ){
        this.container.style.visibility = visible ? "" : "hidden";
        /**
         * Raised when the viewer is shown or hidden (see {@link OpenSeadragon.Viewer#setVisible}).
         *
         * @event visible
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
         * @property {Boolean} visible
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        this.raiseEvent( 'visible', { visible: visible } );
        return this;
    },

    /**
     * Add a layer.
     * options.tileSource can be anything that {@link OpenSeadragon.Viewer#open}
     *  supports except arrays of images as layers cannot be sequences.
     * @function
     * @param {Object} options
     * @param {String|Object|Function} options.tileSource The TileSource of the layer.
     * @param {Number} [options.opacity=1] The opacity of the layer.
     * @param {Number} [options.level] The level of the layer. Added on top of
     * all other layers if not specified.
     * @returns {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:add-layer
     * @fires OpenSeadragon.Viewer.event:add-layer-failed
     */
    addLayer: function( options ) {
        var _this = this,
            tileSource = options.tileSource;

        if ( !this.isOpen() ) {
            throw new Error( "An image must be loaded before adding layers." );
        }
        if ( !tileSource ) {
            throw new Error( "No tile source provided as new layer." );
        }
        if ( this.collectionMode ) {
            throw new Error( "Layers not supported in collection mode." );
        }

        function raiseAddLayerFailed( event ) {
             /**
             * Raised when an error occurs while adding a layer.
             * @event add-layer-failed
             * @memberOf OpenSeadragon.Viewer
             * @type {object}
             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
             * @property {String} message
             * @property {String} source
             * @property {Object} options The options passed to the addLayer method.
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            _this.raiseEvent( 'add-layer-failed', event );
        }

        getTileSourceImplementation( this, tileSource, function( tileSource ) {

            if ( tileSource instanceof Array ) {
                raiseAddLayerFailed({
                    message: "Sequences can not be added as layers.",
                    source: tileSource,
                    options: options
                });
                return;
            }

            for ( var i = 0; i < _this.drawers.length; i++ ) {
                var otherAspectRatio = _this.drawers[ i ].source.aspectRatio;
                var diff = otherAspectRatio - tileSource.aspectRatio;
                if ( Math.abs( diff ) > _this.layersAspectRatioEpsilon ) {
                    raiseAddLayerFailed({
                        message: "Aspect ratio mismatch with layer " + i + ".",
                        source: tileSource,
                        options: options
                    });
                    return;
                }
            }

            var drawer = new $.Drawer({
                viewer: _this,
                source: tileSource,
                viewport: _this.viewport,
                element: _this.drawersContainer,
                opacity: options.opacity !== undefined ?
                    options.opacity : _this.opacity,
                maxImageCacheCount: _this.maxImageCacheCount,
                imageLoaderLimit: _this.imageLoaderLimit,
                minZoomImageRatio: _this.minZoomImageRatio,
                wrapHorizontal: _this.wrapHorizontal,
                wrapVertical: _this.wrapVertical,
                immediateRender: _this.immediateRender,
                blendTime: _this.blendTime,
                alwaysBlend: _this.alwaysBlend,
                minPixelRatio: _this.minPixelRatio,
                timeout: _this.timeout,
                debugMode: _this.debugMode,
                debugGridColor: _this.debugGridColor
            });
            _this.drawers.push( drawer );
            if ( options.level !== undefined ) {
                _this.setLayerLevel( drawer, options.level );
            }
            THIS[ _this.hash ].forceRedraw = true;
            /**
             * Raised when a layer is successfully added.
             * @event add-layer
             * @memberOf OpenSeadragon.Viewer
             * @type {object}
             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
             * @property {Object} options The options passed to the addLayer method.
             * @property {OpenSeadragon.Drawer} drawer The layer's underlying drawer.
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            _this.raiseEvent( 'add-layer', {
                options: options,
                drawer: drawer
            });
        }, function( event ) {
            event.options = options;
            raiseAddLayerFailed(event);
        } );

        return this;
    },

    /**
     * Get the layer at the specified level.
     * @param {Number} level The layer to retrieve level.
     * @returns {OpenSeadragon.Drawer} The layer at the specified level.
     */
    getLayerAtLevel: function( level ) {
        if ( level >= this.drawers.length ) {
            throw new Error( "Level bigger than number of layers." );
        }
        return this.drawers[ level ];
    },

    /**
     * Get the level of the layer associated with the given drawer or -1 if not
     * present.
     * @param {OpenSeadragon.Drawer} drawer The underlying drawer of the layer.
     * @returns {Number} The level of the layer or -1 if not present.
     */
    getLevelOfLayer: function( drawer ) {
        return $.indexOf( this.drawers, drawer );
    },

    /**
     * Get the number of layers used.
     * @returns {Number} The number of layers used.
     */
    getLayersCount: function() {
        return this.drawers.length;
    },

    /**
     * Change the level of a layer so that it appears over or under others.
     * @param {OpenSeadragon.Drawer} drawer The underlying drawer of the changing
     * level layer.
     * @param {Number} level The new level
     * @returns {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:layer-level-changed
     */
    setLayerLevel: function( drawer, level ) {
        var oldLevel = this.getLevelOfLayer( drawer );

        if ( level >= this.drawers.length ) {
            throw new Error( "Level bigger than number of layers." );
        }
        if ( level === oldLevel || oldLevel === -1 ) {
            return this;
        }
        if ( level === 0 || oldLevel === 0 ) {
            if ( THIS[ this.hash ].sequenced ) {
                throw new Error( "Cannot reassign base level when in sequence mode." );
            }
            // We need to re-assign the base drawer and the source
            this.drawer = level === 0 ? drawer : this.getLayerAtLevel( level );
            this.source = this.drawer.source;
        }
        this.drawers.splice( oldLevel, 1 );
        this.drawers.splice( level, 0, drawer );
        this.drawersContainer.removeChild( drawer.canvas );
        if ( level === 0 ) {
            var nextLevelCanvas = this.drawers[ 1 ].canvas;
            nextLevelCanvas.parentNode.insertBefore( drawer.canvas,
                nextLevelCanvas );
        } else {
            // Insert right after layer at level - 1
            var prevLevelCanvas = this.drawers[level - 1].canvas;
            prevLevelCanvas.parentNode.insertBefore( drawer.canvas,
                prevLevelCanvas.nextSibling );
        }

        /**
         * Raised when the order of the layers has been changed.
         * @event layer-level-changed
         * @memberOf OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
         * @property {OpenSeadragon.Drawer} drawer - The drawer which level has
         * been changed
         * @property {Number} previousLevel - The previous level of the drawer
         * @property {Number} newLevel - The new level of the drawer
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        this.raiseEvent( 'layer-level-changed', {
            drawer: drawer,
            previousLevel: oldLevel,
            newLevel: level
        } );

        return this;
    },

    /**
     * Remove a layer. If there is only one layer, close the viewer.
     * @function
     * @param {OpenSeadragon.Drawer} drawer The underlying drawer of the layer
     * to remove
     * @returns {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:remove-layer
     */
    removeLayer: function( drawer ) {
        var index = this.drawers.indexOf( drawer );
        if ( index === -1 ) {
            return this;
        }
        if ( index === 0 ) {
            if ( THIS[ this.hash ].sequenced ) {
                throw new Error( "Cannot remove base layer when in sequence mode." );
            }
            if ( this.drawers.length === 1 ) {
                this.close();
                return this;
            }
            this.drawer = this.drawers[ 1 ];
        }

        this.drawers.splice( index, 1 );
        this.drawersContainer.removeChild( drawer.canvas );
        /**
         * Raised when a layer is removed.
         * @event remove-layer
         * @memberOf OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
         * @property {OpenSeadragon.Drawer} drawer The layer's underlying drawer.
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        this.raiseEvent( 'remove-layer', { drawer: drawer } );
        return this;
    },

    /**
     * Force the viewer to redraw its drawers.
     * @returns {OpenSeadragon.Viewer} Chainable.
     */
    forceRedraw: function() {
        THIS[ this.hash ].forceRedraw = true;
        return this;
    },

    /**
     * @function
     * @return {OpenSeadragon.Viewer} Chainable.
     */
    bindSequenceControls: function(){

        //////////////////////////////////////////////////////////////////////////
        // Image Sequence Controls
        //////////////////////////////////////////////////////////////////////////
        var onFocusHandler          = $.delegate( this, onFocus ),
            onBlurHandler           = $.delegate( this, onBlur ),
            onNextHandler           = $.delegate( this, onNext ),
            onPreviousHandler       = $.delegate( this, onPrevious ),
            navImages               = this.navImages,
            useGroup                = true ;

        if( this.showSequenceControl && THIS[ this.hash ].sequenced ){

            if( this.previousButton || this.nextButton ){
                //if we are binding to custom buttons then layout and
                //grouping is the responsibility of the page author
                useGroup = false;
            }

            this.previousButton = new $.Button({
                element:    this.previousButton ? $.getElement( this.previousButton ) : null,
                clickTimeThreshold: this.clickTimeThreshold,
                clickDistThreshold: this.clickDistThreshold,
                tooltip:    $.getString( "Tooltips.PreviousPage" ),
                srcRest:    resolveUrl( this.prefixUrl, navImages.previous.REST ),
                srcGroup:   resolveUrl( this.prefixUrl, navImages.previous.GROUP ),
                srcHover:   resolveUrl( this.prefixUrl, navImages.previous.HOVER ),
                srcDown:    resolveUrl( this.prefixUrl, navImages.previous.DOWN ),
                onRelease:  onPreviousHandler,
                onFocus:    onFocusHandler,
                onBlur:     onBlurHandler
            });

            this.nextButton = new $.Button({
                element:    this.nextButton ? $.getElement( this.nextButton ) : null,
                clickTimeThreshold: this.clickTimeThreshold,
                clickDistThreshold: this.clickDistThreshold,
                tooltip:    $.getString( "Tooltips.NextPage" ),
                srcRest:    resolveUrl( this.prefixUrl, navImages.next.REST ),
                srcGroup:   resolveUrl( this.prefixUrl, navImages.next.GROUP ),
                srcHover:   resolveUrl( this.prefixUrl, navImages.next.HOVER ),
                srcDown:    resolveUrl( this.prefixUrl, navImages.next.DOWN ),
                onRelease:  onNextHandler,
                onFocus:    onFocusHandler,
                onBlur:     onBlurHandler
            });

            if( !this.navPrevNextWrap ){
                this.previousButton.disable();
            }

            if( useGroup ){
                this.paging = new $.ButtonGroup({
                    buttons: [
                        this.previousButton,
                        this.nextButton
                    ],
                    clickTimeThreshold: this.clickTimeThreshold,
                    clickDistThreshold: this.clickDistThreshold
                });

                this.pagingControl = this.paging.element;

                if( this.toolbar ){
                    this.toolbar.addControl(
                        this.pagingControl,
                        {anchor: $.ControlAnchor.BOTTOM_RIGHT}
                    );
                }else{
                    this.addControl(
                        this.pagingControl,
                        {anchor: this.sequenceControlAnchor || $.ControlAnchor.TOP_LEFT}
                    );
                }
            }
        }
        return this;
    },


    /**
     * @function
     * @return {OpenSeadragon.Viewer} Chainable.
     */
    bindStandardControls: function(){
        //////////////////////////////////////////////////////////////////////////
        // Navigation Controls
        //////////////////////////////////////////////////////////////////////////
        var beginZoomingInHandler   = $.delegate( this, beginZoomingIn ),
            endZoomingHandler       = $.delegate( this, endZooming ),
            doSingleZoomInHandler   = $.delegate( this, doSingleZoomIn ),
            beginZoomingOutHandler  = $.delegate( this, beginZoomingOut ),
            doSingleZoomOutHandler  = $.delegate( this, doSingleZoomOut ),
            onHomeHandler           = $.delegate( this, onHome ),
            onFullScreenHandler     = $.delegate( this, onFullScreen ),
            onRotateLeftHandler     = $.delegate( this, onRotateLeft ),
            onRotateRightHandler    = $.delegate( this, onRotateRight ),
            onFocusHandler          = $.delegate( this, onFocus ),
            onBlurHandler           = $.delegate( this, onBlur ),
            navImages               = this.navImages,
            buttons                 = [],
            useGroup                = true ;


        if ( this.showNavigationControl ) {

            if( this.zoomInButton || this.zoomOutButton ||
                this.homeButton || this.fullPageButton ||
                this.rotateLeftButton || this.rotateRightButton ) {
                //if we are binding to custom buttons then layout and
                //grouping is the responsibility of the page author
                useGroup = false;
            }

            if ( this.showZoomControl ) {
                buttons.push( this.zoomInButton = new $.Button({
                    element:    this.zoomInButton ? $.getElement( this.zoomInButton ) : null,
                    clickTimeThreshold: this.clickTimeThreshold,
                    clickDistThreshold: this.clickDistThreshold,
                    tooltip:    $.getString( "Tooltips.ZoomIn" ),
                    srcRest:    resolveUrl( this.prefixUrl, navImages.zoomIn.REST ),
                    srcGroup:   resolveUrl( this.prefixUrl, navImages.zoomIn.GROUP ),
                    srcHover:   resolveUrl( this.prefixUrl, navImages.zoomIn.HOVER ),
                    srcDown:    resolveUrl( this.prefixUrl, navImages.zoomIn.DOWN ),
                    onPress:    beginZoomingInHandler,
                    onRelease:  endZoomingHandler,
                    onClick:    doSingleZoomInHandler,
                    onEnter:    beginZoomingInHandler,
                    onExit:     endZoomingHandler,
                    onFocus:    onFocusHandler,
                    onBlur:     onBlurHandler
                }));

                buttons.push( this.zoomOutButton = new $.Button({
                    element:    this.zoomOutButton ? $.getElement( this.zoomOutButton ) : null,
                    clickTimeThreshold: this.clickTimeThreshold,
                    clickDistThreshold: this.clickDistThreshold,
                    tooltip:    $.getString( "Tooltips.ZoomOut" ),
                    srcRest:    resolveUrl( this.prefixUrl, navImages.zoomOut.REST ),
                    srcGroup:   resolveUrl( this.prefixUrl, navImages.zoomOut.GROUP ),
                    srcHover:   resolveUrl( this.prefixUrl, navImages.zoomOut.HOVER ),
                    srcDown:    resolveUrl( this.prefixUrl, navImages.zoomOut.DOWN ),
                    onPress:    beginZoomingOutHandler,
                    onRelease:  endZoomingHandler,
                    onClick:    doSingleZoomOutHandler,
                    onEnter:    beginZoomingOutHandler,
                    onExit:     endZoomingHandler,
                    onFocus:    onFocusHandler,
                    onBlur:     onBlurHandler
                }));
            }

            if ( this.showHomeControl ) {
                buttons.push( this.homeButton = new $.Button({
                    element:    this.homeButton ? $.getElement( this.homeButton ) : null,
                    clickTimeThreshold: this.clickTimeThreshold,
                    clickDistThreshold: this.clickDistThreshold,
                    tooltip:    $.getString( "Tooltips.Home" ),
                    srcRest:    resolveUrl( this.prefixUrl, navImages.home.REST ),
                    srcGroup:   resolveUrl( this.prefixUrl, navImages.home.GROUP ),
                    srcHover:   resolveUrl( this.prefixUrl, navImages.home.HOVER ),
                    srcDown:    resolveUrl( this.prefixUrl, navImages.home.DOWN ),
                    onRelease:  onHomeHandler,
                    onFocus:    onFocusHandler,
                    onBlur:     onBlurHandler
                }));
            }

            if ( this.showFullPageControl ) {
                buttons.push( this.fullPageButton = new $.Button({
                    element:    this.fullPageButton ? $.getElement( this.fullPageButton ) : null,
                    clickTimeThreshold: this.clickTimeThreshold,
                    clickDistThreshold: this.clickDistThreshold,
                    tooltip:    $.getString( "Tooltips.FullPage" ),
                    srcRest:    resolveUrl( this.prefixUrl, navImages.fullpage.REST ),
                    srcGroup:   resolveUrl( this.prefixUrl, navImages.fullpage.GROUP ),
                    srcHover:   resolveUrl( this.prefixUrl, navImages.fullpage.HOVER ),
                    srcDown:    resolveUrl( this.prefixUrl, navImages.fullpage.DOWN ),
                    onRelease:  onFullScreenHandler,
                    onFocus:    onFocusHandler,
                    onBlur:     onBlurHandler
                }));
            }

            if ( this.showRotationControl ) {
                buttons.push( this.rotateLeftButton = new $.Button({
                    element:    this.rotateLeftButton ? $.getElement( this.rotateLeftButton ) : null,
                    clickTimeThreshold: this.clickTimeThreshold,
                    clickDistThreshold: this.clickDistThreshold,
                    tooltip:    $.getString( "Tooltips.RotateLeft" ),
                    srcRest:    resolveUrl( this.prefixUrl, navImages.rotateleft.REST ),
                    srcGroup:   resolveUrl( this.prefixUrl, navImages.rotateleft.GROUP ),
                    srcHover:   resolveUrl( this.prefixUrl, navImages.rotateleft.HOVER ),
                    srcDown:    resolveUrl( this.prefixUrl, navImages.rotateleft.DOWN ),
                    onRelease:  onRotateLeftHandler,
                    onFocus:    onFocusHandler,
                    onBlur:     onBlurHandler
                }));

                buttons.push( this.rotateRightButton = new $.Button({
                    element:    this.rotateRightButton ? $.getElement( this.rotateRightButton ) : null,
                    clickTimeThreshold: this.clickTimeThreshold,
                    clickDistThreshold: this.clickDistThreshold,
                    tooltip:    $.getString( "Tooltips.RotateRight" ),
                    srcRest:    resolveUrl( this.prefixUrl, navImages.rotateright.REST ),
                    srcGroup:   resolveUrl( this.prefixUrl, navImages.rotateright.GROUP ),
                    srcHover:   resolveUrl( this.prefixUrl, navImages.rotateright.HOVER ),
                    srcDown:    resolveUrl( this.prefixUrl, navImages.rotateright.DOWN ),
                    onRelease:  onRotateRightHandler,
                    onFocus:    onFocusHandler,
                    onBlur:     onBlurHandler
                }));

            }

            if ( useGroup ) {
                this.buttons = new $.ButtonGroup({
                    buttons:            buttons,
                    clickTimeThreshold: this.clickTimeThreshold,
                    clickDistThreshold: this.clickDistThreshold
                });

                this.navControl  = this.buttons.element;
                this.addHandler( 'open', $.delegate( this, lightUp ) );

                if( this.toolbar ){
                    this.toolbar.addControl(
                        this.navControl,
                        {anchor: $.ControlAnchor.TOP_LEFT}
                    );
                } else {
                    this.addControl(
                        this.navControl,
                        {anchor: this.navigationControlAnchor || $.ControlAnchor.TOP_LEFT}
                    );
                }
            }

        }
        return this;
    },

    /**
     * Gets the active page of a sequence
     * @function
     * @return {Number}
     */
    currentPage: function() {
        return THIS[ this.hash ].sequence;
    },

    /**
     * @function
     * @return {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:page
     */
    goToPage: function( page ){
        if( page >= 0 && page < this.tileSources.length ){
            /**
             * Raised when the page is changed on a viewer configured with multiple image sources (see {@link OpenSeadragon.Viewer#goToPage}).
             *
             * @event page
             * @memberof OpenSeadragon.Viewer
             * @type {Object}
             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
             * @property {Number} page - The page index.
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            this.raiseEvent( 'page', { page: page } );

            THIS[ this.hash ].sequence = page;

            this._updateSequenceButtons( page );

            this.open( this.tileSources[ page ] );

            if( this.referenceStrip ){
                this.referenceStrip.setFocus( page );
            }
        }

        return this;
    },

   /**
     * Adds an html element as an overlay to the current viewport.  Useful for
     * highlighting words or areas of interest on an image or other zoomable
     * interface. The overlays added via this method are removed when the viewport
     * is closed which include when changing page.
     * @method
     * @param {Element|String|Object} element - A reference to an element or an id for
     *      the element which will overlayed. Or an Object specifying the configuration for the overlay
     * @param {OpenSeadragon.Point|OpenSeadragon.Rect} location - The point or
     *      rectangle which will be overlayed.
     * @param {OpenSeadragon.OverlayPlacement} placement - The position of the
     *      viewport which the location coordinates will be treated as relative
     *      to.
     * @param {function} onDraw - If supplied the callback is called when the overlay
     *      needs to be drawn. It it the responsibility of the callback to do any drawing/positioning.
     *      It is passed position, size and element.
     * @return {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:add-overlay
     */
    addOverlay: function( element, location, placement, onDraw ) {
        var options;
        if( $.isPlainObject( element ) ){
            options = element;
        } else {
            options = {
                element: element,
                location: location,
                placement: placement,
                onDraw: onDraw
            };
        }

        element = $.getElement( options.element );

        if ( getOverlayIndex( this.currentOverlays, element ) >= 0 ) {
            // they're trying to add a duplicate overlay
            return this;
        }
        this.currentOverlays.push( getOverlayObject( this, options ) );
        THIS[ this.hash ].forceRedraw = true;
        /**
         * Raised when an overlay is added to the viewer (see {@link OpenSeadragon.Viewer#addOverlay}).
         *
         * @event add-overlay
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
         * @property {Element} element - The overlay element.
         * @property {OpenSeadragon.Point|OpenSeadragon.Rect} location
         * @property {OpenSeadragon.OverlayPlacement} placement
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        this.raiseEvent( 'add-overlay', {
            element: element,
            location: options.location,
            placement: options.placement
        });
        return this;
    },

    /**
     * Updates the overlay represented by the reference to the element or
     * element id moving it to the new location, relative to the new placement.
     * @method
     * @param {OpenSeadragon.Point|OpenSeadragon.Rect} location - The point or
     *      rectangle which will be overlayed.
     * @param {OpenSeadragon.OverlayPlacement} placement - The position of the
     *      viewport which the location coordinates will be treated as relative
     *      to.
     * @return {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:update-overlay
     */
    updateOverlay: function( element, location, placement ) {
        var i;

        element = $.getElement( element );
        i = getOverlayIndex( this.currentOverlays, element );

        if ( i >= 0 ) {
            this.currentOverlays[ i ].update( location, placement );
            THIS[ this.hash ].forceRedraw = true;
            /**
             * Raised when an overlay's location or placement changes
             * (see {@link OpenSeadragon.Viewer#updateOverlay}).
             *
             * @event update-overlay
             * @memberof OpenSeadragon.Viewer
             * @type {object}
             * @property {OpenSeadragon.Viewer} eventSource - A reference to the
             * Viewer which raised the event.
             * @property {Element} element
             * @property {OpenSeadragon.Point|OpenSeadragon.Rect} location
             * @property {OpenSeadragon.OverlayPlacement} placement
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            this.raiseEvent( 'update-overlay', {
                element: element,
                location: location,
                placement: placement
            });
        }
        return this;
    },

    /**
     * Removes an overlay identified by the reference element or element id
     * and schedules an update.
     * @method
     * @param {Element|String} element - A reference to the element or an
     *      element id which represent the ovelay content to be removed.
     * @return {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:remove-overlay
     */
    removeOverlay: function( element ) {
        var i;

        element = $.getElement( element );
        i = getOverlayIndex( this.currentOverlays, element );

        if ( i >= 0 ) {
            this.currentOverlays[ i ].destroy();
            this.currentOverlays.splice( i, 1 );
            THIS[ this.hash ].forceRedraw = true;
            /**
             * Raised when an overlay is removed from the viewer
             * (see {@link OpenSeadragon.Viewer#removeOverlay}).
             *
             * @event remove-overlay
             * @memberof OpenSeadragon.Viewer
             * @type {object}
             * @property {OpenSeadragon.Viewer} eventSource - A reference to the
             * Viewer which raised the event.
             * @property {Element} element - The overlay element.
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            this.raiseEvent( 'remove-overlay', {
                element: element
            });
        }
        return this;
    },

    /**
     * Removes all currently configured Overlays from this Viewer and schedules
     * an update.
     * @method
     * @return {OpenSeadragon.Viewer} Chainable.
     * @fires OpenSeadragon.Viewer.event:clear-overlay
     */
    clearOverlays: function() {
        while ( this.currentOverlays.length > 0 ) {
            this.currentOverlays.pop().destroy();
        }
        THIS[ this.hash ].forceRedraw = true;
        /**
         * Raised when all overlays are removed from the viewer (see {@link OpenSeadragon.Drawer#clearOverlays}).
         *
         * @event clear-overlay
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        this.raiseEvent( 'clear-overlay', {} );
        return this;
    },

    /**
     * Updates the sequence buttons.
     * @function OpenSeadragon.Viewer.prototype._updateSequenceButtons
     * @private
     * @param {Number} Sequence Value
     */
    _updateSequenceButtons: function( page ) {

            if ( this.nextButton ) {
                if( ( this.tileSources.length - 1 ) === page ) {
                    //Disable next button
                    if ( !this.navPrevNextWrap ) {
                        this.nextButton.disable();
                    }
                } else {
                    this.nextButton.enable();
                }
            }
            if ( this.previousButton ) {
                if ( page > 0 ) {
                    //Enable previous button
                    this.previousButton.enable();
                } else {
                    if ( !this.navPrevNextWrap ) {
                        this.previousButton.disable();
                    }
                }
            }
      },

    /**
     * Display a message in the viewport
     * @function OpenSeadragon.Viewer.prototype._showMessage
     * @private
     * @param {String} text message
     */
    _showMessage: function ( message ) {
        this._hideMessage();

        var div = $.makeNeutralElement( "div" );
        div.appendChild( document.createTextNode( message ) );

        this.messageDiv = $.makeCenteredNode( div );

        $.addClass(this.messageDiv, "openseadragon-message");

        this.container.appendChild( this.messageDiv );
    },

    /**
     * Hide any currently displayed viewport message
     * @function OpenSeadragon.Viewer.prototype._hideMessage
     * @private
     */
    _hideMessage: function () {
        var div = this.messageDiv;
        if (div) {
            div.parentNode.removeChild(div);
            delete this.messageDiv;
        }
    }
});


/**
 * _getSafeElemSize is like getElementSize(), but refuses to return 0 for x or y,
 * which was causing some calling operations in updateOnce and openTileSource to
 * return NaN.
 * @returns {Point}
 * @private
 */
function _getSafeElemSize (oElement) {
    oElement = $.getElement( oElement );

    return new $.Point(
        (oElement.clientWidth === 0 ? 1 : oElement.clientWidth),
        (oElement.clientHeight === 0 ? 1 : oElement.clientHeight)
    );
}

/**
 * @function
 * @private
 */
function getTileSourceImplementation( viewer, tileSource, successCallback,
    failCallback ) {
    var _this = viewer;

    //allow plain xml strings or json strings to be parsed here
    if ( $.type( tileSource ) == 'string' ) {
        if ( tileSource.match( /\s*<.*/ ) ) {
            tileSource = $.parseXml( tileSource );
        } else if ( tileSource.match( /\s*[\{\[].*/ ) ) {
            /*jshint evil:true*/
            tileSource = eval( '(' + tileSource + ')' );
        }
    }

    setTimeout( function() {
        if ( $.type( tileSource ) == 'string' ) {
            //If its still a string it means it must be a url at this point
            tileSource = new $.TileSource( tileSource, function( event ) {
                successCallback( event.tileSource );
            });
            tileSource.addHandler( 'open-failed', function( event ) {
                failCallback( event );
            } );

        } else if ( $.isPlainObject( tileSource ) || tileSource.nodeType ) {
            if ( $.isFunction( tileSource.getTileUrl ) ) {
                //Custom tile source
                var customTileSource = new $.TileSource( tileSource );
                customTileSource.getTileUrl = tileSource.getTileUrl;
                successCallback( customTileSource );
            } else {
                //inline configuration
                var $TileSource = $.TileSource.determineType( _this, tileSource );
                if ( !$TileSource ) {
                    failCallback( {
                        message: "Unable to load TileSource",
                        source: tileSource
                    });
                    return;
                }
                var options = $TileSource.prototype.configure.apply( _this, [ tileSource ] );
                var readySource = new $TileSource( options );
                successCallback( readySource );
            }
        } else {
            //can assume it's already a tile source implementation
            successCallback( tileSource );
        }
    }, 1 );
}

/**
 * @function
 * @private
 */
function openTileSource( viewer, source ) {
    var i,
        _this = viewer;

    if ( _this.source ) {
        _this.close( );
    }

    THIS[ _this.hash ].prevContainerSize = _getSafeElemSize( _this.container );


    if( _this.collectionMode ){
        _this.source = new $.TileSourceCollection({
            rows: _this.collectionRows,
            layout: _this.collectionLayout,
            tileSize: _this.collectionTileSize,
            tileSources: _this.tileSources,
            tileMargin: _this.collectionTileMargin
        });
        _this.viewport = _this.viewport ? _this.viewport : new $.Viewport({
            collectionMode:         true,
            collectionTileSource:   _this.source,
            containerSize:          THIS[ _this.hash ].prevContainerSize,
            contentSize:            _this.source.dimensions,
            springStiffness:        _this.springStiffness,
            animationTime:          _this.animationTime,
            showNavigator:          false,
            minZoomImageRatio:      1,
            maxZoomPixelRatio:      1,
            viewer:                 _this,
            degrees:                 _this.degrees //,
            //TODO: figure out how to support these in a way that makes sense
            //minZoomLevel:           this.minZoomLevel,
            //maxZoomLevel:           this.maxZoomLevel
        });
    } else {
        if( source ){
            _this.source = source;
        }
        _this.viewport = _this.viewport ? _this.viewport : new $.Viewport({
            containerSize:      THIS[ _this.hash ].prevContainerSize,
            contentSize:        _this.source.dimensions,
            springStiffness:    _this.springStiffness,
            animationTime:      _this.animationTime,
            minZoomImageRatio:  _this.minZoomImageRatio,
            maxZoomPixelRatio:  _this.maxZoomPixelRatio,
            visibilityRatio:    _this.visibilityRatio,
            wrapHorizontal:     _this.wrapHorizontal,
            wrapVertical:       _this.wrapVertical,
            defaultZoomLevel:   _this.defaultZoomLevel,
            minZoomLevel:       _this.minZoomLevel,
            maxZoomLevel:       _this.maxZoomLevel,
            viewer:             _this,
            degrees:            _this.degrees
        });
    }

    if( _this.preserveViewport ){
        _this.viewport.resetContentSize( _this.source.dimensions );
    }

    _this.source.overlays = _this.source.overlays || [];

    _this.drawer = new $.Drawer({
        viewer:             _this,
        source:             _this.source,
        viewport:           _this.viewport,
        element:            _this.drawersContainer,
        opacity:            _this.opacity,
        maxImageCacheCount: _this.maxImageCacheCount,
        imageLoaderLimit:   _this.imageLoaderLimit,
        minZoomImageRatio:  _this.minZoomImageRatio,
        wrapHorizontal:     _this.wrapHorizontal,
        wrapVertical:       _this.wrapVertical,
        immediateRender:    _this.immediateRender,
        blendTime:          _this.blendTime,
        alwaysBlend:        _this.alwaysBlend,
        minPixelRatio:      _this.collectionMode ? 0 : _this.minPixelRatio,
        timeout:            _this.timeout,
        debugMode:          _this.debugMode,
        debugGridColor:     _this.debugGridColor,
        crossOriginPolicy:  _this.crossOriginPolicy
    });
    _this.drawers = [_this.drawer];

    // Now that we have a drawer, see if it supports rotate. If not we need to remove the rotate buttons
    if (!_this.drawer.canRotate()) {
        // Disable/remove the rotate left/right buttons since they aren't supported
        if (_this.rotateLeft) {
            i = _this.buttons.buttons.indexOf(_this.rotateLeft);
            _this.buttons.buttons.splice(i, 1);
            _this.buttons.element.removeChild(_this.rotateLeft.element);
        }
        if (_this.rotateRight) {
            i = _this.buttons.buttons.indexOf(_this.rotateRight);
            _this.buttons.buttons.splice(i, 1);
            _this.buttons.element.removeChild(_this.rotateRight.element);
        }
    }

    //Instantiate a navigator if configured
    if ( _this.showNavigator  && !_this.collectionMode ){
        // Note: By passing the fully parsed source, the navigator doesn't
        // have to load it again.
        if ( _this.navigator ) {
            _this.navigator.open( source );
        } else {
            _this.navigator = new $.Navigator({
                id:                _this.navigatorId,
                position:          _this.navigatorPosition,
                sizeRatio:         _this.navigatorSizeRatio,
                maintainSizeRatio: _this.navigatorMaintainSizeRatio,
                top:               _this.navigatorTop,
                left:              _this.navigatorLeft,
                width:             _this.navigatorWidth,
                height:            _this.navigatorHeight,
                autoResize:        _this.navigatorAutoResize,
                tileSources:       source,
                tileHost:          _this.tileHost,
                prefixUrl:         _this.prefixUrl,
                viewer:            _this
            });
        }
    }

    //Instantiate a referencestrip if configured
    if ( _this.showReferenceStrip  && !_this.referenceStrip ){
        _this.referenceStrip = new $.ReferenceStrip({
            id:              _this.referenceStripElement,
            position:        _this.referenceStripPosition,
            sizeRatio:       _this.referenceStripSizeRatio,
            scroll:          _this.referenceStripScroll,
            height:          _this.referenceStripHeight,
            width:           _this.referenceStripWidth,
            backgroundColor: _this.referenceStripBackgroundColor,
            tileSources:     _this.tileSources,
            tileHost:        _this.tileHost,
            prefixUrl:       _this.prefixUrl,
            viewer:          _this
        });
    }

    //this.profiler = new $.Profiler();

    THIS[ _this.hash ].animating = false;
    THIS[ _this.hash ].forceRedraw = true;
    _this._updateRequestId = scheduleUpdate( _this, updateMulti );

    VIEWERS[ _this.hash ] = _this;

    loadOverlays( _this );

    /**
     * Raised when the viewer has opened and loaded one or more TileSources.
     *
     * @event open
     * @memberof OpenSeadragon.Viewer
     * @type {object}
     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
     * @property {OpenSeadragon.TileSource} source
     * @property {?Object} userData - Arbitrary subscriber-defined object.
     */
    _this.raiseEvent( 'open', { source: source } );

    return _this;
}

function loadOverlays( _this ) {
    _this.currentOverlays = [];
    for ( var i = 0; i < _this.overlays.length; i++ ) {
        _this.currentOverlays[ i ] = getOverlayObject( _this, _this.overlays[ i ] );
    }
    for ( var j = 0; j < _this.source.overlays.length; j++ ) {
        _this.currentOverlays[ i + j ] =
            getOverlayObject( _this, _this.source.overlays[ j ] );
    }
}

function getOverlayObject( viewer, overlay ) {
    if ( overlay instanceof $.Overlay ) {
        return overlay;
    }

    var element = null;
    if ( overlay.element ) {
        element = $.getElement( overlay.element );
    } else {
        var id = overlay.id ?
            overlay.id :
            "openseadragon-overlay-" + Math.floor( Math.random() * 10000000 );

        element = $.getElement( overlay.id );
        if ( !element ) {
            element         = document.createElement( "a" );
            element.href    = "#/overlay/" + id;
        }
        element.id = id;
        $.addClass( element, overlay.className ?
            overlay.className :
            "openseadragon-overlay"
        );
    }

    var location = overlay.location;
    if ( !location ) {
        if ( overlay.width && overlay.height ) {
            location = overlay.px !== undefined ?
                viewer.viewport.imageToViewportRectangle( new $.Rect(
                    overlay.px,
                    overlay.py,
                    overlay.width,
                    overlay.height
                ) ) :
                new $.Rect(
                    overlay.x,
                    overlay.y,
                    overlay.width,
                    overlay.height
                );
        } else {
            location = overlay.px !== undefined ?
                viewer.viewport.imageToViewportCoordinates( new $.Point(
                    overlay.px,
                    overlay.py
                ) ) :
                new $.Point(
                    overlay.x,
                    overlay.y
                );
        }
    }

    var placement = overlay.placement;
    if ( placement && ( $.type( placement ) === "string" ) ) {
        placement = $.OverlayPlacement[ overlay.placement.toUpperCase() ];
    }

    return new $.Overlay({
        element: element,
        location: location,
        placement: placement,
        onDraw: overlay.onDraw,
        checkResize: overlay.checkResize
    });
}

/**
 * @private
 * @inner
 * Determines the index of the given overlay in the given overlays array.
 */
function getOverlayIndex( overlays, element ) {
    var i;
    for ( i = overlays.length - 1; i >= 0; i-- ) {
        if ( overlays[ i ].element === element ) {
            return i;
        }
    }

    return -1;
}

function drawOverlays( viewport, overlays, container ) {
    var i,
        length = overlays.length;
    for ( i = 0; i < length; i++ ) {
        overlays[ i ].drawHTML( container, viewport );
    }
}

///////////////////////////////////////////////////////////////////////////////
// Schedulers provide the general engine for animation
///////////////////////////////////////////////////////////////////////////////
function scheduleUpdate( viewer, updateFunc ){
    return $.requestAnimationFrame( function(){
        updateFunc( viewer );
    } );
}


//provides a sequence in the fade animation
function scheduleControlsFade( viewer ) {
    $.requestAnimationFrame( function(){
        updateControlsFade( viewer );
    });
}


//initiates an animation to hide the controls
function beginControlsAutoHide( viewer ) {
    if ( !viewer.autoHideControls ) {
        return;
    }
    viewer.controlsShouldFade = true;
    viewer.controlsFadeBeginTime =
        $.now() +
        viewer.controlsFadeDelay;

    window.setTimeout( function(){
        scheduleControlsFade( viewer );
    }, viewer.controlsFadeDelay );
}


//determines if fade animation is done or continues the animation
function updateControlsFade( viewer ) {
    var currentTime,
        deltaTime,
        opacity,
        i;
    if ( viewer.controlsShouldFade ) {
        currentTime = $.now();
        deltaTime = currentTime - viewer.controlsFadeBeginTime;
        opacity = 1.0 - deltaTime / viewer.controlsFadeLength;

        opacity = Math.min( 1.0, opacity );
        opacity = Math.max( 0.0, opacity );

        for ( i = viewer.controls.length - 1; i >= 0; i--) {
            if (viewer.controls[ i ].autoFade) {
                viewer.controls[ i ].setOpacity( opacity );
            }
        }

        if ( opacity > 0 ) {
            // fade again
            scheduleControlsFade( viewer );
        }
    }
}


//stop the fade animation on the controls and show them
function abortControlsAutoHide( viewer ) {
    var i;
    viewer.controlsShouldFade = false;
    for ( i = viewer.controls.length - 1; i >= 0; i-- ) {
        viewer.controls[ i ].setOpacity( 1.0 );
    }
}


///////////////////////////////////////////////////////////////////////////////
// Default view event handlers.
///////////////////////////////////////////////////////////////////////////////
function onFocus(){
    abortControlsAutoHide( this );
}

function onBlur(){
    beginControlsAutoHide( this );

}

function onCanvasClick( event ) {
    var zoomPerClick,
        factor;
    if ( !event.preventDefaultAction && this.viewport && event.quick ) {    // ignore clicks where mouse moved
        zoomPerClick = this.zoomPerClick;
        factor = event.shift ? 1.0 / zoomPerClick : zoomPerClick;
        this.viewport.zoomBy(
            factor,
            this.viewport.pointFromPixel( event.position, true )
        );
        this.viewport.applyConstraints();
    }
    /**
     * Raised when a mouse press/release or touch/remove occurs on the {@link OpenSeadragon.Viewer#canvas} element.
     *
     * @event canvas-click
     * @memberof OpenSeadragon.Viewer
     * @type {object}
     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.
     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.
     * @property {Boolean} quick - True only if the clickDistThreshold and clickDeltaThreshold are both passed. Useful for differentiating between clicks and drags.
     * @property {Boolean} shift - True if the shift key was pressed during this event.
     * @property {Object} originalEvent - The original DOM event.
     * @property {?Object} userData - Arbitrary subscriber-defined object.
     */
    this.raiseEvent( 'canvas-click', {
        tracker: event.eventSource,
        position: event.position,
        quick: event.quick,
        shift: event.shift,
        originalEvent: event.originalEvent
    });
}

function onCanvasDrag( event ) {
    if ( !event.preventDefaultAction && this.viewport ) {
        if( !this.panHorizontal ){
            event.delta.x = 0;
        }
        if( !this.panVertical ){
            event.delta.y = 0;
        }
        this.viewport.panBy(
            this.viewport.deltaPointsFromPixels(
                event.delta.negate()
            )
        );
        if( this.constrainDuringPan ){
            this.viewport.applyConstraints();
        }
    }
    /**
     * Raised when a mouse or touch drag operation occurs on the {@link OpenSeadragon.Viewer#canvas} element.
     *
     * @event canvas-drag
     * @memberof OpenSeadragon.Viewer
     * @type {object}
     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.
     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.
     * @property {OpenSeadragon.Point} delta - The x,y components of the difference between start drag and end drag.
     * @property {Boolean} shift - True if the shift key was pressed during this event.
     * @property {Object} originalEvent - The original DOM event.
     * @property {?Object} userData - Arbitrary subscriber-defined object.
     */
    this.raiseEvent( 'canvas-drag', {
        tracker: event.eventSource,
        position: event.position,
        delta: event.delta,
        shift: event.shift,
        originalEvent: event.originalEvent
    });
}

function onCanvasRelease( event ) {
    if ( event.insideElementPressed && this.viewport ) {
        this.viewport.applyConstraints();
    }
    /**
     * Raised when the mouse button is released or touch ends on the {@link OpenSeadragon.Viewer#canvas} element.
     *
     * @event canvas-release
     * @memberof OpenSeadragon.Viewer
     * @type {object}
     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.
     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.
     * @property {Boolean} insideElementPressed - True if the left mouse button is currently being pressed and was initiated inside the tracked element, otherwise false.
     * @property {Boolean} insideElementReleased - True if the cursor still inside the tracked element when the button was released.
     * @property {Object} originalEvent - The original DOM event.
     * @property {?Object} userData - Arbitrary subscriber-defined object.
     */
    this.raiseEvent( 'canvas-release', {
        tracker: event.eventSource,
        position: event.position,
        insideElementPressed: event.insideElementPressed,
        insideElementReleased: event.insideElementReleased,
        originalEvent: event.originalEvent
    });
}

function onCanvasScroll( event ) {
    var factor;
    if ( !event.preventDefaultAction && this.viewport ) {
        factor = Math.pow( this.zoomPerScroll, event.scroll );
        this.viewport.zoomBy(
            factor,
            this.viewport.pointFromPixel( event.position, true )
        );
        this.viewport.applyConstraints();
    }
    /**
     * Raised when a scroll event occurs on the {@link OpenSeadragon.Viewer#canvas} element (mouse wheel, touch pinch, etc.).
     *
     * @event canvas-scroll
     * @memberof OpenSeadragon.Viewer
     * @type {object}
     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.
     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.
     * @property {Number} scroll - The scroll delta for the event.
     * @property {Boolean} shift - True if the shift key was pressed during this event.
     * @property {Object} originalEvent - The original DOM event.
     * @property {?Object} userData - Arbitrary subscriber-defined object.
     */
    this.raiseEvent( 'canvas-scroll', {
        tracker: event.eventSource,
        position: event.position,
        scroll: event.scroll,
        shift: event.shift,
        originalEvent: event.originalEvent
    });
    //cancels event
    return false;
}

function onContainerExit( event ) {
    if ( !event.insideElementPressed ) {
        THIS[ this.hash ].mouseInside = false;
        if ( !THIS[ this.hash ].animating ) {
            beginControlsAutoHide( this );
        }
    }
    /**
     * Raised when the cursor leaves the {@link OpenSeadragon.Viewer#container} element.
     *
     * @event container-exit
     * @memberof OpenSeadragon.Viewer
     * @type {object}
     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.
     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.
     * @property {Boolean} insideElementPressed - True if the left mouse button is currently being pressed and was initiated inside the tracked element, otherwise false.
     * @property {Boolean} buttonDownAny - Was the button down anywhere in the screen during the event.
     * @property {Object} originalEvent - The original DOM event.
     * @property {?Object} userData - Arbitrary subscriber-defined object.
     */
    this.raiseEvent( 'container-exit', {
        tracker: event.eventSource,
        position: event.position,
        insideElementPressed: event.insideElementPressed,
        buttonDownAny: event.buttonDownAny,
        originalEvent: event.originalEvent
    });
}

function onContainerRelease( event ) {
    if ( !event.insideElementReleased ) {
        THIS[ this.hash ].mouseInside = false;
        if ( !THIS[ this.hash ].animating ) {
            beginControlsAutoHide( this );
        }
    }
    /**
     * Raised when the mouse button is released or touch ends on the {@link OpenSeadragon.Viewer#container} element.
     *
     * @event container-release
     * @memberof OpenSeadragon.Viewer
     * @type {object}
     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.
     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.
     * @property {Boolean} insideElementPressed - True if the left mouse button is currently being pressed and was initiated inside the tracked element, otherwise false.
     * @property {Boolean} insideElementReleased - True if the cursor still inside the tracked element when the button was released.
     * @property {Object} originalEvent - The original DOM event.
     * @property {?Object} userData - Arbitrary subscriber-defined object.
     */
    this.raiseEvent( 'container-release', {
        tracker: event.eventSource,
        position: event.position,
        insideElementPressed: event.insideElementPressed,
        insideElementReleased: event.insideElementReleased,
        originalEvent: event.originalEvent
    });
}

function onContainerEnter( event ) {
    THIS[ this.hash ].mouseInside = true;
    abortControlsAutoHide( this );
    /**
     * Raised when the cursor enters the {@link OpenSeadragon.Viewer#container} element.
     *
     * @event container-enter
     * @memberof OpenSeadragon.Viewer
     * @type {object}
     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.
     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.
     * @property {Boolean} insideElementPressed - True if the left mouse button is currently being pressed and was initiated inside the tracked element, otherwise false.
     * @property {Boolean} buttonDownAny - Was the button down anywhere in the screen during the event.
     * @property {Object} originalEvent - The original DOM event.
     * @property {?Object} userData - Arbitrary subscriber-defined object.
     */
    this.raiseEvent( 'container-enter', {
        tracker: event.eventSource,
        position: event.position,
        insideElementPressed: event.insideElementPressed,
        buttonDownAny: event.buttonDownAny,
        originalEvent: event.originalEvent
    });
}


///////////////////////////////////////////////////////////////////////////////
// Page update routines ( aka Views - for future reference )
///////////////////////////////////////////////////////////////////////////////

function updateMulti( viewer ) {
    if ( !viewer.source ) {
        viewer._updateRequestId = null;
        return;
    }

    updateOnce( viewer );

    // Request the next frame, unless we've been closed during the updateOnce()
    if ( viewer.source ) {
        viewer._updateRequestId = scheduleUpdate( viewer, updateMulti );
    }
}

function updateOnce( viewer ) {

    var containerSize,
        animated;

    if ( !viewer.source ) {
        return;
    }

    //viewer.profiler.beginUpdate();

    if ( viewer.autoResize ) {
        containerSize = _getSafeElemSize( viewer.canvas );
        if ( !containerSize.equals( THIS[ viewer.hash ].prevContainerSize ) ) {
            // maintain image position
            var oldBounds = viewer.viewport.getBounds();
            var oldCenter = viewer.viewport.getCenter();
            resizeViewportAndRecenter(viewer, containerSize, oldBounds, oldCenter);
            THIS[ viewer.hash ].prevContainerSize = containerSize;
            THIS[ viewer.hash ].forceRedraw = true;
        }
    }

    animated = viewer.viewport.update();

    if( viewer.referenceStrip ){
        animated = viewer.referenceStrip.update( viewer.viewport ) || animated;
    }

    if ( !THIS[ viewer.hash ].animating && animated ) {
        /**
         * Raised when any spring animation starts (zoom, pan, etc.).
         *
         * @event animation-start
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        viewer.raiseEvent( "animation-start" );
        abortControlsAutoHide( viewer );
    }

    if ( animated ) {
        updateDrawers( viewer );
        drawOverlays( viewer.viewport, viewer.currentOverlays, viewer.overlaysContainer );
        if( viewer.navigator ){
            viewer.navigator.update( viewer.viewport );
        }
        /**
         * Raised when any spring animation update occurs (zoom, pan, etc.).
         *
         * @event animation
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        viewer.raiseEvent( "animation" );
    } else if ( THIS[ viewer.hash ].forceRedraw || drawersNeedUpdate( viewer ) ) {
        updateDrawers( viewer );
        drawOverlays( viewer.viewport, viewer.currentOverlays, viewer.overlaysContainer );
        if( viewer.navigator ){
            viewer.navigator.update( viewer.viewport );
        }
        THIS[ viewer.hash ].forceRedraw = false;
    }

    if ( THIS[ viewer.hash ].animating && !animated ) {
        /**
         * Raised when any spring animation ends (zoom, pan, etc.).
         *
         * @event animation-finish
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        viewer.raiseEvent( "animation-finish" );

        if ( !THIS[ viewer.hash ].mouseInside ) {
            beginControlsAutoHide( viewer );
        }
    }

    THIS[ viewer.hash ].animating = animated;

    //viewer.profiler.endUpdate();
}

// This function resizes the viewport and recenters the image
// as it was before resizing.
// TODO: better adjust width and height. The new width and height
// should depend on the image dimensions and on the dimensions
// of the viewport before and after switching mode.
function resizeViewportAndRecenter( viewer, containerSize, oldBounds, oldCenter ) {
    var viewport = viewer.viewport;

    viewport.resize( containerSize, true );

    // We try to remove blanks as much as possible
    var imageHeight = 1 / viewer.source.aspectRatio;
    var newWidth = oldBounds.width <= 1 ? oldBounds.width : 1;
    var newHeight = oldBounds.height <= imageHeight ?
        oldBounds.height : imageHeight;

    var newBounds = new $.Rect(
        oldCenter.x - ( newWidth / 2.0 ),
        oldCenter.y - ( newHeight / 2.0 ),
        newWidth,
        newHeight
        );
    viewport.fitBounds( newBounds, true );
}

function updateDrawers( viewer ) {
    for (var i = 0; i < viewer.drawers.length; i++ ) {
        viewer.drawers[i].update();
    }
}

function drawersNeedUpdate( viewer ) {
    for (var i = 0; i < viewer.drawers.length; i++ ) {
        if (viewer.drawers[i].needsUpdate()) {
            return true;
        }
    }
    return false;
}

///////////////////////////////////////////////////////////////////////////////
// Navigation Controls
///////////////////////////////////////////////////////////////////////////////
function resolveUrl( prefix, url ) {
    return prefix ? prefix + url : url;
}


function beginZoomingIn() {
    THIS[ this.hash ].lastZoomTime = $.now();
    THIS[ this.hash ].zoomFactor = this.zoomPerSecond;
    THIS[ this.hash ].zooming = true;
    scheduleZoom( this );
}


function beginZoomingOut() {
    THIS[ this.hash ].lastZoomTime = $.now();
    THIS[ this.hash ].zoomFactor = 1.0 / this.zoomPerSecond;
    THIS[ this.hash ].zooming = true;
    scheduleZoom( this );
}


function endZooming() {
    THIS[ this.hash ].zooming = false;
}


function scheduleZoom( viewer ) {
    $.requestAnimationFrame( $.delegate( viewer, doZoom ) );
}


function doZoom() {
    var currentTime,
        deltaTime,
        adjustedFactor;

    if ( THIS[ this.hash ].zooming && this.viewport) {
        currentTime     = $.now();
        deltaTime       = currentTime - THIS[ this.hash ].lastZoomTime;
        adjustedFactor  = Math.pow( THIS[ this.hash ].zoomFactor, deltaTime / 1000 );

        this.viewport.zoomBy( adjustedFactor );
        this.viewport.applyConstraints();
        THIS[ this.hash ].lastZoomTime = currentTime;
        scheduleZoom( this );
    }
}


function doSingleZoomIn() {
    if ( this.viewport ) {
        THIS[ this.hash ].zooming = false;
        this.viewport.zoomBy(
            this.zoomPerClick / 1.0
        );
        this.viewport.applyConstraints();
    }
}


function doSingleZoomOut() {
    if ( this.viewport ) {
        THIS[ this.hash ].zooming = false;
        this.viewport.zoomBy(
            1.0 / this.zoomPerClick
        );
        this.viewport.applyConstraints();
    }
}


function lightUp() {
    this.buttons.emulateEnter();
    this.buttons.emulateExit();
}


function onHome() {
    if ( this.viewport ) {
        this.viewport.goHome();
    }
}


function onFullScreen() {
    if ( this.isFullPage() && !$.isFullScreen() ) {
        // Is fullPage but not fullScreen
        this.setFullPage( false );
    } else {
        this.setFullScreen( !this.isFullPage() );
    }
    // correct for no mouseout event on change
    if ( this.buttons ) {
        this.buttons.emulateExit();
    }
    this.fullPageButton.element.focus();
    if ( this.viewport ) {
        this.viewport.applyConstraints();
    }
}

/**
 * Note: The current rotation feature is limited to 90 degree turns.
 */
function onRotateLeft() {
    if ( this.viewport ) {
        var currRotation = this.viewport.getRotation();
        if (currRotation === 0) {
            currRotation = 270;
        }
        else {
            currRotation -= 90;
        }
        this.viewport.setRotation(currRotation);
    }
}

/**
 * Note: The current rotation feature is limited to 90 degree turns.
 */
function onRotateRight() {
    if ( this.viewport ) {
        var currRotation = this.viewport.getRotation();
        if (currRotation === 270) {
            currRotation = 0;
        }
        else {
            currRotation += 90;
        }
        this.viewport.setRotation(currRotation);
    }
}


function onPrevious(){
    var previous = THIS[ this.hash ].sequence - 1;
    if(this.navPrevNextWrap && previous < 0){
        previous += this.tileSources.length;
    }
    this.goToPage( previous );
}


function onNext(){
    var next = THIS[ this.hash ].sequence + 1;
    if(this.navPrevNextWrap && next >= this.tileSources.length){
        next = 0;
    }
    this.goToPage( next );
}


}( OpenSeadragon ));

/*
 * OpenSeadragon - Navigator
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

/**
 * @class Navigator
 * @classdesc The Navigator provides a small view of the current image as fixed
 * while representing the viewport as a moving box serving as a frame
 * of reference in the larger viewport as to which portion of the image
 * is currently being examined.  The navigator's viewport can be interacted
 * with using the keyboard or the mouse.
 *
 * @memberof OpenSeadragon
 * @extends OpenSeadragon.Viewer
 * @extends OpenSeadragon.EventSource
 * @param {Object} options
 */
$.Navigator = function( options ){

    var viewer      = options.viewer,
        viewerSize,
        navigatorSize,
        unneededElement;

    //We may need to create a new element and id if they did not
    //provide the id for the existing element
    if( !options.id ){
        options.id              = 'navigator-' + $.now();
        this.element            = $.makeNeutralElement( "div" );
        options.controlOptions  = {
            anchor:           $.ControlAnchor.TOP_RIGHT,
            attachToViewer:   true,
            autoFade:         true
        };

        if( options.position ){
            if( 'BOTTOM_RIGHT' == options.position ){
               options.controlOptions.anchor = $.ControlAnchor.BOTTOM_RIGHT;
            } else if( 'BOTTOM_LEFT' == options.position ){
               options.controlOptions.anchor = $.ControlAnchor.BOTTOM_LEFT;
            } else if( 'TOP_RIGHT' == options.position ){
               options.controlOptions.anchor = $.ControlAnchor.TOP_RIGHT;
            } else if( 'TOP_LEFT' == options.position ){
               options.controlOptions.anchor = $.ControlAnchor.TOP_LEFT;
            } else if( 'ABSOLUTE' == options.position ){
               options.controlOptions.anchor = $.ControlAnchor.ABSOLUTE;
               options.controlOptions.top = options.top;
               options.controlOptions.left = options.left;
               options.controlOptions.height = options.height;
               options.controlOptions.width = options.width;
            }
        }
        
    } else {
        this.element            = document.getElementById( options.id );
        options.controlOptions  = {
            anchor:           $.ControlAnchor.NONE,
            attachToViewer:   false,
            autoFade:         false
        };
    }
    this.element.id         = options.id;
    this.element.className  += ' navigator';

    options = $.extend( true, {
        sizeRatio:     $.DEFAULT_SETTINGS.navigatorSizeRatio
    }, options, {
        element:                this.element,
        //These need to be overridden to prevent recursion since
        //the navigator is a viewer and a viewer has a navigator
        showNavigator:          false,
        mouseNavEnabled:        false,
        showNavigationControl:  false,
        showSequenceControl:    false,
        immediateRender:        true,
        blendTime:              0,
        animationTime:          0,
        autoResize:             options.autoResize
    });

    options.minPixelRatio = this.minPixelRatio = viewer.minPixelRatio;

    this.borderWidth = 2;
    //At some browser magnification levels the display regions lines up correctly, but at some there appears to
    //be a one pixel gap.
    this.fudge = new $.Point(1, 1);
    this.totalBorderWidths = new $.Point(this.borderWidth*2, this.borderWidth*2).minus(this.fudge);


    if ( options.controlOptions.anchor != $.ControlAnchor.NONE ) {
        (function( style, borderWidth ){
            style.margin        = '0px';
            style.border        = borderWidth + 'px solid #555';
            style.padding       = '0px';
            style.background    = '#000';
            style.opacity       = 0.8;
            style.overflow      = 'hidden';
        }( this.element.style, this.borderWidth));
    }

    this.displayRegion           = $.makeNeutralElement( "div" );
    this.displayRegion.id        = this.element.id + '-displayregion';
    this.displayRegion.className = 'displayregion';

    (function( style, borderWidth ){
        style.position      = 'relative';
        style.top           = '0px';
        style.left          = '0px';
        style.fontSize      = '0px';
        style.overflow      = 'hidden';
        style.border        = borderWidth + 'px solid #900';
        style.margin        = '0px';
        style.padding       = '0px';
        //TODO: IE doesnt like this property being set
        //try{ style.outline  = '2px auto #909'; }catch(e){/*ignore*/}

        style.background    = 'transparent';

        // We use square bracket notation on the statement below, because float is a keyword.
        // This is important for the Google Closure compiler, if nothing else.
        /*jshint sub:true */
        style['float']      = 'left'; //Webkit

        style.cssFloat      = 'left'; //Firefox
        style.styleFloat    = 'left'; //IE
        style.zIndex        = 999999999;
        style.cursor        = 'default';
    }( this.displayRegion.style, this.borderWidth ));


    this.element.innerTracker = new $.MouseTracker({
        element:         this.element,
        dragHandler:     $.delegate( this, onCanvasDrag ),
        clickHandler:    $.delegate( this, onCanvasClick ),
        releaseHandler:  $.delegate( this, onCanvasRelease ),
        scrollHandler:   $.delegate( this, onCanvasScroll )
    }).setTracking( true );

    /*this.displayRegion.outerTracker = new $.MouseTracker({
        element:            this.container,
        clickTimeThreshold: this.clickTimeThreshold,
        clickDistThreshold: this.clickDistThreshold,
        enterHandler:       $.delegate( this, onContainerEnter ),
        exitHandler:        $.delegate( this, onContainerExit ),
        releaseHandler:     $.delegate( this, onContainerRelease )
    }).setTracking( this.mouseNavEnabled ? true : false ); // always tracking*/


    viewer.addControl(
        this.element,
        options.controlOptions
    );

    if ( options.controlOptions.anchor != $.ControlAnchor.ABSOLUTE && options.controlOptions.anchor != $.ControlAnchor.NONE ) {
        if ( options.width && options.height ) {
            this.element.style.height = typeof ( options.height )  == "number" ? ( options.height + 'px' ) : options.height;
            this.element.style.width  = typeof ( options.width )  == "number" ? ( options.width + 'px' ) : options.width;
        } else {
            viewerSize = $.getElementSize( viewer.element );
            this.element.style.height = ( viewerSize.y * options.sizeRatio ) + 'px';
            this.element.style.width  = ( viewerSize.x * options.sizeRatio ) + 'px';
            this.oldViewerSize = viewerSize;
        }
        navigatorSize = $.getElementSize( this.element );
        this.elementArea = navigatorSize.x * navigatorSize.y;
    }

    this.oldContainerSize = new $.Point( 0, 0 );

    $.Viewer.apply( this, [ options ] );

    this.element.getElementsByTagName( 'div' )[0].appendChild( this.displayRegion );
    unneededElement = this.element.getElementsByTagName('textarea')[0];
    if (unneededElement) {
        unneededElement.parentNode.removeChild(unneededElement);
    }

};

$.extend( $.Navigator.prototype, $.EventSource.prototype, $.Viewer.prototype, /** @lends OpenSeadragon.Navigator.prototype */{

    /**
     * Used to notify the navigator when its size has changed. 
     * Especially useful when {@link OpenSeadragon.Options}.navigatorAutoResize is set to false and the navigator is resizable.
     * @function
     */
    updateSize: function () {
        if ( this.viewport ) {
            var containerSize = new $.Point(
                    (this.container.clientWidth === 0 ? 1 : this.container.clientWidth),
                    (this.container.clientHeight === 0 ? 1 : this.container.clientHeight)
                );
            if ( !containerSize.equals( this.oldContainerSize ) ) {
                var oldBounds = this.viewport.getBounds();
                var oldCenter = this.viewport.getCenter();
                this.viewport.resize( containerSize, true );
                var imageHeight = 1 / this.source.aspectRatio;
                var newWidth = oldBounds.width <= 1 ? oldBounds.width : 1;
                var newHeight = oldBounds.height <= imageHeight ?
                    oldBounds.height : imageHeight;
                var newBounds = new $.Rect(
                    oldCenter.x - ( newWidth / 2.0 ),
                    oldCenter.y - ( newHeight / 2.0 ),
                    newWidth,
                    newHeight
                    );
                this.viewport.fitBounds( newBounds, true );
                this.oldContainerSize = containerSize;
                this.drawer.update();
            }
        }
    },

    /**
     * Used to update the navigator minimap's viewport rectangle when a change in the viewer's viewport occurs.
     * @function
     * @param {OpenSeadragon.Viewport} The viewport this navigator is tracking.
     */
    update: function( viewport ) {

        var viewerSize,
            newWidth,
            newHeight,
            bounds,
            topleft,
            bottomright;

        viewerSize = $.getElementSize( this.viewer.element );
        if ( !viewerSize.equals( this.oldViewerSize ) ) {
            this.oldViewerSize = viewerSize;
            if ( this.maintainSizeRatio ) {
                newWidth  = viewerSize.x * this.sizeRatio;
                newHeight = viewerSize.y * this.sizeRatio;
            }
            else {
                newWidth = Math.sqrt(this.elementArea * (viewerSize.x / viewerSize.y));
                newHeight = this.elementArea / newWidth;
            }
            this.element.style.width  = newWidth + 'px';
            this.element.style.height = newHeight + 'px';
            this.updateSize();
        }

        if( viewport && this.viewport ) {
            bounds      = viewport.getBounds( true );
            topleft     = this.viewport.pixelFromPoint( bounds.getTopLeft(), false );
            bottomright = this.viewport.pixelFromPoint( bounds.getBottomRight(), false ).minus( this.totalBorderWidths );

            //update style for navigator-box
            (function(style) {

                style.top    = topleft.y + 'px';
                style.left   = topleft.x + 'px';

                var width = Math.abs( topleft.x - bottomright.x );
                var height = Math.abs( topleft.y - bottomright.y );
                // make sure width and height are non-negative so IE doesn't throw
                style.width  = Math.max( width, 0 ) + 'px';
                style.height = Math.max( height, 0 ) + 'px';

            }( this.displayRegion.style ));
        }

    },

    open: function( source ) {
        this.updateSize();
        var containerSize = this.viewer.viewport.containerSize.times( this.sizeRatio );
        if( source.tileSize > containerSize.x ||
            source.tileSize > containerSize.y ){
            this.minPixelRatio = Math.min(
                containerSize.x,
                containerSize.y
            ) / source.tileSize;
        } else {
            this.minPixelRatio = this.viewer.minPixelRatio;
        }
        return $.Viewer.prototype.open.apply( this, [ source ] );
    }

});

/**
 * @private
 * @inner
 * @function
 */
function onCanvasClick( event ) {
    var newBounds,
        viewerPosition,
        dimensions;
    if (! this.drag) {
        if ( this.viewer.viewport ) {
            this.viewer.viewport.panTo( this.viewport.pointFromPixel( event.position ) );
            this.viewer.viewport.applyConstraints();
        }
    }
    else {
        this.drag = false;
    }
}

/**
 * @private
 * @inner
 * @function
 */
function onCanvasDrag( event ) {
    if ( this.viewer.viewport ) {
        this.drag = true;
        if( !this.panHorizontal ){
            event.delta.x = 0;
        }
        if( !this.panVertical ){
            event.delta.y = 0;
        }
        this.viewer.viewport.panBy(
            this.viewport.deltaPointsFromPixels(
                event.delta
            )
        );
    }
}


/**
 * @private
 * @inner
 * @function
 */
function onCanvasRelease( event ) {
    if ( event.insideElementPressed && this.viewer.viewport ) {
        this.viewer.viewport.applyConstraints();
    }
}


/**
 * @private
 * @inner
 * @function
 */
function onCanvasScroll( event ) {
    /**
     * Raised when a scroll event occurs on the {@link OpenSeadragon.Viewer#navigator} element (mouse wheel, touch pinch, etc.).
     *
     * @event navigator-scroll
     * @memberof OpenSeadragon.Viewer
     * @type {object}
     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.
     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.
     * @property {Number} scroll - The scroll delta for the event.
     * @property {Boolean} shift - True if the shift key was pressed during this event.
     * @property {Object} originalEvent - The original DOM event.
     * @property {?Object} userData - Arbitrary subscriber-defined object.
     */
    this.viewer.raiseEvent( 'navigator-scroll', {
        tracker: event.eventSource,
        position: event.position,
        scroll: event.scroll,
        shift: event.shift,
        originalEvent: event.originalEvent
    });

    //dont scroll the page up and down if the user is scrolling
    //in the navigator
    return false;
}


}( OpenSeadragon ));

/*
 * OpenSeadragon - getString/setString
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

//TODO: I guess this is where the i18n needs to be reimplemented.  I'll look
//      into existing patterns for i18n in javascript but i think that mimicking
//      pythons gettext might be a reasonable approach.
var I18N = {
    Errors: {
        Dzc:            "Sorry, we don't support Deep Zoom Collections!",
        Dzi:            "Hmm, this doesn't appear to be a valid Deep Zoom Image.",
        Xml:            "Hmm, this doesn't appear to be a valid Deep Zoom Image.",
        ImageFormat:    "Sorry, we don't support {0}-based Deep Zoom Images.",
        Security:       "It looks like a security restriction stopped us from " +
                        "loading this Deep Zoom Image.",
        Status:         "This space unintentionally left blank ({0} {1}).",
        OpenFailed:     "Unable to open {0}: {1}"
    },

    Tooltips: {
        FullPage:       "Toggle full page",
        Home:           "Go home",
        ZoomIn:         "Zoom in",
        ZoomOut:        "Zoom out",
        NextPage:       "Next page",
        PreviousPage:   "Previous page",
        RotateLeft:     "Rotate left",
        RotateRight:    "Rotate right"
    }
};

$.extend( $, /** @lends OpenSeadragon */{

    /**
     * @function
     * @param {String} property
     */
    getString: function( prop ) {

        var props   = prop.split('.'),
            string  = null,
            args    = arguments,
            container = I18N,
            i;

        for ( i = 0; i < props.length-1; i++ ) {
            // in case not a subproperty
            container = container[ props[ i ] ] || {};
        }
        string = container[ props[ i ] ];

        if ( typeof( string ) != "string" ) {
            $.console.debug( "Untranslated source string:", prop );
            string = ""; // FIXME: this breaks gettext()-style convention, which would return source
        }

        return string.replace(/\{\d+\}/g, function(capture) {
            var i = parseInt( capture.match( /\d+/ ), 10 ) + 1;
            return i < args.length ?
                args[ i ] :
                "";
        });
    },

    /**
     * @function
     * @param {String} property
     * @param {*} value
     */
    setString: function( prop, value ) {

        var props     = prop.split('.'),
            container = I18N,
            i;

        for ( i = 0; i < props.length - 1; i++ ) {
            if ( !container[ props[ i ] ] ) {
                container[ props[ i ] ] = {};
            }
            container = container[ props[ i ] ];
        }

        container[ props[ i ] ] = value;
    }

});

}( OpenSeadragon ));

/*
 * OpenSeadragon - Point
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

/**
 * @class Point
 * @classdesc A Point is really used as a 2-dimensional vector, equally useful for
 * representing a point on a plane, or the height and width of a plane
 * not requiring any other frame of reference.
 *
 * @memberof OpenSeadragon
 * @param {Number} [x] The vector component 'x'. Defaults to the origin at 0.
 * @param {Number} [y] The vector component 'y'. Defaults to the origin at 0.
 */
$.Point = function( x, y ) {
    /**
     * The vector component 'x'.
     * @member {Number} x
     * @memberof OpenSeadragon.Point#
     */
    this.x = typeof ( x ) == "number" ? x : 0;
    /**
     * The vector component 'y'.
     * @member {Number} y
     * @memberof OpenSeadragon.Point#
     */
    this.y = typeof ( y ) == "number" ? y : 0;
};

$.Point.prototype = /** @lends OpenSeadragon.Point.prototype */{

    /**
     * Add another Point to this point and return a new Point.
     * @function
     * @param {OpenSeadragon.Point} point The point to add vector components.
     * @returns {OpenSeadragon.Point} A new point representing the sum of the
     *  vector components
     */
    plus: function( point ) {
        return new $.Point(
            this.x + point.x,
            this.y + point.y
        );
    },

    /**
     * Substract another Point to this point and return a new Point.
     * @function
     * @param {OpenSeadragon.Point} point The point to substract vector components.
     * @returns {OpenSeadragon.Point} A new point representing the substraction of the
     *  vector components
     */
    minus: function( point ) {
        return new $.Point(
            this.x - point.x,
            this.y - point.y
        );
    },

    /**
     * Multiply this point by a factor and return a new Point.
     * @function
     * @param {Number} factor The factor to multiply vector components.
     * @returns {OpenSeadragon.Point} A new point representing the multiplication
     *  of the vector components by the factor
     */
    times: function( factor ) {
        return new $.Point(
            this.x * factor,
            this.y * factor
        );
    },

    /**
     * Divide this point by a factor and return a new Point.
     * @function
     * @param {Number} factor The factor to divide vector components.
     * @returns {OpenSeadragon.Point} A new point representing the division of the
     *  vector components by the factor
     */
    divide: function( factor ) {
        return new $.Point(
            this.x / factor,
            this.y / factor
        );
    },

    /**
     * Compute the opposite of this point and return a new Point.
     * @function
     * @returns {OpenSeadragon.Point} A new point representing the opposite of the
     *  vector components
     */
    negate: function() {
        return new $.Point( -this.x, -this.y );
    },

    /**
     * Compute the distance between this point and another point.
     * @function
     * @param {OpenSeadragon.Point} point The point to compute the distance with.
     * @returns {Number} The distance between the 2 points
     */
    distanceTo: function( point ) {
        return Math.sqrt(
            Math.pow( this.x - point.x, 2 ) +
            Math.pow( this.y - point.y, 2 )
        );
    },

    /**
     * Apply a function to each coordinate of this point and return a new point.
     * @function
     * @param {function} func The function to apply to each coordinate.
     * @returns {OpenSeadragon.Point} A new point with the coordinates computed
     * by the specified function
     */
    apply: function( func ) {
        return new $.Point( func( this.x ), func( this.y ) );
    },

    /**
     * Check if this point is equal to another one.
     * @function
     * @param {OpenSeadragon.Point} point The point to compare this point with.
     * @returns {Boolean} true if they are equal, false otherwise.
     */
    equals: function( point ) {
        return (
            point instanceof $.Point
        ) && (
            this.x === point.x
        ) && (
            this.y === point.y
        );
    },

    /**
     * Rotates the point around the specified pivot
     * From http://stackoverflow.com/questions/4465931/rotate-rectangle-around-a-point
     * @function
     * @param {Number} degress to rotate around the pivot.
     * @param {OpenSeadragon.Point} pivot Point about which to rotate.
     * @returns {OpenSeadragon.Point}. A new point representing the point rotated around the specified pivot
     */
    rotate: function ( degrees, pivot ) {
        var angle = degrees * Math.PI / 180.0,
            x = Math.cos( angle ) * ( this.x - pivot.x ) - Math.sin( angle ) * ( this.y - pivot.y ) + pivot.x,
            y = Math.sin( angle ) * ( this.x - pivot.x ) + Math.cos( angle ) * ( this.y - pivot.y ) + pivot.y;
        return new $.Point( x, y );
    },

    /**
     * Convert this point to a string in the format (x,y) where x and y are
     * rounded to the nearest integer.
     * @function
     * @returns {String} A string representation of this point.
     */
    toString: function() {
        return "(" + Math.round(this.x) + "," + Math.round(this.y) + ")";
    }
};

}( OpenSeadragon ));

/*
 * OpenSeadragon - TileSource
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){


/**
 * @class TileSource
 * @classdesc The TileSource contains the most basic implementation required to create a
 * smooth transition between layer in an image pyramid. It has only a single key
 * interface that must be implemented to complete it key functionality:
 * 'getTileUrl'.  It also has several optional interfaces that can be
 * implemented if a new TileSource wishes to support configuration via a simple
 * object or array ('configure') and if the tile source supports or requires
 * configuration via retreival of a document on the network ala AJAX or JSONP,
 * ('getImageInfo').
 * <br/>
 * By default the image pyramid is split into N layers where the images longest
 * side in M (in pixels), where N is the smallest integer which satisfies
 *      <strong>2^(N+1) >= M</strong>.
 *
 * @memberof OpenSeadragon
 * @extends OpenSeadragon.EventSource
 * @param {Number|Object|Array|String} width
 *      If more than a single argument is supplied, the traditional use of
 *      positional parameters is supplied and width is expected to be the width
 *      source image at its max resolution in pixels.  If a single argument is supplied and
 *      it is an Object or Array, the construction is assumed to occur through
 *      the extending classes implementation of 'configure'.  Finally if only a
 *      single argument is supplied and it is a String, the extending class is
 *      expected to implement 'getImageInfo' and 'configure'.
 * @param {Number} height
 *      Width of the source image at max resolution in pixels.
 * @param {Number} tileSize
 *      The size of the tiles to assumed to make up each pyramid layer in pixels.
 *      Tile size determines the point at which the image pyramid must be
 *      divided into a matrix of smaller images.
 * @param {Number} tileOverlap
 *      The number of pixels each tile is expected to overlap touching tiles.
 * @param {Number} minLevel
 *      The minimum level to attempt to load.
 * @param {Number} maxLevel
 *      The maximum level to attempt to load.
 */
$.TileSource = function( width, height, tileSize, tileOverlap, minLevel, maxLevel ) {
    var callback = null,
        args = arguments,
        options,
        i;

    if( $.isPlainObject( width ) ){
        options = width;
    }else{
        options = {
            width: args[0],
            height: args[1],
            tileSize: args[2],
            tileOverlap: args[3],
            minLevel: args[4],
            maxLevel: args[5]
        };
    }

    //Tile sources supply some events, namely 'ready' when they must be configured
    //by asynchronously fetching their configuration data.
    $.EventSource.call( this );

    //we allow options to override anything we dont treat as
    //required via idiomatic options or which is functionally
    //set depending on the state of the readiness of this tile
    //source
    $.extend( true, this, options );

    //Any functions that are passed as arguments are bound to the ready callback
    /*jshint loopfunc:true*/
    for ( i = 0; i < arguments.length; i++ ) {
        if ( $.isFunction( arguments[ i ] ) ) {
            callback = arguments[ i ];
            this.addHandler( 'ready', function ( event ) {
                callback( event );
            } );
            //only one callback per constructor
            break;
        }
    }

    /**
     * Ratio of width to height
     * @member {Number} aspectRatio
     * @memberof OpenSeadragon.TileSource#
     */
    /**
     * Vector storing x and y dimensions ( width and height respectively ).
     * @member {OpenSeadragon.Point} dimensions
     * @memberof OpenSeadragon.TileSource#
     */
    /**
     * The size of the image tiles used to compose the image.
     * @member {Number} tileSize
     * @memberof OpenSeadragon.TileSource#
     */
    /**
     * The overlap in pixels each tile shares with its adjacent neighbors.
     * @member {Number} tileOverlap
     * @memberof OpenSeadragon.TileSource#
     */
    /**
     * The minimum pyramid level this tile source supports or should attempt to load.
     * @member {Number} minLevel
     * @memberof OpenSeadragon.TileSource#
     */
    /**
     * The maximum pyramid level this tile source supports or should attempt to load.
     * @member {Number} maxLevel
     * @memberof OpenSeadragon.TileSource#
     */
    /**
     * 
     * @member {Boolean} ready
     * @memberof OpenSeadragon.TileSource#
     */

    if( 'string' == $.type( arguments[ 0 ] ) ){
        //in case the getImageInfo method is overriden and/or implies an
        //async mechanism set some safe defaults first
        this.aspectRatio = 1;
        this.dimensions  = new $.Point( 10, 10 );
        this.tileSize    = 0;
        this.tileOverlap = 0;
        this.minLevel    = 0;
        this.maxLevel    = 0;
        this.ready       = false;
        //configuration via url implies the extending class
        //implements and 'configure'
        this.getImageInfo( arguments[ 0 ] );

    } else {

        //explicit configuration via positional args in constructor
        //or the more idiomatic 'options' object
        this.ready       = true;
        this.aspectRatio = ( options.width && options.height ) ?
            (  options.width / options.height ) : 1;
        this.dimensions  = new $.Point( options.width, options.height );
        this.tileSize    = options.tileSize ? options.tileSize : 0;
        this.tileOverlap = options.tileOverlap ? options.tileOverlap : 0;
        this.minLevel    = options.minLevel ? options.minLevel : 0;
        this.maxLevel    = ( undefined !== options.maxLevel && null !== options.maxLevel ) ?
            options.maxLevel : (
                ( options.width && options.height ) ? Math.ceil(
                    Math.log( Math.max( options.width, options.height ) ) /
                    Math.log( 2 )
                ) : 0
            );
        if( callback && $.isFunction( callback ) ){
            callback( this );
        }
    }


};


$.TileSource.prototype = /** @lends OpenSeadragon.TileSource.prototype */{

    /**
     * @function
     * @param {Number} level
     */
    getLevelScale: function( level ) {

        // see https://github.com/openseadragon/openseadragon/issues/22
        // we use the tilesources implementation of getLevelScale to generate
        // a memoized re-implementation
        var levelScaleCache = {},
            i;
        for( i = 0; i <= this.maxLevel; i++ ){
            levelScaleCache[ i ] = 1 / Math.pow(2, this.maxLevel - i);
        }
        this.getLevelScale = function( _level ){
            return levelScaleCache[ _level ];
        };
        return this.getLevelScale( level );
    },

    /**
     * @function
     * @param {Number} level
     */
    getNumTiles: function( level ) {
        var scale = this.getLevelScale( level ),
            x = Math.ceil( scale * this.dimensions.x / this.tileSize ),
            y = Math.ceil( scale * this.dimensions.y / this.tileSize );

        return new $.Point( x, y );
    },

    /**
     * @function
     * @param {Number} level
     */
    getPixelRatio: function( level ) {
        var imageSizeScaled = this.dimensions.times( this.getLevelScale( level ) ),
            rx = 1.0 / imageSizeScaled.x,
            ry = 1.0 / imageSizeScaled.y;

        return new $.Point(rx, ry);
    },


    /**
     * @function
     * @param {Number} level
     */
    getClosestLevel: function( rect ) {
        var i,
            tilesPerSide = Math.floor( Math.max( rect.x, rect.y ) / this.tileSize ),
            tiles;
        for( i = this.minLevel; i < this.maxLevel; i++ ){
            tiles = this.getNumTiles( i );
            if( Math.max( tiles.x, tiles.y ) + 1 >= tilesPerSide ){
                break;
            }
        }
        return Math.max( 0, i - 1 );
    },

    /**
     * @function
     * @param {Number} level
     * @param {OpenSeadragon.Point} point
     */
    getTileAtPoint: function( level, point ) {
        var pixel = point.times( this.dimensions.x ).times( this.getLevelScale(level ) ),
            tx = Math.floor( pixel.x / this.tileSize ),
            ty = Math.floor( pixel.y / this.tileSize );

        return new $.Point( tx, ty );
    },

    /**
     * @function
     * @param {Number} level
     * @param {Number} x
     * @param {Number} y
     */
    getTileBounds: function( level, x, y ) {
        var dimensionsScaled = this.dimensions.times( this.getLevelScale( level ) ),
            px = ( x === 0 ) ? 0 : this.tileSize * x - this.tileOverlap,
            py = ( y === 0 ) ? 0 : this.tileSize * y - this.tileOverlap,
            sx = this.tileSize + ( x === 0 ? 1 : 2 ) * this.tileOverlap,
            sy = this.tileSize + ( y === 0 ? 1 : 2 ) * this.tileOverlap,
            scale = 1.0 / dimensionsScaled.x;

        sx = Math.min( sx, dimensionsScaled.x - px );
        sy = Math.min( sy, dimensionsScaled.y - py );

        return new $.Rect( px * scale, py * scale, sx * scale, sy * scale );
    },


    /**
     * Responsible for retrieving, and caching the
     * image metadata pertinent to this TileSources implementation.
     * @function
     * @param {String} url
     * @throws {Error}
     */
    getImageInfo: function( url ) {
        var _this = this,
            callbackName,
            callback,
            readySource,
            options,
            urlParts,
            filename,
            lastDot;


        if( url ) {
            urlParts = url.split( '/' );
            filename = urlParts[ urlParts.length - 1 ];
            lastDot  = filename.lastIndexOf( '.' );
            if ( lastDot > -1 ) {
                urlParts[ urlParts.length - 1 ] = filename.slice( 0, lastDot );
            }
        }

        callback = function( data ){
            if( typeof(data) === "string" ) {
                data = $.parseXml( data );
            }
            var $TileSource = $.TileSource.determineType( _this, data, url );
            if ( !$TileSource ) {
                /**
                 * Raised when an error occurs loading a TileSource.
                 *
                 * @event open-failed
                 * @memberof OpenSeadragon.TileSource
                 * @type {object}
                 * @property {OpenSeadragon.TileSource} eventSource - A reference to the TileSource which raised the event.
                 * @property {String} message
                 * @property {String} source
                 * @property {?Object} userData - Arbitrary subscriber-defined object.
                 */
                _this.raiseEvent( 'open-failed', { message: "Unable to load TileSource", source: url } );
                return;
            }

            options = $TileSource.prototype.configure.apply( _this, [ data, url ]);
            readySource = new $TileSource( options );
            _this.ready = true;
            /**
             * Raised when a TileSource is opened and initialized.
             *
             * @event ready
             * @memberof OpenSeadragon.TileSource
             * @type {object}
             * @property {OpenSeadragon.TileSource} eventSource - A reference to the TileSource which raised the event.
             * @property {Object} tileSource
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            _this.raiseEvent( 'ready', { tileSource: readySource } );
        };

        if( url.match(/\.js$/) ){
            //TODO: Its not very flexible to require tile sources to end jsonp
            //      request for info  with a url that ends with '.js' but for
            //      now it's the only way I see to distinguish uniformly.
            callbackName = url.split( '/' ).pop().replace('.js','');
            $.jsonp({
                url: url,
                async: false,
                callbackName: callbackName,
                callback: callback
            });
        } else {
            // request info via xhr asynchronously.
            $.makeAjaxRequest( url, function( xhr ) {
                var data = processResponse( xhr );
                callback( data );
            }, function ( xhr, exc ) {
                var msg;

                /*
                    IE < 10 will block XHR requests to different origins. Any property access on the request
                    object will raise an exception which we'll attempt to handle by formatting the original
                    exception rather than the second one raised when we try to access xhr.status
                 */
                try {
                    msg = "HTTP " + xhr.status + " attempting to load TileSource";
                } catch ( e ) {
                    var formattedExc;
                    if ( typeof( exc ) == "undefined" || !exc.toString ) {
                        formattedExc = "Unknown error";
                    } else {
                        formattedExc = exc.toString();
                    }

                    msg = formattedExc + " attempting to load TileSource";
                }

                /***
                 * Raised when an error occurs loading a TileSource.
                 *
                 * @event open-failed
                 * @memberof OpenSeadragon.TileSource
                 * @type {object}
                 * @property {OpenSeadragon.TileSource} eventSource - A reference to the TileSource which raised the event.
                 * @property {String} message
                 * @property {String} source
                 * @property {?Object} userData - Arbitrary subscriber-defined object.
                 */
                _this.raiseEvent( 'open-failed', {
                    message: msg,
                    source: url
                });
            });
        }

    },

    /**
     * Responsible determining if a the particular TileSource supports the
     * data format ( and allowed to apply logic against the url the data was
     * loaded from, if any ). Overriding implementations are expected to do
     * something smart with data and / or url to determine support.  Also
     * understand that iteration order of TileSources is not guarunteed so
     * please make sure your data or url is expressive enough to ensure a simple
     * and sufficient mechanisim for clear determination.
     * @function
     * @param {String|Object|Array|Document} data
     * @param {String} url - the url the data was loaded
     *      from if any.
     * @return {Boolean}
     */
    supports: function( data, url ) {
        return false;
    },

    /**
     * Responsible for parsing and configuring the
     * image metadata pertinent to this TileSources implementation.
     * This method is not implemented by this class other than to throw an Error
     * announcing you have to implement it.  Because of the variety of tile
     * server technologies, and various specifications for building image
     * pyramids, this method is here to allow easy integration.
     * @function
     * @param {String|Object|Array|Document} data
     * @param {String} url - the url the data was loaded
     *      from if any.
     * @return {Object} options - A dictionary of keyword arguments sufficient
     *      to configure this tile sources constructor.
     * @throws {Error}
     */
    configure: function( data, url ) {
        throw new Error( "Method not implemented." );
    },

    /**
     * Responsible for retriving the url which will return an image for the
     * region speified by the given x, y, and level components.
     * This method is not implemented by this class other than to throw an Error
     * announcing you have to implement it.  Because of the variety of tile
     * server technologies, and various specifications for building image
     * pyramids, this method is here to allow easy integration.
     * @function
     * @param {Number} level
     * @param {Number} x
     * @param {Number} y
     * @throws {Error}
     */
    getTileUrl: function( level, x, y ) {
        throw new Error( "Method not implemented." );
    },

    /**
     * @function
     * @param {Number} level
     * @param {Number} x
     * @param {Number} y
     */
    tileExists: function( level, x, y ) {
        var numTiles = this.getNumTiles( level );
        return  level >= this.minLevel &&
                level <= this.maxLevel &&
                x >= 0 &&
                y >= 0 &&
                x < numTiles.x &&
                y < numTiles.y;
    }
};


$.extend( true, $.TileSource.prototype, $.EventSource.prototype );


/**
 * Decides whether to try to process the response as xml, json, or hand back
 * the text
 * @private
 * @inner
 * @function
 * @param {XMLHttpRequest} xhr - the completed network request
 */
function processResponse( xhr ){
    var responseText = xhr.responseText,
        status       = xhr.status,
        statusText,
        data;

    if ( !xhr ) {
        throw new Error( $.getString( "Errors.Security" ) );
    } else if ( xhr.status !== 200 && xhr.status !== 0 ) {
        status     = xhr.status;
        statusText = ( status == 404 ) ?
            "Not Found" :
            xhr.statusText;
        throw new Error( $.getString( "Errors.Status", status, statusText ) );
    }

    if( responseText.match(/\s*<.*/) ){
        try{
        data = ( xhr.responseXML && xhr.responseXML.documentElement ) ?
            xhr.responseXML :
            $.parseXml( responseText );
        } catch (e){
            data = xhr.responseText;
        }
    }else if( responseText.match(/\s*[\{\[].*/) ){
        /*jshint evil:true*/
        data = eval( '('+responseText+')' );
    }else{
        data = responseText;
    }
    return data;
}


/**
 * Determines the TileSource Implementation by introspection of OpenSeadragon
 * namespace, calling each TileSource implementation of 'isType'
 * @private
 * @inner
 * @function
 * @param {Object|Array|Document} data - the tile source configuration object
 * @param {String} url - the url where the tile source configuration object was
 *      loaded from, if any.
 */
$.TileSource.determineType = function( tileSource, data, url ){
    var property;
    for( property in OpenSeadragon ){
        if( property.match(/.+TileSource$/) &&
            $.isFunction( OpenSeadragon[ property ] ) &&
            $.isFunction( OpenSeadragon[ property ].prototype.supports ) &&
            OpenSeadragon[ property ].prototype.supports.call( tileSource, data, url )
        ){
            return OpenSeadragon[ property ];
        }
    }

    $.console.error( "No TileSource was able to open %s %s", url, data );
};


}( OpenSeadragon ));

/*
 * OpenSeadragon - DziTileSource
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

/**
 * @class DziTileSource
 * @memberof OpenSeadragon
 * @extends OpenSeadragon.TileSource
 * @param {Number|Object} width - the pixel width of the image or the idiomatic
 *      options object which is used instead of positional arguments.
 * @param {Number} height
 * @param {Number} tileSize
 * @param {Number} tileOverlap
 * @param {String} tilesUrl
 * @param {String} fileFormat
 * @param {OpenSeadragon.DisplayRect[]} displayRects
 * @property {String} tilesUrl
 * @property {String} fileFormat
 * @property {OpenSeadragon.DisplayRect[]} displayRects
 */
$.DziTileSource = function( width, height, tileSize, tileOverlap, tilesUrl, fileFormat, displayRects, minLevel, maxLevel ) {
    var i,
        rect,
        level,
        options;

    if( $.isPlainObject( width ) ){
        options = width;
    }else{
        options = {
            width: arguments[ 0 ],
            height: arguments[ 1 ],
            tileSize: arguments[ 2 ],
            tileOverlap: arguments[ 3 ],
            tilesUrl: arguments[ 4 ],
            fileFormat: arguments[ 5 ],
            displayRects: arguments[ 6 ],
            minLevel: arguments[ 7 ],
            maxLevel: arguments[ 8 ]
        };
    }

    this._levelRects  = {};
    this.tilesUrl     = options.tilesUrl;
    this.fileFormat   = options.fileFormat;
    this.displayRects = options.displayRects;

    if ( this.displayRects ) {
        for ( i = this.displayRects.length - 1; i >= 0; i-- ) {
            rect = this.displayRects[ i ];
            for ( level = rect.minLevel; level <= rect.maxLevel; level++ ) {
                if ( !this._levelRects[ level ] ) {
                    this._levelRects[ level ] = [];
                }
                this._levelRects[ level ].push( rect );
            }
        }
    }

    $.TileSource.apply( this, [ options ] );

};

$.extend( $.DziTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.DziTileSource.prototype */{


    /**
     * Determine if the data and/or url imply the image service is supported by
     * this tile source.
     * @function
     * @param {Object|Array} data
     * @param {String} optional - url
     */
    supports: function( data, url ){
        var ns;
        if ( data.Image ) {
            ns = data.Image.xmlns;
        } else if ( data.documentElement && "Image" == data.documentElement.tagName ) {
            ns = data.documentElement.namespaceURI;
        }

        return ( "http://schemas.microsoft.com/deepzoom/2008" == ns ||
            "http://schemas.microsoft.com/deepzoom/2009" == ns );
    },

    /**
     *
     * @function
     * @param {Object|XMLDocument} data - the raw configuration
     * @param {String} url - the url the data was retreived from if any.
     * @return {Object} options - A dictionary of keyword arguments sufficient
     *      to configure this tile sources constructor.
     */
    configure: function( data, url ){

        var options;

        if( !$.isPlainObject(data) ){

            options = configureFromXML( this, data );

        }else{

            options = configureFromObject( this, data );
        }

        if (url && !options.tilesUrl) {
            options.tilesUrl = url.replace(/([^\/]+)\.(dzi|xml|js)$/, '$1_files/');
        }

        return options;
    },


    /**
     * @function
     * @param {Number} level
     * @param {Number} x
     * @param {Number} y
     */
    getTileUrl: function( level, x, y ) {
        return [ this.tilesUrl, level, '/', x, '_', y, '.', this.fileFormat ].join( '' );
    },


    /**
     * @function
     * @param {Number} level
     * @param {Number} x
     * @param {Number} y
     */
    tileExists: function( level, x, y ) {
        var rects = this._levelRects[ level ],
            rect,
            scale,
            xMin,
            yMin,
            xMax,
            yMax,
            i;

        if ( !rects || !rects.length ) {
            return true;
        }

        for ( i = rects.length - 1; i >= 0; i-- ) {
            rect = rects[ i ];

            if ( level < rect.minLevel || level > rect.maxLevel ) {
                continue;
            }

            scale = this.getLevelScale( level );
            xMin = rect.x * scale;
            yMin = rect.y * scale;
            xMax = xMin + rect.width * scale;
            yMax = yMin + rect.height * scale;

            xMin = Math.floor( xMin / this.tileSize );
            yMin = Math.floor( yMin / this.tileSize );
            xMax = Math.ceil( xMax / this.tileSize );
            yMax = Math.ceil( yMax / this.tileSize );

            if ( xMin <= x && x < xMax && yMin <= y && y < yMax ) {
                return true;
            }
        }

        return false;
    }
});


/**
 * @private
 * @inner
 * @function
 */
function configureFromXML( tileSource, xmlDoc ){

    if ( !xmlDoc || !xmlDoc.documentElement ) {
        throw new Error( $.getString( "Errors.Xml" ) );
    }

    var root           = xmlDoc.documentElement,
        rootName       = root.tagName,
        configuration  = null,
        displayRects   = [],
        dispRectNodes,
        dispRectNode,
        rectNode,
        sizeNode,
        i;

    if ( rootName == "Image" ) {

        try {
            sizeNode = root.getElementsByTagName( "Size" )[ 0 ];
            configuration = {
                Image: {
                    xmlns:       "http://schemas.microsoft.com/deepzoom/2008",
                    Url:         root.getAttribute( "Url" ),
                    Format:      root.getAttribute( "Format" ),
                    DisplayRect: null,
                    Overlap:     parseInt( root.getAttribute( "Overlap" ), 10 ),
                    TileSize:    parseInt( root.getAttribute( "TileSize" ), 10 ),
                    Size: {
                        Height: parseInt( sizeNode.getAttribute( "Height" ), 10 ),
                        Width:  parseInt( sizeNode.getAttribute( "Width" ), 10 )
                    }
                }
            };

            if ( !$.imageFormatSupported( configuration.Image.Format ) ) {
                throw new Error(
                    $.getString( "Errors.ImageFormat", configuration.Image.Format.toUpperCase() )
                );
            }

            dispRectNodes = root.getElementsByTagName( "DisplayRect" );
            for ( i = 0; i < dispRectNodes.length; i++ ) {
                dispRectNode = dispRectNodes[ i ];
                rectNode     = dispRectNode.getElementsByTagName( "Rect" )[ 0 ];

                displayRects.push({
                    Rect: {
                        X: parseInt( rectNode.getAttribute( "X" ), 10 ),
                        Y: parseInt( rectNode.getAttribute( "Y" ), 10 ),
                        Width: parseInt( rectNode.getAttribute( "Width" ), 10 ),
                        Height: parseInt( rectNode.getAttribute( "Height" ), 10 ),
                        MinLevel: parseInt( dispRectNode.getAttribute( "MinLevel" ), 10 ),
                        MaxLevel: parseInt( dispRectNode.getAttribute( "MaxLevel" ), 10 )
                    }
                });
            }

            if( displayRects.length ){
                configuration.Image.DisplayRect = displayRects;
            }

            return configureFromObject( tileSource, configuration );

        } catch ( e ) {
            throw (e instanceof Error) ?
                e :
                new Error( $.getString("Errors.Dzi") );
        }
    } else if ( rootName == "Collection" ) {
        throw new Error( $.getString( "Errors.Dzc" ) );
    } else if ( rootName == "Error" ) {
        return $._processDZIError( root );
    }

    throw new Error( $.getString( "Errors.Dzi" ) );
}

/**
 * @private
 * @inner
 * @function
 */
function configureFromObject( tileSource, configuration ){
    var imageData     = configuration.Image,
        tilesUrl      = imageData.Url,
        fileFormat    = imageData.Format,
        sizeData      = imageData.Size,
        dispRectData  = imageData.DisplayRect || [],
        width         = parseInt( sizeData.Width, 10 ),
        height        = parseInt( sizeData.Height, 10 ),
        tileSize      = parseInt( imageData.TileSize, 10 ),
        tileOverlap   = parseInt( imageData.Overlap, 10 ),
        displayRects  = [],
        rectData,
        i;

    //TODO: need to figure out out to better handle image format compatibility
    //      which actually includes additional file formats like xml and pdf
    //      and plain text for various tilesource implementations to avoid low
    //      level errors.
    //
    //      For now, just don't perform the check.
    //
    /*if ( !imageFormatSupported( fileFormat ) ) {
        throw new Error(
            $.getString( "Errors.ImageFormat", fileFormat.toUpperCase() )
        );
    }*/

    for ( i = 0; i < dispRectData.length; i++ ) {
        rectData = dispRectData[ i ].Rect;

        displayRects.push( new $.DisplayRect(
            parseInt( rectData.X, 10 ),
            parseInt( rectData.Y, 10 ),
            parseInt( rectData.Width, 10 ),
            parseInt( rectData.Height, 10 ),
            parseInt( rectData.MinLevel, 10 ),
            parseInt( rectData.MaxLevel, 10 )
        ));
    }

    return $.extend(true, {
        width: width, /* width *required */
        height: height, /* height *required */
        tileSize: tileSize, /* tileSize *required */
        tileOverlap: tileOverlap, /* tileOverlap *required */
        minLevel: null, /* minLevel */
        maxLevel: null, /* maxLevel */
        tilesUrl: tilesUrl, /* tilesUrl */
        fileFormat: fileFormat, /* fileFormat */
        displayRects: displayRects /* displayRects */
    }, configuration );

}

}( OpenSeadragon ));

/*
 * OpenSeadragon - IIIFTileSource
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * The getTileUrl implementation is based on Jon Stroop's Python version,
 * which is released under the New BSD license:
 * https://gist.github.com/jpstroop/4624253
 */


(function( $ ){

/**
 * @class IIIFTileSource
 * @classdesc A client implementation of the International Image Interoperability
 * Format: Image API Draft 0.2
 *
 * @memberof OpenSeadragon
 * @extends OpenSeadragon.TileSource
 * @see http://library.stanford.edu/iiif/image-api/
 */
$.IIIFTileSource = function( options ){

    $.extend( true, this, options );

    if( !(this.height && this.width && this.identifier && this.tilesUrl ) ){
        throw new Error('IIIF required parameters not provided.');
    }

    //TODO: at this point the base tile source implementation assumes
    //      a tile is a square and so only has one property tileSize
    //      to store it.  It may be possible to make tileSize a vector
    //      OpenSeadraon.Point but would require careful implementation
    //      to preserve backward compatibility.
    options.tileSize = this.tile_width;

    if (! options.maxLevel ) {
        var mf = -1;
        var scfs = this.scale_factors || this.scale_factor;
        if ( scfs instanceof Array ) {
            for ( var i = 0; i < scfs.length; i++ ) {
                var cf = Number( scfs[i] );
                if ( !isNaN( cf ) && cf > mf ) { mf = cf; }
            }
        }
        if ( mf < 0 ) { options.maxLevel = Number(Math.ceil(Math.log(Math.max(this.width, this.height), 2))); }
        else { options.maxLevel = mf; }
    }

    $.TileSource.apply( this, [ options ] );
};

$.extend( $.IIIFTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.IIIFTileSource.prototype */{
    /**
     * Determine if the data and/or url imply the image service is supported by
     * this tile source.
     * @method
     * @param {Object|Array} data
     * @param {String} optional - url
     */
    supports: function( data, url ){
        return (
            data.ns &&
            "http://library.stanford.edu/iiif/image-api/ns/" == data.ns
        ) || (
            data.profile && (
                "http://library.stanford.edu/iiif/image-api/compliance.html#level1" == data.profile ||
                "http://library.stanford.edu/iiif/image-api/compliance.html#level2" == data.profile ||
                "http://library.stanford.edu/iiif/image-api/compliance.html#level3" == data.profile ||
                "http://library.stanford.edu/iiif/image-api/compliance.html" == data.profile
            )
        ) || (
            data.documentElement &&
            "info" == data.documentElement.tagName &&
            "http://library.stanford.edu/iiif/image-api/ns/" ==
                data.documentElement.namespaceURI
        );
    },

   /**
     *
     * @method
     * @param {Object|XMLDocument} data - the raw configuration
     * @param {String} url - the url the data was retreived from if any.
     * @return {Object} options - A dictionary of keyword arguments sufficient
     *      to configure this tile source via its constructor.
     */
    configure: function( data, url ){
        var service,
            options,
            host;

        if( !$.isPlainObject(data) ){

            options = configureFromXml( this, data );

        }else{

            options = configureFromObject( this, data );
        }

        if( url && !options.tilesUrl ){
            service = url.split('/');
            service.pop(); //info.json or info.xml
            service = service.join('/');
            if( 'http' !== url.substring( 0, 4 ) ){
                host = location.protocol + '//' + location.host;
                service = host + service;
            }
            options.tilesUrl = service.replace(
                data.identifier,
                ''
            );
        }

        return options;
    },

    /**
     * Responsible for retreiving the url which will return an image for the
     * region speified by the given x, y, and level components.
     * @method
     * @param {Number} level - z index
     * @param {Number} x
     * @param {Number} y
     * @throws {Error}
     */
    getTileUrl: function( level, x, y ){

        //# constants
        var IIIF_ROTATION = '0',
            IIIF_QUALITY = 'native.jpg',

            //## get the scale (level as a decimal)
            scale = Math.pow( 0.5, this.maxLevel - level ),

            //## get iiif size
            // iiif_size = 'pct:' + ( scale * 100 ),

            //# image dimensions at this level
            level_width = Math.ceil( this.width * scale ),
            level_height = Math.ceil( this.height * scale ),

            //## iiif region
            iiif_tile_size_width = Math.ceil( this.tileSize / scale ),
            iiif_tile_size_height = Math.ceil( this.tileSize / scale ),
            iiif_region,
            iiif_tile_x,
            iiif_tile_y,
            iiif_tile_w,
            iiif_tile_h,
            iiif_size;


        if ( level_width < this.tile_width && level_height < this.tile_height ){
            iiif_size = level_width + ","; // + level_height; only one dim. for IIIF level 1 compliance
            iiif_region = 'full';
        } else {
            iiif_tile_x = x * iiif_tile_size_width;
            iiif_tile_y = y * iiif_tile_size_height;
            iiif_tile_w = Math.min( iiif_tile_size_width, this.width - iiif_tile_x );
            iiif_tile_h = Math.min( iiif_tile_size_height, this.height - iiif_tile_y );
            iiif_size = Math.ceil(iiif_tile_w * scale) + ",";
            iiif_region = [ iiif_tile_x, iiif_tile_y, iiif_tile_w, iiif_tile_h ].join(',');
        }

        return [
            this.tilesUrl,
            this.identifier,
            iiif_region,
            iiif_size,
            IIIF_ROTATION,
            IIIF_QUALITY
        ].join('/');
    }


});

/**
 * @private
 * @inner
 * @function
 * @example
 *   <?xml version="1.0" encoding="UTF-8"?>
 *   <info xmlns="http://library.stanford.edu/iiif/image-api/ns/">
 *     <identifier>1E34750D-38DB-4825-A38A-B60A345E591C</identifier>
 *     <width>6000</width>
 *     <height>4000</height>
 *     <scale_factors>
 *       <scale_factor>1</scale_factor>
 *       <scale_factor>2</scale_factor>
 *       <scale_factor>4</scale_factor>
 *     </scale_factors>
 *     <tile_width>1024</tile_width>
 *     <tile_height>1024</tile_height>
 *     <formats>
 *       <format>jpg</format>
 *       <format>png</format>
 *     </formats>
 *     <qualities>
 *       <quality>native</quality>
 *       <quality>grey</quality>
 *     </qualities>
 *   </info>
 */
function configureFromXml( tileSource, xmlDoc ){

    //parse the xml
    if ( !xmlDoc || !xmlDoc.documentElement ) {
        throw new Error( $.getString( "Errors.Xml" ) );
    }

    var root            = xmlDoc.documentElement,
        rootName        = root.tagName,
        configuration   = null;

    if ( rootName == "info" ) {

        try {

            configuration = {
                "ns": root.namespaceURI
            };

            parseXML( root, configuration );

            return configureFromObject( tileSource, configuration );

        } catch ( e ) {
            throw (e instanceof Error) ?
                e :
                new Error( $.getString("Errors.IIIF") );
        }
    }

    throw new Error( $.getString( "Errors.IIIF" ) );

}


/**
 * @private
 * @inner
 * @function
 */
function parseXML( node, configuration, property ){
    var i,
        value;
    if( node.nodeType == 3 && property ){//text node
        value = node.nodeValue.trim();
        if( value.match(/^\d*$/)){
            value = Number( value );
        }
        if( !configuration[ property ] ){
            configuration[ property ] = value;
        }else{
            if( !$.isArray( configuration[ property ] ) ){
                configuration[ property ] = [ configuration[ property ] ];
            }
            configuration[ property ].push( value );
        }
    } else if( node.nodeType == 1 ){
        for( i = 0; i < node.childNodes.length; i++ ){
            parseXML( node.childNodes[ i ], configuration, node.nodeName );
        }
    }
}


/**
 * @private
 * @inner
 * @function
 * @example
 *   {
 *       "profile" : "http://library.stanford.edu/iiif/image-api/compliance.html#level1",
 *       "identifier" : "1E34750D-38DB-4825-A38A-B60A345E591C",
 *       "width" : 6000,
 *       "height" : 4000,
 *       "scale_factors" : [ 1, 2, 4 ],
 *       "tile_width" : 1024,
 *       "tile_height" : 1024,
 *       "formats" : [ "jpg", "png" ],
 *       "quality" : [ "native", "grey" ]
 *   }
 */
function configureFromObject( tileSource, configuration ){
    //the image_host property is not part of the iiif standard but is included here to
    //allow the info.json and info.xml specify a different server to load the
    //images from so we can test the implementation.
    if( configuration.image_host ){
        configuration.tilesUrl = configuration.image_host;
    }
    return configuration;
}

}( OpenSeadragon ));

/*
 * OpenSeadragon - IIIF1_1TileSource
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

/**
 * @class IIIF1_1TileSource
 * @classdesc A client implementation of the International Image Interoperability
 * Format: Image API 1.1
 *
 * @memberof OpenSeadragon
 * @extends OpenSeadragon.TileSource
 * @see http://library.stanford.edu/iiif/image-api/
 */
$.IIIF1_1TileSource = function( options ){


    $.extend( true, this, options );


    if ( !( this.height && this.width && this['@id'] ) ){
        throw new Error( 'IIIF required parameters not provided.' );
    }

    if ( ( this.profile &&
        this.profile == "http://library.stanford.edu/iiif/image-api/1.1/compliance.html#level0" ) ){
        // what if not reporting a profile?
        throw new Error( 'IIIF Image API 1.1 compliance level 1 or greater is required.' );
    }

    if ( this.tile_width ) {
        options.tileSize = this.tile_width;
    } else if ( this.tile_height ) {
        options.tileSize = this.tile_height;
    } else {
        // use the largest of tileOptions that is smaller than the short
        // dimension

        var shortDim = Math.min( this.height, this.width ),
            tileOptions = [256,512,1024],
            smallerTiles = [];

            for ( var c = 0; c < tileOptions.length; c++ ) {
                if ( tileOptions[c] <= shortDim ) {
                    smallerTiles.push( tileOptions[c] );
                }
            }

        if ( smallerTiles.length > 0 ) {
            options.tileSize = Math.max.apply( null, smallerTiles );
        } else {
            // If we're smaller than 256, just use the short side.
            options.tileSize = shortDim;
        }
        this.tile_width = options.tileSize;  // So that 'full' gets used for 
        this.tile_height = options.tileSize; // the region below
    }

    if ( !options.maxLevel ) {
        var mf = -1;
        var scfs = this.scale_factors || this.scale_factor;
        if ( scfs instanceof Array ) {
            for ( var i = 0; i < scfs.length; i++ ) {
                var cf = Number( scfs[i] );
                if ( !isNaN( cf ) && cf > mf ) { mf = cf; }
            }
        }
        if ( mf < 0 ) { options.maxLevel = Number( Math.ceil( Math.log( Math.max( this.width, this.height ), 2 ) ) ); }
        else { options.maxLevel = mf; }
    }

    $.TileSource.apply( this, [ options ] );
};

$.extend( $.IIIF1_1TileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.IIIF1_1TileSource.prototype */{
    /**
     * Determine if the data and/or url imply the image service is supported by
     * this tile source.
     * @function
     * @param {Object|Array} data
     * @param {String} optional - url
     */
    supports: function( data, url ) {
        return ( data['@context'] &&
            data['@context'] == "http://library.stanford.edu/iiif/image-api/1.1/context.json" );
    },

    /**
     *
     * @function
     * @param {Object} data - the raw configuration
     * @example <caption>IIIF 1.1 Info Looks like this (XML syntax is no more)</caption>
     * {
     *   "@context" : "http://library.stanford.edu/iiif/image-api/1.1/context.json",
     *   "@id" : "http://iiif.example.com/prefix/1E34750D-38DB-4825-A38A-B60A345E591C",
     *   "width" : 6000,
     *   "height" : 4000,
     *   "scale_factors" : [ 1, 2, 4 ],
     *   "tile_width" : 1024,
     *   "tile_height" : 1024,
     *   "formats" : [ "jpg", "png" ],
     *   "qualities" : [ "native", "grey" ],
     *   "profile" : "http://library.stanford.edu/iiif/image-api/1.1/compliance.html#level0"
     * }
     */
    configure: function( data ){
      return data;
    },
    /**
     * Responsible for retreiving the url which will return an image for the
     * region specified by the given x, y, and level components.
     * @function
     * @param {Number} level - z index
     * @param {Number} x
     * @param {Number} y
     * @throws {Error}
     */
    getTileUrl: function( level, x, y ){

        //# constants

        var IIIF_ROTATION = '0',
            IIIF_QUALITY = 'native.jpg',

            //## get the scale (level as a decimal)
            scale = Math.pow( 0.5, this.maxLevel - level ),

            //# image dimensions at this level
            levelWidth = Math.ceil( this.width * scale ),
            levelHeight = Math.ceil( this.height * scale ),

            //## iiif region
            iiifTileSizeWidth = Math.ceil( this.tileSize / scale ),
            iiifTileSizeHeight = Math.ceil( this.tileSize / scale ),
            iiifRegion,
            iiifTileX,
            iiifTileY,
            iiifTileW,
            iiifTileH,
            iiifSize,
            uri;

        if ( levelWidth < this.tile_width && levelHeight < this.tile_height ){
            iiifSize = levelWidth + ",";
            iiifRegion = 'full';
        } else {
            iiifTileX = x * iiifTileSizeWidth;
            iiifTileY = y * iiifTileSizeHeight;
            iiifTileW = Math.min( iiifTileSizeWidth, this.width - iiifTileX );
            iiifTileH = Math.min( iiifTileSizeHeight, this.height - iiifTileY );

            iiifSize = Math.ceil( iiifTileW * scale ) + ",";

            iiifRegion = [ iiifTileX, iiifTileY, iiifTileW, iiifTileH ].join( ',' );
        }
        uri = [ this['@id'], iiifRegion, iiifSize, IIIF_ROTATION, IIIF_QUALITY ].join( '/' );
        return uri;
    }
  });

}( OpenSeadragon ));

/*
 * OpenSeadragon - OsmTileSource
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Derived from the OSM tile source in Rainer Simon's seajax-utils project
 * <http://github.com/rsimon/seajax-utils>.  Rainer Simon has contributed
 * the included code to the OpenSeadragon project under the New BSD license;
 * see <https://github.com/openseadragon/openseadragon/issues/58>.
 */


(function( $ ){

/**
 * @class OsmTileSource
 * @classdesc A tilesource implementation for OpenStreetMap.<br><br>
 *
 * Note 1. Zoomlevels. Deep Zoom and OSM define zoom levels differently. In  Deep
 * Zoom, level 0 equals an image of 1x1 pixels. In OSM, level 0 equals an image of
 * 256x256 levels (see http://gasi.ch/blog/inside-deep-zoom-2). I.e. there is a
 * difference of log2(256)=8 levels.<br><br>
 *
 * Note 2. Image dimension. According to the OSM Wiki
 * (http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Zoom_levels)
 * the highest Mapnik zoom level has 256.144x256.144 tiles, with a 256x256
 * pixel size. I.e. the Deep Zoom image dimension is 65.572.864x65.572.864
 * pixels.
 *
 * @memberof OpenSeadragon
 * @extends OpenSeadragon.TileSource
 * @param {Number|Object} width - the pixel width of the image or the idiomatic
 *      options object which is used instead of positional arguments.
 * @param {Number} height
 * @param {Number} tileSize
 * @param {Number} tileOverlap
 * @param {String} tilesUrl
 */
$.OsmTileSource = function( width, height, tileSize, tileOverlap, tilesUrl ) {
    var options;

    if( $.isPlainObject( width ) ){
        options = width;
    }else{
        options = {
            width: arguments[0],
            height: arguments[1],
            tileSize: arguments[2],
            tileOverlap: arguments[3],
            tilesUrl: arguments[4]
        };
    }
    //apply default setting for standard public OpenStreatMaps service
    //but allow them to be specified so fliks can host there own instance
    //or apply against other services supportting the same standard
    if( !options.width || !options.height ){
        options.width = 65572864;
        options.height = 65572864;
    }
    if( !options.tileSize ){
        options.tileSize = 256;
        options.tileOverlap = 0;
    }
    if( !options.tilesUrl ){
        options.tilesUrl = "http://tile.openstreetmap.org/";
    }
    options.minLevel = 8;

    $.TileSource.apply( this, [ options ] );

};

$.extend( $.OsmTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.OsmTileSource.prototype */{


    /**
     * Determine if the data and/or url imply the image service is supported by
     * this tile source.
     * @function
     * @param {Object|Array} data
     * @param {String} optional - url
     */
    supports: function( data, url ){
        return (
            data.type &&
            "openstreetmaps" == data.type
        );
    },

    /**
     *
     * @function
     * @param {Object} data - the raw configuration
     * @param {String} url - the url the data was retreived from if any.
     * @return {Object} options - A dictionary of keyword arguments sufficient
     *      to configure this tile sources constructor.
     */
    configure: function( data, url ){
        return data;
    },


    /**
     * @function
     * @param {Number} level
     * @param {Number} x
     * @param {Number} y
     */
    getTileUrl: function( level, x, y ) {
        return this.tilesUrl + (level - 8) + "/" + x + "/" + y + ".png";
    }
});


}( OpenSeadragon ));

/*
 * OpenSeadragon - TmsTileSource
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Derived from the TMS tile source in Rainer Simon's seajax-utils project
 * <http://github.com/rsimon/seajax-utils>.  Rainer Simon has contributed
 * the included code to the OpenSeadragon project under the New BSD license;
 * see <https://github.com/openseadragon/openseadragon/issues/58>.
 */


(function( $ ){

/**
 * @class TmsTileSource
 * @classdesc A tilesource implementation for Tiled Map Services (TMS).
 * TMS tile scheme ( [ as supported by OpenLayers ] is described here
 * ( http://openlayers.org/dev/examples/tms.html ).
 *
 * @memberof OpenSeadragon
 * @extends OpenSeadragon.TileSource
 * @param {Number|Object} width - the pixel width of the image or the idiomatic
 *      options object which is used instead of positional arguments.
 * @param {Number} height
 * @param {Number} tileSize
 * @param {Number} tileOverlap
 * @param {String} tilesUrl
 */
$.TmsTileSource = function( width, height, tileSize, tileOverlap, tilesUrl ) {
    var options;

    if( $.isPlainObject( width ) ){
        options = width;
    }else{
        options = {
            width: arguments[0],
            height: arguments[1],
            tileSize: arguments[2],
            tileOverlap: arguments[3],
            tilesUrl: arguments[4]
        };
    }
    // TMS has integer multiples of 256 for width/height and adds buffer
    // if necessary -> account for this!
    var bufferedWidth = Math.ceil(options.width / 256) * 256,
        bufferedHeight = Math.ceil(options.height / 256) * 256,
        max;

    // Compute number of zoomlevels in this tileset
    if (bufferedWidth > bufferedHeight) {
        max = bufferedWidth / 256;
    } else {
        max = bufferedHeight / 256;
    }
    options.maxLevel = Math.ceil(Math.log(max)/Math.log(2)) - 1;
    options.tileSize = 256;
    options.width = bufferedWidth;
    options.height = bufferedHeight;

    $.TileSource.apply( this, [ options ] );

};

$.extend( $.TmsTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.TmsTileSource.prototype */{


    /**
     * Determine if the data and/or url imply the image service is supported by
     * this tile source.
     * @function
     * @param {Object|Array} data
     * @param {String} optional - url
     */
    supports: function( data, url ){
        return ( data.type && "tiledmapservice" == data.type );
    },

    /**
     *
     * @function
     * @param {Object} data - the raw configuration
     * @param {String} url - the url the data was retreived from if any.
     * @return {Object} options - A dictionary of keyword arguments sufficient
     *      to configure this tile sources constructor.
     */
    configure: function( data, url ){
        return data;
    },


    /**
     * @function
     * @param {Number} level
     * @param {Number} x
     * @param {Number} y
     */
    getTileUrl: function( level, x, y ) {
        // Convert from Deep Zoom definition to TMS zoom definition
        var yTiles = this.getNumTiles( level ).y - 1;

        return this.tilesUrl + level + "/" + x + "/" +  (yTiles - y) + ".png";
    }
});


}( OpenSeadragon ));

/*
 * OpenSeadragon - LegacyTileSource
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

/**
 * @class LegacyTileSource
 * @classdesc The LegacyTileSource allows simple, traditional image pyramids to be loaded
 * into an OpenSeadragon Viewer.  Basically, this translates to the historically
 * common practice of starting with a 'master' image, maybe a tiff for example,
 * and generating a set of 'service' images like one or more thumbnails, a medium
 * resolution image and a high resolution image in standard web formats like
 * png or jpg.
 *
 * @memberof OpenSeadragon
 * @extends OpenSeadragon.TileSource
 * @param {Array} levels An array of file descriptions, each is an object with
 *      a 'url', a 'width', and a 'height'.  Overriding classes can expect more
 *      properties but these properties are sufficient for this implementation.
 *      Additionally, the levels are required to be listed in order from
 *      smallest to largest.
 * @property {Number} aspectRatio
 * @property {Number} dimensions
 * @property {Number} tileSize
 * @property {Number} tileOverlap
 * @property {Number} minLevel
 * @property {Number} maxLevel
 * @property {Array}  levels
 */
$.LegacyTileSource = function( levels ) {

    var options,
        width,
        height;

    if( $.isArray( levels ) ){
        options = {
            type: 'legacy-image-pyramid',
            levels: levels
        };
    }

    //clean up the levels to make sure we support all formats
    options.levels = filterFiles( options.levels );

    if ( options.levels.length > 0 ) {
        width = options.levels[ options.levels.length - 1 ].width;
        height = options.levels[ options.levels.length - 1 ].height;
    }
    else {
        width = 0;
        height = 0;
        $.console.error( "No supported image formats found" );
    }

    $.extend( true, options, {
        width: width,
        height: height,
        tileSize: Math.max( height, width ),
        tileOverlap: 0,
        minLevel: 0,
        maxLevel: options.levels.length > 0 ? options.levels.length - 1 : 0
    } );

    $.TileSource.apply( this, [ options ] );

    this.levels = options.levels;
};

$.extend( $.LegacyTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.LegacyTileSource.prototype */{
    /**
     * Determine if the data and/or url imply the image service is supported by
     * this tile source.
     * @function
     * @param {Object|Array} data
     * @param {String} optional - url
     */
    supports: function( data, url ){
        return (
            data.type &&
            "legacy-image-pyramid" == data.type
        ) || (
            data.documentElement &&
            "legacy-image-pyramid" == data.documentElement.getAttribute('type')
        );
    },


    /**
     *
     * @function
     * @param {Object|XMLDocument} configuration - the raw configuration
     * @param {String} dataUrl - the url the data was retreived from if any.
     * @return {Object} options - A dictionary of keyword arguments sufficient
     *      to configure this tile sources constructor.
     */
    configure: function( configuration, dataUrl ){

        var options;

        if( !$.isPlainObject(configuration) ){

            options = configureFromXML( this, configuration );

        }else{

            options = configureFromObject( this, configuration );
        }

        return options;

    },

    /**
     * @function
     * @param {Number} level
     */
    getLevelScale: function ( level ) {
        var levelScale = NaN;
        if ( this.levels.length > 0 && level >= this.minLevel && level <= this.maxLevel ) {
            levelScale =
                this.levels[ level ].width /
                this.levels[ this.maxLevel ].width;
        }
        return levelScale;
    },

    /**
     * @function
     * @param {Number} level
     */
    getNumTiles: function( level ) {
        var scale = this.getLevelScale( level );
        if ( scale ){
            return new $.Point( 1, 1 );
        } else {
            return new $.Point( 0, 0 );
        }
    },

    /**
     * @function
     * @param {Number} level
     * @param {OpenSeadragon.Point} point
     */
    getTileAtPoint: function( level, point ) {
        return new $.Point( 0, 0 );
    },


    /**
     * This method is not implemented by this class other than to throw an Error
     * announcing you have to implement it.  Because of the variety of tile
     * server technologies, and various specifications for building image
     * pyramids, this method is here to allow easy integration.
     * @function
     * @param {Number} level
     * @param {Number} x
     * @param {Number} y
     * @throws {Error}
     */
    getTileUrl: function ( level, x, y ) {
        var url = null;
        if ( this.levels.length > 0 && level >= this.minLevel && level <= this.maxLevel ) {
            url = this.levels[ level ].url;
        }
        return url;
    }
} );

/**
 * This method removes any files from the Array which dont conform to our
 * basic requirements for a 'level' in the LegacyTileSource.
 * @private
 * @inner
 * @function
 */
function filterFiles( files ){
    var filtered = [],
        file,
        i;
    for( i = 0; i < files.length; i++ ){
        file = files[ i ];
        if( file.height &&
            file.width &&
            file.url && (
                file.url.toLowerCase().match(/^.*\.(png|jpg|jpeg|gif)$/) || (
                    file.mimetype &&
                    file.mimetype.toLowerCase().match(/^.*\/(png|jpg|jpeg|gif)$/)
                )
            ) ){
            //This is sufficient to serve as a level
            filtered.push({
                url: file.url,
                width: Number( file.width ),
                height: Number( file.height )
            });
        }
        else {
            $.console.error( 'Unsupported image format: %s', file.url ? file.url : '<no URL>' );
        }
    }

    return filtered.sort(function(a,b){
        return a.height - b.height;
    });

}

/**
 * @private
 * @inner
 * @function
 */
function configureFromXML( tileSource, xmlDoc ){

    if ( !xmlDoc || !xmlDoc.documentElement ) {
        throw new Error( $.getString( "Errors.Xml" ) );
    }

    var root         = xmlDoc.documentElement,
        rootName     = root.tagName,
        conf         = null,
        levels       = [],
        level,
        i;

    if ( rootName == "image" ) {

        try {
            conf = {
                type:        root.getAttribute( "type" ),
                levels:      []
            };

            levels = root.getElementsByTagName( "level" );
            for ( i = 0; i < levels.length; i++ ) {
                level = levels[ i ];

                conf.levels .push({
                    url:    level.getAttribute( "url" ),
                    width:  parseInt( level.getAttribute( "width" ), 10 ),
                    height: parseInt( level.getAttribute( "height" ), 10 )
                });
            }

            return configureFromObject( tileSource, conf );

        } catch ( e ) {
            throw (e instanceof Error) ?
                e :
                new Error( 'Unknown error parsing Legacy Image Pyramid XML.' );
        }
    } else if ( rootName == "collection" ) {
        throw new Error( 'Legacy Image Pyramid Collections not yet supported.' );
    } else if ( rootName == "error" ) {
        throw new Error( 'Error: ' + xmlDoc );
    }

    throw new Error( 'Unknown element ' + rootName );
}

/**
 * @private
 * @inner
 * @function
 */
function configureFromObject( tileSource, configuration ){

    return configuration.levels;

}

}( OpenSeadragon ));

/*
 * OpenSeadragon - TileSourceCollection
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

/**
 * @class TileSourceCollection
 * @memberof OpenSeadragon
 * @extends OpenSeadragon.TileSource
 */
$.TileSourceCollection = function( tileSize, tileSources, rows, layout  ) {
    var options;

    if( $.isPlainObject( tileSize ) ){
        options = tileSize;
    }else{
        options = {
            tileSize: arguments[ 0 ],
            tileSources: arguments[ 1 ],
            rows: arguments[ 2 ],
            layout: arguments[ 3 ]
        };
    }

    if( !options.layout ){
        options.layout = 'horizontal';
    }

    var minLevel = 0,
        levelSize = 1.0,
        tilesPerRow = Math.ceil( options.tileSources.length / options.rows ),
        longSide = tilesPerRow >= options.rows ?
            tilesPerRow :
            options.rows;

    if( 'horizontal' == options.layout ){
        options.width = ( options.tileSize ) * tilesPerRow;
        options.height = ( options.tileSize ) * options.rows;
    } else {
        options.height = ( options.tileSize ) * tilesPerRow;
        options.width = ( options.tileSize ) * options.rows;
    }

    options.tileOverlap = -options.tileMargin;
    options.tilesPerRow = tilesPerRow;

    //Set min level to avoid loading sublevels since collection is a
    //different kind of abstraction

    while( levelSize  <  ( options.tileSize ) * longSide ){
        //$.console.log( '%s levelSize %s minLevel %s', options.tileSize * longSide, levelSize, minLevel );
        levelSize = levelSize * 2.0;
        minLevel++;
    }
    options.minLevel = minLevel;

    //for( var name in options ){
    //    $.console.log( 'Collection %s %s', name, options[ name ] );
    //}

    $.TileSource.apply( this, [ options ] );

};

$.extend( $.TileSourceCollection.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.TileSourceCollection.prototype */{

    /**
     * @function
     * @param {Number} level
     * @param {Number} x
     * @param {Number} y
     */
    getTileBounds: function( level, x, y ) {
        var dimensionsScaled = this.dimensions.times( this.getLevelScale( level ) ),
            px = this.tileSize * x - this.tileOverlap,
            py = this.tileSize * y - this.tileOverlap,
            sx = this.tileSize + 1 * this.tileOverlap,
            sy = this.tileSize + 1 * this.tileOverlap,
            scale = 1.0 / dimensionsScaled.x;

        sx = Math.min( sx, dimensionsScaled.x - px );
        sy = Math.min( sy, dimensionsScaled.y - py );

        return new $.Rect( px * scale, py * scale, sx * scale, sy * scale );
    },

    /**
     *
     * @function
     */
    configure: function( data, url ){
        return;
    },


    /**
     * @function
     * @param {Number} level
     * @param {Number} x
     * @param {Number} y
     */
    getTileUrl: function( level, x, y ) {
        //$.console.log([  level, '/', x, '_', y ].join( '' ));
        return null;
    }


});


}( OpenSeadragon ));

/*
 * OpenSeadragon - Button
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

/**
 * An enumeration of button states
 * @member ButtonState
 * @memberof OpenSeadragon
 * @static
 * @type {Object}
 * @property {Number} REST
 * @property {Number} GROUP
 * @property {Number} HOVER
 * @property {Number} DOWN
 */
$.ButtonState = {
    REST:   0,
    GROUP:  1,
    HOVER:  2,
    DOWN:   3
};

/**
 * @class Button
 * @classdesc Manages events, hover states for individual buttons, tool-tips, as well
 * as fading the buttons out when the user has not interacted with them
 * for a specified period.
 *
 * @memberof OpenSeadragon
 * @extends OpenSeadragon.EventSource
 * @param {Object} options
 * @param {Element} [options.element=null] Element to use as the button. If not specified, an HTML &lt;button&gt; element is created.
 * @param {String} [options.tooltip=null] Provides context help for the button when the
 *  user hovers over it.
 * @param {String} [options.srcRest=null] URL of image to use in 'rest' state.
 * @param {String} [options.srcGroup=null] URL of image to use in 'up' state.
 * @param {String} [options.srcHover=null] URL of image to use in 'hover' state.
 * @param {String} [options.srcDown=null] URL of image to use in 'down' state.
 * @param {Number} [options.fadeDelay=0] How long to wait before fading.
 * @param {Number} [options.fadeLength=2000] How long should it take to fade the button.
 * @param {OpenSeadragon.EventHandler} [options.onPress=null] Event handler callback for {@link OpenSeadragon.Button.event:press}.
 * @param {OpenSeadragon.EventHandler} [options.onRelease=null] Event handler callback for {@link OpenSeadragon.Button.event:release}.
 * @param {OpenSeadragon.EventHandler} [options.onClick=null] Event handler callback for {@link OpenSeadragon.Button.event:click}.
 * @param {OpenSeadragon.EventHandler} [options.onEnter=null] Event handler callback for {@link OpenSeadragon.Button.event:enter}.
 * @param {OpenSeadragon.EventHandler} [options.onExit=null] Event handler callback for {@link OpenSeadragon.Button.event:exit}.
 * @param {OpenSeadragon.EventHandler} [options.onFocus=null] Event handler callback for {@link OpenSeadragon.Button.event:focus}.
 * @param {OpenSeadragon.EventHandler} [options.onBlur=null] Event handler callback for {@link OpenSeadragon.Button.event:blur}.
 */
$.Button = function( options ) {

    var _this = this;

    $.EventSource.call( this );

    $.extend( true, this, {

        tooltip:            null,
        srcRest:            null,
        srcGroup:           null,
        srcHover:           null,
        srcDown:            null,
        clickTimeThreshold: $.DEFAULT_SETTINGS.clickTimeThreshold,
        clickDistThreshold: $.DEFAULT_SETTINGS.clickDistThreshold,
        /**
         * How long to wait before fading.
         * @member {Number} fadeDelay
         * @memberof OpenSeadragon.Button#
         */
        fadeDelay:          0,
        /**
         * How long should it take to fade the button.
         * @member {Number} fadeLength
         * @memberof OpenSeadragon.Button#
         */
        fadeLength:         2000,
        onPress:            null,
        onRelease:          null,
        onClick:            null,
        onEnter:            null,
        onExit:             null,
        onFocus:            null,
        onBlur:             null

    }, options );

    /**
     * The button element.
     * @member {Element} element
     * @memberof OpenSeadragon.Button#
     */
    this.element        = options.element   || $.makeNeutralElement( "div" );

    //if the user has specified the element to bind the control to explicitly
    //then do not add the default control images
    if ( !options.element ) {
        this.imgRest      = $.makeTransparentImage( this.srcRest );
        this.imgGroup     = $.makeTransparentImage( this.srcGroup );
        this.imgHover     = $.makeTransparentImage( this.srcHover );
        this.imgDown      = $.makeTransparentImage( this.srcDown );

        this.imgRest.alt  =
        this.imgGroup.alt =
        this.imgHover.alt =
        this.imgDown.alt  =
            this.tooltip;

        this.element.style.position = "relative";

        this.imgGroup.style.position =
        this.imgHover.style.position =
        this.imgDown.style.position  =
            "absolute";

        this.imgGroup.style.top =
        this.imgHover.style.top =
        this.imgDown.style.top  =
            "0px";

        this.imgGroup.style.left =
        this.imgHover.style.left =
        this.imgDown.style.left  =
            "0px";

        this.imgHover.style.visibility =
        this.imgDown.style.visibility  =
            "hidden";

        if ( $.Browser.vendor == $.BROWSERS.FIREFOX  && $.Browser.version < 3 ){
            this.imgGroup.style.top =
            this.imgHover.style.top =
            this.imgDown.style.top  =
                "";
        }

        this.element.appendChild( this.imgRest );
        this.element.appendChild( this.imgGroup );
        this.element.appendChild( this.imgHover );
        this.element.appendChild( this.imgDown );
    }


    this.addHandler( "press",     this.onPress );
    this.addHandler( "release",   this.onRelease );
    this.addHandler( "click",     this.onClick );
    this.addHandler( "enter",     this.onEnter );
    this.addHandler( "exit",      this.onExit );
    this.addHandler( "focus",     this.onFocus );
    this.addHandler( "blur",      this.onBlur );

    /**
     * The button's current state.
     * @member {OpenSeadragon.ButtonState} currentState
     * @memberof OpenSeadragon.Button#
     */
    this.currentState = $.ButtonState.GROUP;

    // When the button last began to fade.
    this.fadeBeginTime  = null;
    // Whether this button should fade after user stops interacting with the viewport.
    this.shouldFade     = false;

    this.element.style.display  = "inline-block";
    this.element.style.position = "relative";
    this.element.title          = this.tooltip;

    /**
     * Tracks mouse/touch/key events on the button.
     * @member {OpenSeadragon.MouseTracker} tracker
     * @memberof OpenSeadragon.Button#
     */
    this.tracker = new $.MouseTracker({

        element:            this.element,
        clickTimeThreshold: this.clickTimeThreshold,
        clickDistThreshold: this.clickDistThreshold,

        enterHandler: function( event ) {
            if ( event.insideElementPressed ) {
                inTo( _this, $.ButtonState.DOWN );
                /**
                 * Raised when the cursor enters the Button element.
                 *
                 * @event enter
                 * @memberof OpenSeadragon.Button
                 * @type {object}
                 * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.
                 * @property {Object} originalEvent - The original DOM event.
                 * @property {?Object} userData - Arbitrary subscriber-defined object.
                 */
                _this.raiseEvent( "enter", { originalEvent: event.originalEvent } );
            } else if ( !event.buttonDownAny ) {
                inTo( _this, $.ButtonState.HOVER );
            }
        },

        focusHandler: function ( event ) {
            this.enterHandler( event );
            /**
             * Raised when the Button element receives focus.
             *
             * @event focus
             * @memberof OpenSeadragon.Button
             * @type {object}
             * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.
             * @property {Object} originalEvent - The original DOM event.
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            _this.raiseEvent( "focus", { originalEvent: event.originalEvent } );
        },

        exitHandler: function( event ) {
            outTo( _this, $.ButtonState.GROUP );
            if ( event.insideElementPressed ) {
                /**
                 * Raised when the cursor leaves the Button element.
                 *
                 * @event exit
                 * @memberof OpenSeadragon.Button
                 * @type {object}
                 * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.
                 * @property {Object} originalEvent - The original DOM event.
                 * @property {?Object} userData - Arbitrary subscriber-defined object.
                 */
                _this.raiseEvent( "exit", { originalEvent: event.originalEvent } );
            }
        },

        blurHandler: function ( event ) {
            this.exitHandler( event );
            /**
             * Raised when the Button element loses focus.
             *
             * @event blur
             * @memberof OpenSeadragon.Button
             * @type {object}
             * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.
             * @property {Object} originalEvent - The original DOM event.
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            _this.raiseEvent( "blur", { originalEvent: event.originalEvent } );
        },

        pressHandler: function ( event ) {
            inTo( _this, $.ButtonState.DOWN );
            /**
             * Raised when a mouse button is pressed or touch occurs in the Button element.
             *
             * @event press
             * @memberof OpenSeadragon.Button
             * @type {object}
             * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.
             * @property {Object} originalEvent - The original DOM event.
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            _this.raiseEvent( "press", { originalEvent: event.originalEvent } );
        },

        releaseHandler: function( event ) {
            if ( event.insideElementPressed && event.insideElementReleased ) {
                outTo( _this, $.ButtonState.HOVER );
                /**
                 * Raised when the mouse button is released or touch ends in the Button element.
                 *
                 * @event release
                 * @memberof OpenSeadragon.Button
                 * @type {object}
                 * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.
                 * @property {Object} originalEvent - The original DOM event.
                 * @property {?Object} userData - Arbitrary subscriber-defined object.
                 */
                _this.raiseEvent( "release", { originalEvent: event.originalEvent } );
            } else if ( event.insideElementPressed ) {
                outTo( _this, $.ButtonState.GROUP );
            } else {
                inTo( _this, $.ButtonState.HOVER );
            }
        },

        clickHandler: function( event ) {
            if ( event.quick ) {
                /**
                 * Raised when a mouse button is pressed and released or touch is initiated and ended in the Button element within the time and distance threshold.
                 *
                 * @event click
                 * @memberof OpenSeadragon.Button
                 * @type {object}
                 * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.
                 * @property {Object} originalEvent - The original DOM event.
                 * @property {?Object} userData - Arbitrary subscriber-defined object.
                 */
                _this.raiseEvent("click", { originalEvent: event.originalEvent });
            }
        },

        keyHandler: function( event ){
            //console.log( "%s : handling key %s!", _this.tooltip, event.keyCode);
            if( 13 === event.keyCode ){
                /***
                 * Raised when a mouse button is pressed and released or touch is initiated and ended in the Button element within the time and distance threshold.
                 *
                 * @event click
                 * @memberof OpenSeadragon.Button
                 * @type {object}
                 * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.
                 * @property {Object} originalEvent - The original DOM event.
                 * @property {?Object} userData - Arbitrary subscriber-defined object.
                 */
                _this.raiseEvent( "click", { originalEvent: event.originalEvent } );
                /***
                 * Raised when the mouse button is released or touch ends in the Button element.
                 *
                 * @event release
                 * @memberof OpenSeadragon.Button
                 * @type {object}
                 * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.
                 * @property {Object} originalEvent - The original DOM event.
                 * @property {?Object} userData - Arbitrary subscriber-defined object.
                 */
                _this.raiseEvent( "release", { originalEvent: event.originalEvent } );
                return false;
            }
            return true;
        }

    }).setTracking( true );

    outTo( this, $.ButtonState.REST );
};

$.extend( $.Button.prototype, $.EventSource.prototype, /** @lends OpenSeadragon.Button.prototype */{

    /**
     * TODO: Determine what this function is intended to do and if it's actually
     * useful as an API point.
     * @function
     */
    notifyGroupEnter: function() {
        inTo( this, $.ButtonState.GROUP );
    },

    /**
     * TODO: Determine what this function is intended to do and if it's actually
     * useful as an API point.
     * @function
     */
    notifyGroupExit: function() {
        outTo( this, $.ButtonState.REST );
    },

    /**
     * @function
     */
    disable: function(){
        this.notifyGroupExit();
        this.element.disabled = true;
        $.setElementOpacity( this.element, 0.2, true );
    },

    /**
     * @function
     */
    enable: function(){
        this.element.disabled = false;
        $.setElementOpacity( this.element, 1.0, true );
        this.notifyGroupEnter();
    }

});


function scheduleFade( button ) {
    $.requestAnimationFrame(function(){
        updateFade( button );
    });
}

function updateFade( button ) {
    var currentTime,
        deltaTime,
        opacity;

    if ( button.shouldFade ) {
        currentTime = $.now();
        deltaTime   = currentTime - button.fadeBeginTime;
        opacity     = 1.0 - deltaTime / button.fadeLength;
        opacity     = Math.min( 1.0, opacity );
        opacity     = Math.max( 0.0, opacity );

        if( button.imgGroup ){
            $.setElementOpacity( button.imgGroup, opacity, true );
        }
        if ( opacity > 0 ) {
            // fade again
            scheduleFade( button );
        }
    }
}

function beginFading( button ) {
    button.shouldFade = true;
    button.fadeBeginTime = $.now() + button.fadeDelay;
    window.setTimeout( function(){
        scheduleFade( button );
    }, button.fadeDelay );
}

function stopFading( button ) {
    button.shouldFade = false;
    if( button.imgGroup ){
        $.setElementOpacity( button.imgGroup, 1.0, true );
    }
}

function inTo( button, newState ) {

    if( button.element.disabled ){
        return;
    }

    if ( newState >= $.ButtonState.GROUP &&
         button.currentState == $.ButtonState.REST ) {
        stopFading( button );
        button.currentState = $.ButtonState.GROUP;
    }

    if ( newState >= $.ButtonState.HOVER &&
         button.currentState == $.ButtonState.GROUP ) {
        if( button.imgHover ){
            button.imgHover.style.visibility = "";
        }
        button.currentState = $.ButtonState.HOVER;
    }

    if ( newState >= $.ButtonState.DOWN &&
         button.currentState == $.ButtonState.HOVER ) {
        if( button.imgDown ){
            button.imgDown.style.visibility = "";
        }
        button.currentState = $.ButtonState.DOWN;
    }
}


function outTo( button, newState ) {

    if( button.element.disabled ){
        return;
    }

    if ( newState <= $.ButtonState.HOVER &&
         button.currentState == $.ButtonState.DOWN ) {
        if( button.imgDown ){
            button.imgDown.style.visibility = "hidden";
        }
        button.currentState = $.ButtonState.HOVER;
    }

    if ( newState <= $.ButtonState.GROUP &&
         button.currentState == $.ButtonState.HOVER ) {
        if( button.imgHover ){
            button.imgHover.style.visibility = "hidden";
        }
        button.currentState = $.ButtonState.GROUP;
    }

    if ( newState <= $.ButtonState.REST &&
         button.currentState == $.ButtonState.GROUP ) {
        beginFading( button );
        button.currentState = $.ButtonState.REST;
    }
}


}( OpenSeadragon ));

/*
 * OpenSeadragon - ButtonGroup
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){
/**
 * @class ButtonGroup
 * @classdesc Manages events on groups of buttons.
 *
 * @memberof OpenSeadragon
 * @param {Object} options - A dictionary of settings applied against the entire group of buttons.
 * @param {Array} options.buttons Array of buttons
 * @param {Element} [options.element] Element to use as the container
 **/
$.ButtonGroup = function( options ) {

    $.extend( true, this, {
        /**
         * An array containing the buttons themselves.
         * @member {Array} buttons
         * @memberof OpenSeadragon.ButtonGroup#
         */
        buttons:            [],
        clickTimeThreshold: $.DEFAULT_SETTINGS.clickTimeThreshold,
        clickDistThreshold: $.DEFAULT_SETTINGS.clickDistThreshold,
        labelText:          ""
    }, options );

    // copy the button elements  TODO: Why?
    var buttons = this.buttons.concat([]),
        _this = this,
        i;

    /**
     * The shared container for the buttons.
     * @member {Element} element
     * @memberof OpenSeadragon.ButtonGroup#
     */
    this.element = options.element || $.makeNeutralElement( "div" );

    // TODO What if there IS an options.group specified? 
    if( !options.group ){
        this.label   = $.makeNeutralElement( "label" );
        //TODO: support labels for ButtonGroups
        //this.label.innerHTML = this.labelText;
        this.element.style.display = "inline-block";
        this.element.appendChild( this.label );
        for ( i = 0; i < buttons.length; i++ ) {
            this.element.appendChild( buttons[ i ].element );
        }
    }

    /**
     * Tracks mouse/touch/key events accross the group of buttons.
     * @member {OpenSeadragon.MouseTracker} tracker
     * @memberof OpenSeadragon.ButtonGroup#
     */
    this.tracker = new $.MouseTracker({
        element:            this.element,
        clickTimeThreshold: this.clickTimeThreshold,
        clickDistThreshold: this.clickDistThreshold,
        enterHandler: function ( event ) {
            var i;
            for ( i = 0; i < _this.buttons.length; i++ ) {
                _this.buttons[ i ].notifyGroupEnter();
            }
        },
        exitHandler: function ( event ) {
            var i;
            if ( !event.insideElementPressed ) {
                for ( i = 0; i < _this.buttons.length; i++ ) {
                    _this.buttons[ i ].notifyGroupExit();
                }
            }
        },
        releaseHandler: function ( event ) {
            var i;
            if ( !event.insideElementReleased ) {
                for ( i = 0; i < _this.buttons.length; i++ ) {
                    _this.buttons[ i ].notifyGroupExit();
                }
            }
        }
    }).setTracking( true );
};

$.ButtonGroup.prototype = /** @lends OpenSeadragon.ButtonGroup.prototype */{

    /**
     * TODO: Figure out why this is used on the public API and if a more useful
     * api can be created.
     * @function
     * @private
     */
    emulateEnter: function() {
        this.tracker.enterHandler( { eventSource: this.tracker } );
    },

    /**
     * TODO: Figure out why this is used on the public API and if a more useful
     * api can be created.
     * @function
     * @private
     */
    emulateExit: function() {
        this.tracker.exitHandler( { eventSource: this.tracker } );
    }
};


}( OpenSeadragon ));

/*
 * OpenSeadragon - Rect
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

/**
 * @class Rect
 * @classdesc A Rectangle really represents a 2x2 matrix where each row represents a
 * 2 dimensional vector component, the first is (x,y) and the second is
 * (width, height).  The latter component implies the equation of a simple
 * plane.
 *
 * @memberof OpenSeadragon
 * @param {Number} x The vector component 'x'.
 * @param {Number} y The vector component 'y'.
 * @param {Number} width The vector component 'height'.
 * @param {Number} height The vector component 'width'.
 */
$.Rect = function( x, y, width, height ) {
    /**
     * The vector component 'x'.
     * @member {Number} x
     * @memberof OpenSeadragon.Rect#
     */
    this.x = typeof ( x ) == "number" ? x : 0;
    /**
     * The vector component 'y'.
     * @member {Number} y
     * @memberof OpenSeadragon.Rect#
     */
    this.y = typeof ( y ) == "number" ? y : 0;
    /**
     * The vector component 'width'.
     * @member {Number} width
     * @memberof OpenSeadragon.Rect#
     */
    this.width  = typeof ( width )  == "number" ? width : 0;
    /**
     * The vector component 'height'.
     * @member {Number} height
     * @memberof OpenSeadragon.Rect#
     */
    this.height = typeof ( height ) == "number" ? height : 0;
};

$.Rect.prototype = /** @lends OpenSeadragon.Rect.prototype */{

    /**
     * The aspect ratio is simply the ratio of width to height.
     * @function
     * @returns {Number} The ratio of width to height.
     */
    getAspectRatio: function() {
        return this.width / this.height;
    },

    /**
     * Provides the coordinates of the upper-left corner of the rectangle as a
     * point.
     * @function
     * @returns {OpenSeadragon.Point} The coordinate of the upper-left corner of
     *  the rectangle.
     */
    getTopLeft: function() {
        return new $.Point(
            this.x,
            this.y
        );
    },

    /**
     * Provides the coordinates of the bottom-right corner of the rectangle as a
     * point.
     * @function
     * @returns {OpenSeadragon.Point} The coordinate of the bottom-right corner of
     *  the rectangle.
     */
    getBottomRight: function() {
        return new $.Point(
            this.x + this.width,
            this.y + this.height
        );
    },

    /**
     * Provides the coordinates of the top-right corner of the rectangle as a
     * point.
     * @function
     * @returns {OpenSeadragon.Point} The coordinate of the top-right corner of
     *  the rectangle.
     */
    getTopRight: function() {
        return new $.Point(
            this.x + this.width,
            this.y
        );
    },

    /**
     * Provides the coordinates of the bottom-left corner of the rectangle as a
     * point.
     * @function
     * @returns {OpenSeadragon.Point} The coordinate of the bottom-left corner of
     *  the rectangle.
     */
    getBottomLeft: function() {
        return new $.Point(
            this.x,
            this.y + this.height
        );
    },

    /**
     * Computes the center of the rectangle.
     * @function
     * @returns {OpenSeadragon.Point} The center of the rectangle as represented
     *  as represented by a 2-dimensional vector (x,y)
     */
    getCenter: function() {
        return new $.Point(
            this.x + this.width / 2.0,
            this.y + this.height / 2.0
        );
    },

    /**
     * Returns the width and height component as a vector OpenSeadragon.Point
     * @function
     * @returns {OpenSeadragon.Point} The 2 dimensional vector representing the
     *  the width and height of the rectangle.
     */
    getSize: function() {
        return new $.Point( this.width, this.height );
    },

    /**
     * Determines if two Rectangles have equivalent components.
     * @function
     * @param {OpenSeadragon.Rect} rectangle The Rectangle to compare to.
     * @return {Boolean} 'true' if all components are equal, otherwise 'false'.
     */
    equals: function( other ) {
        return ( other instanceof $.Rect ) &&
            ( this.x === other.x ) &&
            ( this.y === other.y ) &&
            ( this.width === other.width ) &&
            ( this.height === other.height );
    },

    /**
     * Rotates a rectangle around a point. Currently only 90, 180, and 270
     * degrees are supported.
     * @function
     * @param {Number} degrees The angle in degrees to rotate.
     * @param {OpenSeadragon.Point} pivot The point about which to rotate.
     * Defaults to the center of the rectangle.
     * @return {OpenSeadragon.Rect}
     */
    rotate: function( degrees, pivot ) {
        // TODO support arbitrary rotation
        var width = this.width,
            height = this.height,
            newTopLeft;

        degrees = ( degrees + 360 ) % 360;
        if( degrees % 90 !== 0 ) {
            throw new Error('Currently only 0, 90, 180, and 270 degrees are supported.');
        }

        if( degrees === 0 ){
            return new $.Rect(
                this.x,
                this.y,
                this.width,
                this.height
            );
        }

        pivot = pivot || this.getCenter();

        switch ( degrees ) {
            case 90:
                newTopLeft = this.getBottomLeft();
                width = this.height;
                height = this.width;
                break;
            case 180:
                newTopLeft = this.getBottomRight();
                break;
            case 270:
                newTopLeft = this.getTopRight();
                width = this.height;
                height = this.width;
                break;
            default:
                newTopLeft = this.getTopLeft();
                break;
        }

        newTopLeft = newTopLeft.rotate(degrees, pivot);

        return new $.Rect(newTopLeft.x, newTopLeft.y, width, height);
    },

    /**
     * Provides a string representation of the rectangle which is useful for
     * debugging.
     * @function
     * @returns {String} A string representation of the rectangle.
     */
    toString: function() {
        return "[" +
            Math.round(this.x*100) + "," +
            Math.round(this.y*100) + "," +
            Math.round(this.width*100) + "x" +
            Math.round(this.height*100) +
        "]";
    }
};


}( OpenSeadragon ));

/*
 * OpenSeadragon - ReferenceStrip
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function ( $ ) {

// dictionary from id to private properties
var THIS = {};

/**
 *  The CollectionDrawer is a reimplementation if the Drawer API that
 *  focuses on allowing a viewport to be redefined as a collection
 *  of smaller viewports, defined by a clear number of rows and / or
 *  columns of which each item in the matrix of viewports has its own
 *  source.
 *
 *  This idea is a reexpression of the idea of dzi collections
 *  which allows a clearer algorithm to reuse the tile sources already
 *  supported by OpenSeadragon, in heterogenious or homogenious
 *  sequences just like mixed groups already supported by the viewer
 *  for the purpose of image sequnces.
 *
 *  TODO:   The difficult part of this feature is figuring out how to express
 *          this functionality as a combination of the functionality already
 *          provided by Drawer, Viewport, TileSource, and Navigator.  It may
 *          require better abstraction at those points in order to effeciently
 *          reuse those paradigms.
 */
/**
 * @class ReferenceStrip
 * @memberof OpenSeadragon
 * @param {Object} options
 */
$.ReferenceStrip = function ( options ) {

    var _this       = this,
        viewer      = options.viewer,
        viewerSize  = $.getElementSize( viewer.element ),
        element,
        style,
        i;

    //We may need to create a new element and id if they did not
    //provide the id for the existing element
    if ( !options.id ) {
        options.id              = 'referencestrip-' + $.now();
        this.element            = $.makeNeutralElement( "div" );
        this.element.id         = options.id;
        this.element.className  = 'referencestrip';
    }

    options = $.extend( true, {
        sizeRatio:           $.DEFAULT_SETTINGS.referenceStripSizeRatio,
        position:            $.DEFAULT_SETTINGS.referenceStripPosition,
        scroll:              $.DEFAULT_SETTINGS.referenceStripScroll,
        width:               $.DEFAULT_SETTINGS.referenceStripWidth,
        height:              $.DEFAULT_SETTINGS.referenceStripHeight,
        backgroundColor:     $.DEFAULT_SETTINGS.referenceStripBackgroundColor,
        clickTimeThreshold:  $.DEFAULT_SETTINGS.clickTimeThreshold
    }, options, {
        //required overrides
        element:                this.element,
        //These need to be overridden to prevent recursion since
        //the navigator is a viewer and a viewer has a navigator
        showNavigator:          false,
        mouseNavEnabled:        false,
        showNavigationControl:  false,
        showSequenceControl:    false
    } );

    $.extend( this, options );
    //Private state properties
    THIS[this.id] = {
        "animating":           false
    };

    this.minPixelRatio = this.viewer.minPixelRatio;

    style = this.element.style;
    style.marginTop     = '0px';
    style.marginRight   = '0px';
    style.marginBottom  = '0px';
    style.marginLeft    = '0px';
    style.left          = '0px';
    style.bottom        = '0px';
    style.border        = '0px';
    style.position      = 'relative';
    style.backgroundColor = this.backgroundColor;

    $.setElementOpacity( this.element, 0.8 );

    this.viewer = viewer;
    if (this.position === 'OUTSIDE') {
        this.innerTracker = new $.MouseTracker( {
            element:        this.element,
            dragHandler:    $.delegate( this, onStripDrag ),
            scrollHandler:  $.delegate( this, onOutsideStripScroll ),
            keyHandler:     $.delegate( this, onKeyPress )
        } ).setTracking( true );
    } else {
        this.innerTracker = new $.MouseTracker( {
            element:        this.element,
            dragHandler:    $.delegate( this, onStripDrag ),
            scrollHandler:  $.delegate( this, onStripScroll ),
            enterHandler:   $.delegate( this, onStripEnter ),
            exitHandler:    $.delegate( this, onStripExit ),
            keyHandler:     $.delegate( this, onKeyPress )
        } ).setTracking( true );
    }


    //Controls the position and orientation of the reference strip and sets the
    //appropriate width and height
    if (this.position === 'OUTSIDE' && this.scroll === 'vertical') {

        viewer.addControl(
            this.element, {
                anchor: $.ControlAnchor.ABSOLUTE,
                height: viewerSize.y,
                width: options.width,
                position: this.position,
                autoFade: false
            }
        );

        viewer.canvas.style.marginLeft = options.width + 'px';
        viewer.canvas.style.width = (viewer.canvas.offsetWidth - options.width) + 'px';

    } else if ( options.width && options.height ) {
        this.element.style.width  = options.width + 'px';
        this.element.style.height = options.height + 'px';

        viewer.addControl(
            this.element,
            { anchor: $.ControlAnchor.BOTTOM_LEFT }
        );

    } else {
        if ( "horizontal" == options.scroll ) {
            this.element.style.width = (
                viewerSize.x *
                options.sizeRatio *
                viewer.tileSources.length
            ) + ( 12 * viewer.tileSources.length ) + 'px';

            this.element.style.height = (
                viewerSize.y *
                options.sizeRatio
            ) + 'px';

            viewer.addControl(
                this.element,
                { anchor: $.ControlAnchor.BOTTOM_LEFT }
            );
        } else {
            this.element.style.height = (
                viewerSize.y *
                options.sizeRatio *
                viewer.tileSources.length
            ) + ( 12 * viewer.tileSources.length ) + 'px';

            this.element.style.width = (
                viewerSize.x *
                options.sizeRatio
            ) + 'px';

            viewer.addControl(
                this.element,
                { anchor: $.ControlAnchor.TOP_LEFT }
            );

        }
    }

    if (this.scroll === 'vertical' &&  this.position === 'OUTSIDE') {
        this.panelWidth = this.panelHeight = this.width - 15;
    } else {
        this.panelWidth = ( viewerSize.x * this.sizeRatio ) + 8;
        this.panelHeight = ( viewerSize.y * this.sizeRatio ) + 8;
    }

    this.panels = [];

    /*jshint loopfunc:true*/
    for ( i = 0; i < viewer.tileSources.length; i++ ) {

        element = $.makeNeutralElement( 'div' );
        element.id = this.element.id + "-" + i;

        element.style.width         = _this.panelWidth + 'px';
        element.style.height        = _this.panelHeight + 'px';
        element.style.display       = 'inline';
        element.style.float         = 'left'; //Webkit
        element.style.cssFloat      = 'left'; //Firefox
        element.style.styleFloat    = 'left'; //IE
        element.style.padding       = '2px';

        element.innerTracker = new $.MouseTracker( {
            element:            element,
            clickTimeThreshold: this.clickTimeThreshold,
            clickDistThreshold: this.clickDistThreshold,
            pressHandler: function ( event ) {
                event.eventSource.dragging = $.now();
            },
            releaseHandler: function ( event ) {
                var tracker = event.eventSource,
                    id      = tracker.element.id,
                    page    = Number( id.split( '-' )[2] ),
                    now     = $.now();

                if ( event.insideElementPressed &&
                     event.insideElementReleased &&
                     tracker.dragging &&
                     ( now - tracker.dragging ) < tracker.clickTimeThreshold ) {
                    tracker.dragging = null;
                    viewer.goToPage( page );
                }
            }
        } ).setTracking( true );

        this.element.appendChild( element );

        element.activePanel = false;

        this.panels.push( element );

    }
    loadPanels( this, this.scroll == 'vertical' ? viewerSize.y : viewerSize.y, 0 );
    this.setFocus( 0 );

};

$.extend( $.ReferenceStrip.prototype, $.EventSource.prototype, $.Viewer.prototype, /** @lends OpenSeadragon.ReferenceStrip.prototype */{

    /**
     * @function
     */
    setFocus: function ( page ) {
        var element      = $.getElement( this.element.id + '-' + page ),
            viewerSize   = $.getElementSize( this.viewer.canvas ),
            scrollWidth  = Number( this.element.style.width.replace( 'px', '' ) ),
            scrollHeight = Number( this.element.style.height.replace( 'px', '' ) ),
            offsetLeft   = -Number( this.element.style.marginLeft.replace( 'px', '' ) ),
            offsetTop    = -Number( this.element.style.marginTop.replace( 'px', '' ) ),
            offset;

        if ( this.currentSelected !== element ) {
            if ( this.currentSelected ) {
                this.currentSelected.style.background = this.backgroundColor;
            }
            this.currentSelected = element;
            this.currentSelected.style.background = '#bbb';

            if ( 'horizontal' == this.scroll ) {
                //right left
                offset = ( Number( page ) ) * ( this.panelWidth + 3 );
                if ( offset > offsetLeft + viewerSize.x - this.panelWidth ) {
                    offset = Math.min( offset, ( scrollWidth - viewerSize.x ) );
                    this.element.style.marginLeft = -offset + 'px';
                    loadPanels( this, viewerSize.x, -offset );
                } else if ( offset < offsetLeft ) {
                    offset = Math.max( 0, offset - viewerSize.x / 2 );
                    this.element.style.marginLeft = -offset + 'px';
                    loadPanels( this, viewerSize.x, -offset );
                }
            } else {
                offset = ( Number( page ) ) * ( this.panelHeight + 3 );

                if (this.position === 'OUTSIDE') {
                    this.element.parentNode.scrollTop = offset;
                    loadPanels( this, viewerSize.y, -offset );
                } else {
                    if ( offset > offsetTop + viewerSize.y - this.panelHeight ) {
                        offset = Math.min( offset, ( scrollHeight - viewerSize.y ) );
                        this.element.style.marginTop = -offset + 'px';
                        loadPanels( this, viewerSize.y, -offset );
                    } else if ( offset < offsetTop ) {
                        offset = Math.max( 0, offset - viewerSize.y / 2 );
                        this.element.style.marginTop = -offset + 'px';
                        loadPanels( this, viewerSize.y, -offset );
                    }
                }

            }

            this.currentPage = page;
            $.getElement( element.id + '-displayregion' ).focus();
            onStripEnter.call( this, { eventSource: this.innerTracker } );
        }
    },

    /**
     * @function
     */
    update: function () {
        if ( THIS[this.id].animating ) {
            $.console.log( 'image reference strip update' );
            return true;
        }
        return false;
    }

} );


/**
 * @private
 * @inner
 * @function
 */
function onStripDrag( event ) {

    var offsetLeft   = Number( this.element.style.marginLeft.replace( 'px', '' ) ),
        offsetTop    = Number( this.element.style.marginTop.replace( 'px', '' ) ),
        scrollWidth  = Number( this.element.style.width.replace( 'px', '' ) ),
        scrollHeight = Number( this.element.style.height.replace( 'px', '' ) ),
        viewerSize   = $.getElementSize( this.viewer.canvas );

    this.dragging = true;
    if ( this.element ) {
        if ( 'horizontal' == this.scroll ) {
            if ( -event.delta.x > 0 ) {
                //forward
                if ( offsetLeft > -( scrollWidth - viewerSize.x ) ) {
                    this.element.style.marginLeft = ( offsetLeft + ( event.delta.x * 2 ) ) + 'px';
                    loadPanels( this, viewerSize.x, offsetLeft + ( event.delta.x * 2 ) );
                }
            } else if ( -event.delta.x < 0 ) {
                //reverse
                if ( offsetLeft < 0 ) {
                    this.element.style.marginLeft = ( offsetLeft + ( event.delta.x * 2 ) ) + 'px';
                    loadPanels( this, viewerSize.x, offsetLeft + ( event.delta.x * 2 ) );
                }
            }
        } else {
            if ( -event.delta.y > 0 ) {
                //forward
                if ( offsetTop > -( scrollHeight - viewerSize.y ) ) {
                    this.element.style.marginTop = ( offsetTop + ( event.delta.y * 2 ) ) + 'px';
                    loadPanels( this, viewerSize.y, offsetTop + ( event.delta.y * 2 ) );
                }
            } else if ( -event.delta.y < 0 ) {
                //reverse
                if ( offsetTop < 0 ) {
                    this.element.style.marginTop = ( offsetTop + ( event.delta.y * 2 ) ) + 'px';
                    loadPanels( this, viewerSize.y, offsetTop + ( event.delta.y * 2 ) );
                }
            }
        }
    }
    return false;

}


/**
 * @private
 * @inner
 * @function
 */
function onStripScroll( event ) {
    var offsetLeft   = Number( this.element.style.marginLeft.replace( 'px', '' ) ),
        offsetTop    = Number( this.element.style.marginTop.replace( 'px', '' ) ),
        scrollWidth  = Number( this.element.style.width.replace( 'px', '' ) ),
        scrollHeight = Number( this.element.style.height.replace( 'px', '' ) ),
        viewerSize   = $.getElementSize( this.viewer.canvas );

    if ( this.element ) {
        if ( 'horizontal' == this.scroll ) {
            if ( event.scroll > 0 ) {
                //forward
                if ( offsetLeft > -( scrollWidth - viewerSize.x ) ) {
                    this.element.style.marginLeft = ( offsetLeft - ( event.scroll * 60 ) ) + 'px';
                    loadPanels( this, viewerSize.x, offsetLeft - ( event.scroll * 60 ) );
                }
            } else if ( event.scroll < 0 ) {
                //reverse
                if ( offsetLeft < 0 ) {
                    this.element.style.marginLeft = ( offsetLeft - ( event.scroll * 60 ) ) + 'px';
                    loadPanels( this, viewerSize.x, offsetLeft - ( event.scroll * 60 ) );
                }
            }
        } else {

            if ( event.scroll < 0 ) {
                //scroll up
                if ( offsetTop > viewerSize.y - scrollHeight ) {
                    this.element.style.marginTop = ( offsetTop + ( event.scroll * 60 ) ) + 'px';
                    loadPanels( this, viewerSize.y, offsetTop + ( event.scroll * 60 ) );
                }

            } else if ( event.scroll > 0 ) {
                //scroll dowm
                if ( offsetTop < 0 ) {
                    this.element.style.marginTop = ( offsetTop + ( event.scroll * 60 ) ) + 'px';
                    loadPanels( this, viewerSize.y, offsetTop + ( event.scroll * 60 ) );
                }
            }
        }
    }

    //cancels event
    return false;
}


/**
 * @private
 * @inner
 * @function
 */
function onOutsideStripScroll(event) {
    var scrollTop = this.element.parentNode.scrollTop,
        viewerSize = $.getElementSize(this.viewer.canvas);

    if (this.element) {
        if ('horizontal' === this.scroll) {
            loadPanels( this, viewerSize.x, scrollTop);
        } else {
            loadPanels( this, viewerSize.y, scrollTop);
        }
    }
}


/**
 * @private
 * @inner
 * @function
 */
function loadPanels( strip, viewerSize, scroll ) {
    var panelSize,
        activePanelsStart,
        activePanelsEnd,
        miniViewer,
        style,
        i,
        element;
    if ( 'horizontal' == strip.scroll ) {
        panelSize = strip.panelWidth;
    } else {
        panelSize = strip.panelHeight;
    }
    activePanelsStart = Math.ceil( viewerSize / panelSize ) + 5;
    activePanelsEnd = Math.ceil( ( Math.abs( scroll ) + viewerSize ) / panelSize ) + 1;
    activePanelsStart = activePanelsEnd - activePanelsStart;
    activePanelsStart = activePanelsStart < 0 ? 0 : activePanelsStart;

    for ( i = activePanelsStart; i < activePanelsEnd && i < strip.panels.length; i++ ) {
        element = strip.panels[i];
        if ( !element.activePanel ) {
            miniViewer = new $.Viewer( {
                id:                     element.id,
                tileSources:            [strip.viewer.tileSources[i]],
                element:                element,
                navigatorSizeRatio:     strip.sizeRatio,
                showNavigator:          false,
                mouseNavEnabled:        false,
                showNavigationControl:  false,
                showSequenceControl:    false,
                immediateRender:        true,
                blendTime:              0,
                animationTime:          0
            } );

            miniViewer.displayRegion           = $.makeNeutralElement( "textarea" );
            miniViewer.displayRegion.id        = element.id + '-displayregion';
            miniViewer.displayRegion.className = 'displayregion';

            style               = miniViewer.displayRegion.style;
            style.position      = 'relative';
            style.top           = '0px';
            style.left          = '0px';
            style.fontSize      = '0px';
            style.overflow      = 'hidden';
            style.float         = 'left'; //Webkit
            style.cssFloat      = 'left'; //Firefox
            style.styleFloat    = 'left'; //IE
            style.zIndex        = 999999999;
            style.cursor        = 'default';
            style.width         = '100%';
            style.height        = '100%';
            style.resize        = 'none';
            style.outline       = 'none';

            miniViewer.displayRegion.innerTracker = new $.MouseTracker( {
                element: miniViewer.displayRegion
            } );

            element.getElementsByTagName( 'div' )[0].appendChild(
                miniViewer.displayRegion
            );

            element.activePanel = true;
        }
    }
}


/**
 * @private
 * @inner
 * @function
 */
function onStripEnter( event ) {
    var element = event.eventSource.element;

    //$.setElementOpacity(element, 0.8);

    //element.style.border = '1px solid #555';
    //element.style.background = '#000';

    if ( 'horizontal' == this.scroll ) {

        //element.style.paddingTop = "0px";
        element.style.marginBottom = "0px";

    } else {

        //element.style.paddingRight = "0px";
        element.style.marginLeft = "0px";

    }
    return false;
}


/**
 * @private
 * @inner
 * @function
 */
function onStripExit( event ) {
    var element = event.eventSource.element;

    if ( 'horizontal' == this.scroll ) {

        //element.style.paddingTop = "10px";
        element.style.marginBottom = "-" + ( $.getElementSize( element ).y / 2 ) + "px";

    } else {

        //element.style.paddingRight = "10px";
        element.style.marginLeft = "-" + ( $.getElementSize( element ).x / 2 ) + "px";

    }
    return false;
}


/**
 * @private
 * @inner
 * @function
 */
function onKeyPress( event ) {
    //console.log( event.keyCode );

    switch ( event.keyCode ) {
        case 61: //=|+
            onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: 1, shift: null } );
            return false;
        case 45: //-|_
            onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: -1, shift: null } );
            return false;
        case 48: //0|)
        case 119: //w
        case 87: //W
        case 38: //up arrow
            onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: 1, shift: null } );
            return false;
        case 115: //s
        case 83: //S
        case 40: //down arrow
            onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: -1, shift: null } );
            return false;
        case 97: //a
        case 37: //left arrow
            onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: -1, shift: null } );
            return false;
        case 100: //d
        case 39: //right arrow
            onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: 1, shift: null } );
            return false;
        default:
            //console.log( 'navigator keycode %s', event.keyCode );
            return true;
    }
}


} ( OpenSeadragon ) );

/*
 * OpenSeadragon - DisplayRect
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

/**
 * @class DisplayRect
 * @classdesc A display rectangle is very similar to {@link OpenSeadragon.Rect} but adds two
 * fields, 'minLevel' and 'maxLevel' which denote the supported zoom levels
 * for this rectangle.
 *
 * @memberof OpenSeadragon
 * @extends OpenSeadragon.Rect
 * @param {Number} x The vector component 'x'.
 * @param {Number} y The vector component 'y'.
 * @param {Number} width The vector component 'height'.
 * @param {Number} height The vector component 'width'.
 * @param {Number} minLevel The lowest zoom level supported.
 * @param {Number} maxLevel The highest zoom level supported.
 */
$.DisplayRect = function( x, y, width, height, minLevel, maxLevel ) {
    $.Rect.apply( this, [ x, y, width, height ] );

    /**
     * The lowest zoom level supported.
     * @member {Number} minLevel
     * @memberof OpenSeadragon.DisplayRect#
     */
    this.minLevel = minLevel;
    /**
     * The highest zoom level supported.
     * @member {Number} maxLevel
     * @memberof OpenSeadragon.DisplayRect#
     */
    this.maxLevel = maxLevel;
};

$.extend( $.DisplayRect.prototype, $.Rect.prototype );

}( OpenSeadragon ));

/*
 * OpenSeadragon - Spring
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

/**
 * @class Spring
 * @memberof OpenSeadragon
 * @param {Object} options - Spring configuration settings.
 * @param {Number} options.initial - Initial value of spring, default to 0 so
 *  spring is not in motion initally by default.
 * @param {Number} options.springStiffness - Spring stiffness.
 * @param {Number} options.animationTime - Animation duration per spring.
 */
$.Spring = function( options ) {
    var args = arguments;

    if( typeof( options ) != 'object' ){
        //allows backward compatible use of ( initialValue, config ) as
        //constructor parameters
        options = {
            initial: args.length && typeof ( args[ 0 ] ) == "number" ?
                args[ 0 ] :
                0,
            /**
             * Spring stiffness.
             * @member {Number} springStiffness
             * @memberof OpenSeadragon.Spring#
             */
            springStiffness: args.length > 1 ?
                args[ 1 ].springStiffness :
                5.0,
            /**
             * Animation duration per spring.
             * @member {Number} animationTime
             * @memberof OpenSeadragon.Spring#
             */
            animationTime: args.length > 1 ?
                args[ 1 ].animationTime :
                1.5
        };
    }

    $.extend( true, this, options);

    /**
     * @member {Object} current
     * @memberof OpenSeadragon.Spring#
     * @property {Number} value
     * @property {Number} time
     */
    this.current = {
        value: typeof ( this.initial ) == "number" ?
            this.initial :
            0,
        time:  $.now() // always work in milliseconds
    };

    /**
     * @member {Object} start
     * @memberof OpenSeadragon.Spring#
     * @property {Number} value
     * @property {Number} time
     */
    this.start = {
        value: this.current.value,
        time:  this.current.time
    };

    /**
     * @member {Object} target
     * @memberof OpenSeadragon.Spring#
     * @property {Number} value
     * @property {Number} time
     */
    this.target = {
        value: this.current.value,
        time:  this.current.time
    };
};

$.Spring.prototype = /** @lends OpenSeadragon.Spring.prototype */{

    /**
     * @function
     * @param {Number} target
     */
    resetTo: function( target ) {
        this.target.value = target;
        this.target.time  = this.current.time;
        this.start.value  = this.target.value;
        this.start.time   = this.target.time;
    },

    /**
     * @function
     * @param {Number} target
     */
    springTo: function( target ) {
        this.start.value  = this.current.value;
        this.start.time   = this.current.time;
        this.target.value = target;
        this.target.time  = this.start.time + 1000 * this.animationTime;
    },

    /**
     * @function
     * @param {Number} delta
     */
    shiftBy: function( delta ) {
        this.start.value  += delta;
        this.target.value += delta;
    },

    /**
     * @function
     */
    update: function() {
        this.current.time  = $.now();
        this.current.value = (this.current.time >= this.target.time) ?
            this.target.value :
            this.start.value +
                ( this.target.value - this.start.value ) *
                transform(
                    this.springStiffness,
                    ( this.current.time - this.start.time ) /
                    ( this.target.time  - this.start.time )
                );
    }
};

/**
 * @private
 */
function transform( stiffness, x ) {
    return ( 1.0 - Math.exp( stiffness * -x ) ) /
        ( 1.0 - Math.exp( -stiffness ) );
}

}( OpenSeadragon ));

/*
 * OpenSeadragon - Tile
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){
    var TILE_CACHE       = {};
/**
 * @class Tile
 * @memberof OpenSeadragon
 * @param {Number} level The zoom level this tile belongs to.
 * @param {Number} x The vector component 'x'.
 * @param {Number} y The vector component 'y'.
 * @param {OpenSeadragon.Point} bounds Where this tile fits, in normalized
 *      coordinates.
 * @param {Boolean} exists Is this tile a part of a sparse image? ( Also has
 *      this tile failed to load? )
 * @param {String} url The URL of this tile's image.
 */
$.Tile = function(level, x, y, bounds, exists, url) {
    /**
     * The zoom level this tile belongs to.
     * @member {Number} level
     * @memberof OpenSeadragon.Tile#
     */
    this.level   = level;
    /**
     * The vector component 'x'.
     * @member {Number} x
     * @memberof OpenSeadragon.Tile#
     */
    this.x       = x;
    /**
     * The vector component 'y'.
     * @member {Number} y
     * @memberof OpenSeadragon.Tile#
     */
    this.y       = y;
    /**
     * Where this tile fits, in normalized coordinates
     * @member {OpenSeadragon.Point} bounds
     * @memberof OpenSeadragon.Tile#
     */
    this.bounds  = bounds;
    /**
     * Is this tile a part of a sparse image? Also has this tile failed to load?
     * @member {Boolean} exists
     * @memberof OpenSeadragon.Tile#
     */
    this.exists  = exists;
    /**
     * The URL of this tile's image.
     * @member {String} url
     * @memberof OpenSeadragon.Tile#
     */
    this.url     = url;
    /**
     * Is this tile loaded?
     * @member {Boolean} loaded
     * @memberof OpenSeadragon.Tile#
     */
    this.loaded  = false;
    /**
     * Is this tile loading?
     * @member {Boolean} loading
     * @memberof OpenSeadragon.Tile#
     */
    this.loading = false;

    /**
     * The HTML div element for this tile
     * @member {Element} element
     * @memberof OpenSeadragon.Tile#
     */
    this.element    = null;
    /**
     * The HTML img element for this tile.
     * @member {Element} imgElement
     * @memberof OpenSeadragon.Tile#
     */
    this.imgElement = null;
    /**
     * The Image object for this tile.
     * @member {Object} image
     * @memberof OpenSeadragon.Tile#
     */
    this.image      = null;

    /**
     * The alias of this.element.style.
     * @member {String} style
     * @memberof OpenSeadragon.Tile#
     */
    this.style      = null;
    /**
     * This tile's position on screen, in pixels.
     * @member {OpenSeadragon.Point} position
     * @memberof OpenSeadragon.Tile#
     */
    this.position   = null;
    /**
     * This tile's size on screen, in pixels.
     * @member {OpenSeadragon.Point} size
     * @memberof OpenSeadragon.Tile#
     */
    this.size       = null;
    /**
     * The start time of this tile's blending.
     * @member {Number} blendStart
     * @memberof OpenSeadragon.Tile#
     */
    this.blendStart = null;
    /**
     * The current opacity this tile should be.
     * @member {Number} opacity
     * @memberof OpenSeadragon.Tile#
     */
    this.opacity    = null;
    /**
     * The distance of this tile to the viewport center.
     * @member {Number} distance
     * @memberof OpenSeadragon.Tile#
     */
    this.distance   = null;
    /**
     * The visibility score of this tile.
     * @member {Number} visibility
     * @memberof OpenSeadragon.Tile#
     */
    this.visibility = null;

    /**
     * Whether this tile is currently being drawn.
     * @member {Boolean} beingDrawn
     * @memberof OpenSeadragon.Tile#
     */
    this.beingDrawn     = false;
    /**
     * Timestamp the tile was last touched.
     * @member {Number} lastTouchTime
     * @memberof OpenSeadragon.Tile#
     */
    this.lastTouchTime  = 0;
};

$.Tile.prototype = /** @lends OpenSeadragon.Tile.prototype */{

    /**
     * Provides a string representation of this tiles level and (x,y)
     * components.
     * @function
     * @returns {String}
     */
    toString: function() {
        return this.level + "/" + this.x + "_" + this.y;
    },

    /**
     * Renders the tile in an html container.
     * @function
     * @param {Element} container
     */
    drawHTML: function( container ) {
        if ( !this.loaded || !this.image ) {
            $.console.warn(
                "Attempting to draw tile %s when it's not yet loaded.",
                this.toString()
            );
            return;
        }

        //EXPERIMENTAL - trying to figure out how to scale the container
        //               content during animation of the container size.

        if ( !this.element ) {
            this.element                              = $.makeNeutralElement( "div" );
            this.imgElement                           = $.makeNeutralElement( "img" );
            this.imgElement.src                       = this.url;
            this.imgElement.style.msInterpolationMode = "nearest-neighbor";
            this.imgElement.style.width               = "100%";
            this.imgElement.style.height              = "100%";

            this.style                     = this.element.style;
            this.style.position            = "absolute";
        }
        if ( this.element.parentNode != container ) {
            container.appendChild( this.element );
        }
        if ( this.imgElement.parentNode != this.element ) {
            this.element.appendChild( this.imgElement );
        }

        this.style.top     = this.position.y + "px";
        this.style.left    = this.position.x + "px";
        this.style.height  = this.size.y + "px";
        this.style.width   = this.size.x + "px";

        $.setElementOpacity( this.element, this.opacity );
    },

    /**
     * Renders the tile in a canvas-based context.
     * @function
     * @param {Canvas} context
     * @param {Function} method for firing the drawing event. drawingHandler({context, tile, rendered})
     * where <code>rendered</code> is the context with the pre-drawn image.
     */
    drawCanvas: function( context, drawingHandler ) {

        var position = this.position,
            size     = this.size,
            rendered,
            canvas;

        if ( !this.loaded || !( this.image || TILE_CACHE[ this.url ] ) ){
            $.console.warn(
                "Attempting to draw tile %s when it's not yet loaded.",
                this.toString()
            );
            return;
        }
        context.globalAlpha = this.opacity;

        //context.save();

        //if we are supposed to be rendering fully opaque rectangle,
        //ie its done fading or fading is turned off, and if we are drawing
        //an image with an alpha channel, then the only way
        //to avoid seeing the tile underneath is to clear the rectangle
        if( context.globalAlpha == 1 && this.url.match('.png') ){
            //clearing only the inside of the rectangle occupied
            //by the png prevents edge flikering
            context.clearRect(
                position.x+1,
                position.y+1,
                size.x-2,
                size.y-2
            );

        }

        if( !TILE_CACHE[ this.url ] ){
            canvas = document.createElement( 'canvas' );
            canvas.width = this.image.width;
            canvas.height = this.image.height;
            rendered = canvas.getContext('2d');
            rendered.drawImage( this.image, 0, 0 );
            TILE_CACHE[ this.url ] = rendered;
            //since we are caching the prerendered image on a canvas
            //allow the image to not be held in memory
            this.image = null;
        }

        rendered = TILE_CACHE[ this.url ];

        // This gives the application a chance to make image manipulation changes as we are rendering the image
        drawingHandler({context: context, tile: this, rendered: rendered});

        //rendered.save();
        context.drawImage(
            rendered.canvas,
            0,
            0,
            rendered.canvas.width,
            rendered.canvas.height,
            position.x,
            position.y,
            size.x,
            size.y
        );
        //rendered.restore();

        //context.restore();
    },

    /**
     * Removes tile from its container.
     * @function
     */
    unload: function() {
        if ( this.imgElement && this.imgElement.parentNode ) {
            this.imgElement.parentNode.removeChild( this.imgElement );
        }
        if ( this.element && this.element.parentNode ) {
            this.element.parentNode.removeChild( this.element );
        }
        if ( TILE_CACHE[ this.url ]){
            delete TILE_CACHE[ this.url ];
        }

        this.element    = null;
        this.imgElement = null;
        this.image      = null;
        this.loaded     = false;
        this.loading    = false;
    }
};

}( OpenSeadragon ));

/*
 * OpenSeadragon - Overlay
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

    /**
     * An enumeration of positions that an overlay may be assigned relative to
     * the viewport.
     * @member OverlayPlacement
     * @memberof OpenSeadragon
     * @static
     * @type {Object}
     * @property {Number} CENTER
     * @property {Number} TOP_LEFT
     * @property {Number} TOP
     * @property {Number} TOP_RIGHT
     * @property {Number} RIGHT
     * @property {Number} BOTTOM_RIGHT
     * @property {Number} BOTTOM
     * @property {Number} BOTTOM_LEFT
     * @property {Number} LEFT
     */
    $.OverlayPlacement = {
        CENTER:       0,
        TOP_LEFT:     1,
        TOP:          2,
        TOP_RIGHT:    3,
        RIGHT:        4,
        BOTTOM_RIGHT: 5,
        BOTTOM:       6,
        BOTTOM_LEFT:  7,
        LEFT:         8
    };

    /**
     * @class Overlay
     * @classdesc Provides a way to float an HTML element on top of the viewer element.
     *
     * @memberof OpenSeadragon
     * @param {Object} options
     * @param {Element} options.element
     * @param {OpenSeadragon.Point|OpenSeadragon.Rect} options.location - The
     * location of the overlay on the image. If a {@link OpenSeadragon.Point}
     * is specified, the overlay will keep a constant size independently of the
     * zoom. If a {@link OpenSeadragon.Rect} is specified, the overlay size will
     * be adjusted when the zoom changes.
     * @param {OpenSeadragon.OverlayPlacement} [options.placement=OpenSeadragon.OverlayPlacement.TOP_LEFT]
     * Relative position to the viewport.
     * Only used if location is a {@link OpenSeadragon.Point}.
     * @param {OpenSeadragon.Overlay.OnDrawCallback} [options.onDraw]
     * @param {Boolean} [options.checkResize=true] Set to false to avoid to
     * check the size of the overlay everytime it is drawn when using a
     * {@link OpenSeadragon.Point} as options.location. It will improve
     * performances but will cause a misalignment if the overlay size changes.
     */
    $.Overlay = function( element, location, placement ) {

        /**
         * onDraw callback signature used by {@link OpenSeadragon.Overlay}.
         *
         * @callback OnDrawCallback
         * @memberof OpenSeadragon.Overlay
         * @param {OpenSeadragon.Point} position
         * @param {OpenSeadragon.Point} size
         * @param {Element} element
         */

        var options;
        if ( $.isPlainObject( element ) ) {
            options = element;
        } else {
            options = {
                element: element,
                location: location,
                placement: placement
            };
        }
        
        this.element    = options.element;
        this.scales     = options.location instanceof $.Rect;
        this.bounds     = new $.Rect(
            options.location.x,
            options.location.y,
            options.location.width,
            options.location.height
        );
        this.position   = new $.Point(
            options.location.x,
            options.location.y
        );
        this.size       = new $.Point(
            options.location.width,
            options.location.height
        );
        this.style      = options.element.style;
        // rects are always top-left
        this.placement  = options.location instanceof $.Point ?
            options.placement :
            $.OverlayPlacement.TOP_LEFT;
        this.onDraw = options.onDraw;
        this.checkResize = options.checkResize === undefined ?
            true : options.checkResize;
    };

    $.Overlay.prototype = /** @lends OpenSeadragon.Overlay.prototype */{

        /**
         * @function
         * @param {OpenSeadragon.OverlayPlacement} position
         * @param {OpenSeadragon.Point} size
         */
        adjust: function( position, size ) {
            switch ( this.placement ) {
                case $.OverlayPlacement.TOP_LEFT:
                    break;
                case $.OverlayPlacement.TOP:
                    position.x -= size.x / 2;
                    break;
                case $.OverlayPlacement.TOP_RIGHT:
                    position.x -= size.x;
                    break;
                case $.OverlayPlacement.RIGHT:
                    position.x -= size.x;
                    position.y -= size.y / 2;
                    break;
                case $.OverlayPlacement.BOTTOM_RIGHT:
                    position.x -= size.x;
                    position.y -= size.y;
                    break;
                case $.OverlayPlacement.BOTTOM:
                    position.x -= size.x / 2;
                    position.y -= size.y;
                    break;
                case $.OverlayPlacement.BOTTOM_LEFT:
                    position.y -= size.y;
                    break;
                case $.OverlayPlacement.LEFT:
                    position.y -= size.y / 2;
                    break;
                default:
                case $.OverlayPlacement.CENTER:
                    position.x -= size.x / 2;
                    position.y -= size.y / 2;
                    break;
            }
        },

        /**
         * @function
         */
        destroy: function() {
            var element = this.element,
                style   = this.style;

            if ( element.parentNode ) {
                element.parentNode.removeChild( element );
                //this should allow us to preserve overlays when required between
                //pages
                if ( element.prevElementParent ) {
                    style.display = 'none';
                    //element.prevElementParent.insertBefore(
                    //    element,
                    //    element.prevNextSibling
                    //);
                    document.body.appendChild( element );
                }
            }

            // clear the onDraw callback
            this.onDraw = null;

            style.top = "";
            style.left = "";
            style.position = "";

            if ( this.scales ) {
                style.width = "";
                style.height = "";
            }
        },

        /**
         * @function
         * @param {Element} container
         */
        drawHTML: function( container, viewport ) {
            var element = this.element,
                style   = this.style,
                scales  = this.scales,
                degrees  = viewport.degrees,
                position = viewport.pixelFromPoint(
                    this.bounds.getTopLeft(),
                    true
                ),
                size,
                overlayCenter;

            if ( element.parentNode != container ) {
                //save the source parent for later if we need it
                element.prevElementParent  = element.parentNode;
                element.prevNextSibling    = element.nextSibling;
                container.appendChild( element );
                this.size = $.getElementSize( element );
            }

            if ( scales ) {
                size = viewport.deltaPixelsFromPoints(
                    this.bounds.getSize(),
                    true
                );
            } else if ( this.checkResize ) {
                size = $.getElementSize( element );
            } else {
                size = this.size;
            }

            this.position = position;
            this.size     = size;

            this.adjust( position, size );

            position = position.apply( Math.floor );
            size     = size.apply( Math.ceil );

            // rotate the position of the overlay
            // TODO only rotate overlays if in canvas mode
            // TODO replace the size rotation with CSS3 transforms
            // TODO add an option to overlays to not rotate with the image
            // Currently only rotates position and size
            if( degrees !== 0 && this.scales ) {
                overlayCenter = new $.Point( size.x / 2, size.y / 2 );

                var drawerCenter = new $.Point(
                    viewport.viewer.drawer.canvas.width / 2,
                    viewport.viewer.drawer.canvas.height / 2
                );
                position = position.plus( overlayCenter ).rotate(
                    degrees,
                    drawerCenter
                ).minus( overlayCenter );

                size = size.rotate( degrees, new $.Point( 0, 0 ) );
                size = new $.Point( Math.abs( size.x ), Math.abs( size.y ) );
            }

            // call the onDraw callback if it exists to allow one to overwrite
            // the drawing/positioning/sizing of the overlay
            if ( this.onDraw ) {
                this.onDraw( position, size, element );
            } else {
                style.left     = position.x + "px";
                style.top      = position.y + "px";
                style.position = "absolute";
                style.display  = 'block';

                if ( scales ) {
                    style.width  = size.x + "px";
                    style.height = size.y + "px";
                }
            }
        },

        /**
         * @function
         * @param {OpenSeadragon.Point|OpenSeadragon.Rect} location
         * @param {OpenSeadragon.OverlayPlacement} position
         */
        update: function( location, placement ) {
            this.scales     = location instanceof $.Rect;
            this.bounds     = new $.Rect(
                location.x,
                location.y,
                location.width,
                location.height
            );
            // rects are always top-left
            this.placement  = location instanceof $.Point ?
                placement :
                $.OverlayPlacement.TOP_LEFT;
        }

    };

}( OpenSeadragon ));

/*
 * OpenSeadragon - Drawer
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){

var DEVICE_SCREEN       = $.getWindowSize(),
    BROWSER             = $.Browser.vendor,
    BROWSER_VERSION     = $.Browser.version,

    SUBPIXEL_RENDERING = (
        ( BROWSER == $.BROWSERS.FIREFOX ) ||
        ( BROWSER == $.BROWSERS.OPERA )   ||
        ( BROWSER == $.BROWSERS.SAFARI && BROWSER_VERSION >= 4 ) ||
        ( BROWSER == $.BROWSERS.CHROME && BROWSER_VERSION >= 2 ) ||
        ( BROWSER == $.BROWSERS.IE     && BROWSER_VERSION >= 9 )
    );


/**
 * @class Drawer
 * @classdesc Handles rendering of tiles for an {@link OpenSeadragon.Viewer}.
 * A new instance is created for each TileSource opened (see {@link OpenSeadragon.Viewer#drawer}).
 *
 * @memberof OpenSeadragon
 * @param {OpenSeadragon.TileSource} source - Reference to Viewer tile source.
 * @param {OpenSeadragon.Viewport} viewport - Reference to Viewer viewport.
 * @param {Element} element - Parent element.
 */
$.Drawer = function( options ) {

    //backward compatibility for positional args while prefering more
    //idiomatic javascript options object as the only argument
    var args  = arguments,
        i;

    if( !$.isPlainObject( options ) ){
        options = {
            source:     args[ 0 ], // Reference to Viewer tile source.
            viewport:   args[ 1 ], // Reference to Viewer viewport.
            element:    args[ 2 ]  // Parent element.
        };
    }

    $.extend( true, this, {

        //internal state properties
        viewer:         null,
        downloading:    0,     // How many images are currently being loaded in parallel.
        tilesMatrix:    {},    // A '3d' dictionary [level][x][y] --> Tile.
        tilesLoaded:    [],    // An unordered list of Tiles with loaded images.
        coverage:       {},    // A '3d' dictionary [level][x][y] --> Boolean.
        lastDrawn:      [],    // An unordered list of Tiles drawn last frame.
        lastResetTime:  0,     // Last time for which the drawer was reset.
        midUpdate:      false, // Is the drawer currently updating the viewport?
        updateAgain:    true,  // Does the drawer need to update the viewort again?


        //internal state / configurable settings
        collectionOverlays: {}, // For collection mode. Here an overlay is actually a viewer.

        //configurable settings
        opacity:            $.DEFAULT_SETTINGS.opacity,
        maxImageCacheCount: $.DEFAULT_SETTINGS.maxImageCacheCount,
        imageLoaderLimit:   $.DEFAULT_SETTINGS.imageLoaderLimit,
        minZoomImageRatio:  $.DEFAULT_SETTINGS.minZoomImageRatio,
        wrapHorizontal:     $.DEFAULT_SETTINGS.wrapHorizontal,
        wrapVertical:       $.DEFAULT_SETTINGS.wrapVertical,
        immediateRender:    $.DEFAULT_SETTINGS.immediateRender,
        blendTime:          $.DEFAULT_SETTINGS.blendTime,
        alwaysBlend:        $.DEFAULT_SETTINGS.alwaysBlend,
        minPixelRatio:      $.DEFAULT_SETTINGS.minPixelRatio,
        debugMode:          $.DEFAULT_SETTINGS.debugMode,
        timeout:            $.DEFAULT_SETTINGS.timeout,
        crossOriginPolicy:  $.DEFAULT_SETTINGS.crossOriginPolicy

    }, options );

    this.useCanvas  = $.supportsCanvas && ( this.viewer ? this.viewer.useCanvas : true );
    /**
     * The parent element of this Drawer instance, passed in when the Drawer was created.
     * The parent of {@link OpenSeadragon.Drawer#canvas}.
     * @member {Element} container
     * @memberof OpenSeadragon.Drawer#
     */
    this.container  = $.getElement( this.element );
    /**
     * A &lt;canvas&gt; element if the browser supports them, otherwise a &lt;div&gt; element.
     * Child element of {@link OpenSeadragon.Drawer#container}.
     * @member {Element} canvas
     * @memberof OpenSeadragon.Drawer#
     */
    this.canvas     = $.makeNeutralElement( this.useCanvas ? "canvas" : "div" );
    /**
     * 2d drawing context for {@link OpenSeadragon.Drawer#canvas} if it's a &lt;canvas&gt; element, otherwise null.
     * @member {Object} context
     * @memberof OpenSeadragon.Drawer#
     */
    this.context    = this.useCanvas ? this.canvas.getContext( "2d" ) : null;
    // Ratio of zoomable image height to width.
    this.normHeight = this.source.dimensions.y / this.source.dimensions.x;
    /**
     * @member {Element} element
     * @memberof OpenSeadragon.Drawer#
     * @deprecated Alias for {@link OpenSeadragon.Drawer#container}.
     */
    this.element    = this.container;

    // We force our container to ltr because our drawing math doesn't work in rtl.
    // This issue only affects our canvas renderer, but we do it always for consistency.
    // Note that this means overlays you want to be rtl need to be explicitly set to rtl.
    this.container.dir = 'ltr';

    this.canvas.style.width     = "100%";
    this.canvas.style.height    = "100%";
    this.canvas.style.position  = "absolute";
    $.setElementOpacity( this.canvas, this.opacity, true );

    // explicit left-align
    this.container.style.textAlign = "left";
    this.container.appendChild( this.canvas );

    //this.profiler    = new $.Profiler();
};

$.Drawer.prototype = /** @lends OpenSeadragon.Drawer.prototype */{

    /**
     * Adds an html element as an overlay to the current viewport.  Useful for
     * highlighting words or areas of interest on an image or other zoomable
     * interface.
     * @method
     * @param {Element|String|Object} element - A reference to an element or an id for
     *      the element which will overlayed. Or an Object specifying the configuration for the overlay
     * @param {OpenSeadragon.Point|OpenSeadragon.Rect} location - The point or
     *      rectangle which will be overlayed.
     * @param {OpenSeadragon.OverlayPlacement} placement - The position of the
     *      viewport which the location coordinates will be treated as relative
     *      to.
     * @param {function} onDraw - If supplied the callback is called when the overlay
     *      needs to be drawn. It it the responsibility of the callback to do any drawing/positioning.
     *      It is passed position, size and element.
     * @fires OpenSeadragon.Viewer.event:add-overlay
     * @deprecated - use {@link OpenSeadragon.Viewer#addOverlay} instead.
     */
    addOverlay: function( element, location, placement, onDraw ) {
        $.console.error("drawer.addOverlay is deprecated. Use viewer.addOverlay instead.");
        this.viewer.addOverlay( element, location, placement, onDraw );
        return this;
    },

    /**
     * Updates the overlay represented by the reference to the element or
     * element id moving it to the new location, relative to the new placement.
     * @method
     * @param {OpenSeadragon.Point|OpenSeadragon.Rect} location - The point or
     *      rectangle which will be overlayed.
     * @param {OpenSeadragon.OverlayPlacement} placement - The position of the
     *      viewport which the location coordinates will be treated as relative
     *      to.
     * @return {OpenSeadragon.Drawer} Chainable.
     * @fires OpenSeadragon.Viewer.event:update-overlay
     * @deprecated - use {@link OpenSeadragon.Viewer#updateOverlay} instead.
     */
    updateOverlay: function( element, location, placement ) {
        $.console.error("drawer.updateOverlay is deprecated. Use viewer.updateOverlay instead.");
        this.viewer.updateOverlay( element, location, placement );
        return this;
    },

    /**
     * Removes and overlay identified by the reference element or element id
     *      and schedules and update.
     * @method
     * @param {Element|String} element - A reference to the element or an
     *      element id which represent the ovelay content to be removed.
     * @return {OpenSeadragon.Drawer} Chainable.
     * @fires OpenSeadragon.Viewer.event:remove-overlay
     * @deprecated - use {@link OpenSeadragon.Viewer#removeOverlay} instead.
     */
    removeOverlay: function( element ) {
        $.console.error("drawer.removeOverlay is deprecated. Use viewer.removeOverlay instead.");
        this.viewer.removeOverlay( element );
        return this;
    },

    /**
     * Removes all currently configured Overlays from this Drawer and schedules
     *      and update.
     * @method
     * @return {OpenSeadragon.Drawer} Chainable.
     * @fires OpenSeadragon.Viewer.event:clear-overlay
     * @deprecated - use {@link OpenSeadragon.Viewer#clearOverlays} instead.
     */
    clearOverlays: function() {
        $.console.error("drawer.clearOverlays is deprecated. Use viewer.clearOverlays instead.");
        this.viewer.clearOverlays();
        return this;
    },

    /**
     * Set the opacity of the drawer.
     * @method
     * @param {Number} opacity
     * @return {OpenSeadragon.Drawer} Chainable.
     */
    setOpacity: function( opacity ) {
        this.opacity = opacity;
        $.setElementOpacity( this.canvas, this.opacity, true );
        return this;
    },

    /**
     * Get the opacity of the drawer.
     * @method
     * @returns {Number}
     */
    getOpacity: function() {
        return this.opacity;
    },
    /**
     * Returns whether the Drawer is scheduled for an update at the
     *      soonest possible opportunity.
     * @method
     * @returns {Boolean} - Whether the Drawer is scheduled for an update at the
     *      soonest possible opportunity.
     */
    needsUpdate: function() {
        return this.updateAgain;
    },

    /**
     * Returns the total number of tiles that have been loaded by this Drawer.
     * @method
     * @returns {Number} - The total number of tiles that have been loaded by
     *      this Drawer.
     */
    numTilesLoaded: function() {
        return this.tilesLoaded.length;
    },

    /**
     * Clears all tiles and triggers an update on the next call to
     * Drawer.prototype.update().
     * @method
     * @return {OpenSeadragon.Drawer} Chainable.
     */
    reset: function() {
        clearTiles( this );
        this.lastResetTime = $.now();
        this.updateAgain = true;
        return this;
    },

    /**
     * Forces the Drawer to update.
     * @method
     * @return {OpenSeadragon.Drawer} Chainable.
     */
    update: function() {
        //this.profiler.beginUpdate();
        this.midUpdate = true;
        updateViewport( this );
        this.midUpdate = false;
        //this.profiler.endUpdate();
        return this;
    },

    /**
     * Used internally to load images when required.  May also be used to
     * preload a set of images so the browser will have them available in
     * the local cache to optimize user experience in certain cases. Because
     * the number of parallel image loads is configurable, if too many images
     * are currently being loaded, the request will be ignored.  Since by
     * default drawer.imageLoaderLimit is 0, the native browser parallel
     * image loading policy will be used.
     * @method
     * @param {String} src - The url of the image to load.
     * @param {Function} callback - The function that will be called with the
     *      Image object as the only parameter if it was loaded successfully.
     *      If an error occured, or the request timed out or was aborted,
     *      the parameter is null instead.
     * @return {Boolean} loading - Whether the request was submitted or ignored
     *      based on OpenSeadragon.DEFAULT_SETTINGS.imageLoaderLimit.
     */
    loadImage: function( src, callback ) {
        var _this = this,
            loading = false,
            image,
            jobid,
            complete;

        if ( !this.imageLoaderLimit ||
              this.downloading < this.imageLoaderLimit ) {

            this.downloading++;

            image = new Image();

            if ( _this.crossOriginPolicy !== false ) {
                image.crossOrigin = _this.crossOriginPolicy;
            }

            complete = function( imagesrc, resultingImage ){
                _this.downloading--;
                if (typeof ( callback ) == "function") {
                    try {
                        callback( resultingImage );
                    } catch ( e ) {
                        $.console.error(
                            "%s while executing %s callback: %s",
                            e.name,
                            src,
                            e.message,
                            e
                        );
                    }
                }
            };

            image.onload = function(){
                finishLoadingImage( image, complete, true, jobid );
            };

            image.onabort = image.onerror = function(){
                finishLoadingImage( image, complete, false, jobid );
            };

            jobid = window.setTimeout( function(){
                finishLoadingImage( image, complete, false, jobid );
            }, this.timeout );

            loading   = true;
            image.src = src;
        }

        return loading;
    },

    /**
     * Returns whether rotation is supported or not.
     * @method
     * @return {Boolean} True if rotation is supported.
     */
    canRotate: function() {
        return this.useCanvas;
    }
};

/**
 * @private
 * @inner
 * Pretty much every other line in this needs to be documented so it's clear
 * how each piece of this routine contributes to the drawing process.  That's
 * why there are so many TODO's inside this function.
 */
function updateViewport( drawer ) {

    drawer.updateAgain = false;

    if( drawer.viewer ){
        /**
         * <em>- Needs documentation -</em>
         *
         * @event update-viewport
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        drawer.viewer.raiseEvent( 'update-viewport', {} );
    }

    var tile,
        level,
        best            = null,
        haveDrawn       = false,
        currentTime     = $.now(),
        viewportSize    = drawer.viewport.getContainerSize(),
        viewportBounds  = drawer.viewport.getBounds( true ),
        viewportTL      = viewportBounds.getTopLeft(),
        viewportBR      = viewportBounds.getBottomRight(),
        zeroRatioC      = drawer.viewport.deltaPixelsFromPoints(
            drawer.source.getPixelRatio( 0 ),
            true
        ).x,
        lowestLevel     = Math.max(
            drawer.source.minLevel,
            Math.floor(
                Math.log( drawer.minZoomImageRatio ) /
                Math.log( 2 )
            )
        ),
        highestLevel    = Math.min(
            Math.abs(drawer.source.maxLevel),
            Math.abs(Math.floor(
                Math.log( zeroRatioC / drawer.minPixelRatio ) /
                Math.log( 2 )
            ))
        ),
        degrees         = drawer.viewport.degrees,
        renderPixelRatioC,
        renderPixelRatioT,
        zeroRatioT,
        optimalRatio,
        levelOpacity,
        levelVisibility;

    //TODO
    while ( drawer.lastDrawn.length > 0 ) {
        tile = drawer.lastDrawn.pop();
        tile.beingDrawn = false;
    }

    //TODO
    drawer.canvas.innerHTML   = "";
    if ( drawer.useCanvas ) {
        if( drawer.canvas.width  != viewportSize.x ||
            drawer.canvas.height != viewportSize.y ){
            drawer.canvas.width  = viewportSize.x;
            drawer.canvas.height = viewportSize.y;
        }
        drawer.context.clearRect( 0, 0, viewportSize.x, viewportSize.y );
    }

    //Change bounds for rotation
    if (degrees === 90 || degrees === 270) {
        var rotatedBounds = viewportBounds.rotate( degrees );
        viewportTL = rotatedBounds.getTopLeft();
        viewportBR = rotatedBounds.getBottomRight();
    }

    //Don't draw if completely outside of the viewport
    if  ( !drawer.wrapHorizontal &&
        ( viewportBR.x < 0 || viewportTL.x > 1 ) ) {
        return;
    } else if
        ( !drawer.wrapVertical &&
        ( viewportBR.y < 0 || viewportTL.y > drawer.normHeight ) ) {
        return;
    }

    //TODO
    if ( !drawer.wrapHorizontal ) {
        viewportTL.x = Math.max( viewportTL.x, 0 );
        viewportBR.x = Math.min( viewportBR.x, 1 );
    }
    if ( !drawer.wrapVertical ) {
        viewportTL.y = Math.max( viewportTL.y, 0 );
        viewportBR.y = Math.min( viewportBR.y, drawer.normHeight );
    }

    //TODO
    lowestLevel = Math.min( lowestLevel, highestLevel );

    //TODO
    var drawLevel; // FIXME: drawLevel should have a more explanatory name
    for ( level = highestLevel; level >= lowestLevel; level-- ) {
        drawLevel = false;

        //Avoid calculations for draw if we have already drawn this
        renderPixelRatioC = drawer.viewport.deltaPixelsFromPoints(
            drawer.source.getPixelRatio( level ),
            true
        ).x;

        if ( ( !haveDrawn && renderPixelRatioC >= drawer.minPixelRatio ) ||
             ( level == lowestLevel ) ) {
            drawLevel = true;
            haveDrawn = true;
        } else if ( !haveDrawn ) {
            continue;
        }

        //Perform calculations for draw if we haven't drawn this
        renderPixelRatioT = drawer.viewport.deltaPixelsFromPoints(
            drawer.source.getPixelRatio( level ),
            false
        ).x;

        zeroRatioT      = drawer.viewport.deltaPixelsFromPoints(
            drawer.source.getPixelRatio(
                Math.max(
                    drawer.source.getClosestLevel( drawer.viewport.containerSize ) - 1,
                    0
                )
            ),
            false
        ).x;

        optimalRatio    = drawer.immediateRender ?
            1 :
            zeroRatioT;

        levelOpacity    = Math.min( 1, ( renderPixelRatioC - 0.5 ) / 0.5 );

        levelVisibility = optimalRatio / Math.abs(
            optimalRatio - renderPixelRatioT
        );

        //TODO
        best = updateLevel(
            drawer,
            haveDrawn,
            drawLevel,
            level,
            levelOpacity,
            levelVisibility,
            viewportTL,
            viewportBR,
            currentTime,
            best
        );

        //TODO
        if (  providesCoverage( drawer.coverage, level ) ) {
            break;
        }
    }

    //TODO
    drawTiles( drawer, drawer.lastDrawn );

    //TODO
    if ( best ) {
        loadTile( drawer, best, currentTime );
        // because we haven't finished drawing, so
        drawer.updateAgain = true;
    }

}


function updateLevel( drawer, haveDrawn, drawLevel, level, levelOpacity, levelVisibility, viewportTL, viewportBR, currentTime, best ){

    var x, y,
        tileTL,
        tileBR,
        numberOfTiles,
        viewportCenter  = drawer.viewport.pixelFromPoint( drawer.viewport.getCenter() );


    if( drawer.viewer ){
        /**
         * <em>- Needs documentation -</em>
         *
         * @event update-level
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
         * @property {Object} havedrawn
         * @property {Object} level
         * @property {Object} opacity
         * @property {Object} visibility
         * @property {Object} topleft
         * @property {Object} bottomright
         * @property {Object} currenttime
         * @property {Object} best
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        drawer.viewer.raiseEvent( 'update-level', {
            havedrawn: haveDrawn,
            level: level,
            opacity: levelOpacity,
            visibility: levelVisibility,
            topleft: viewportTL,
            bottomright: viewportBR,
            currenttime: currentTime,
            best: best
        });
    }

    //OK, a new drawing so do your calculations
    tileTL    = drawer.source.getTileAtPoint( level, viewportTL );
    tileBR    = drawer.source.getTileAtPoint( level, viewportBR );
    numberOfTiles  = drawer.source.getNumTiles( level );

    resetCoverage( drawer.coverage, level );

    if ( !drawer.wrapHorizontal ) {
        tileBR.x = Math.min( tileBR.x, numberOfTiles.x - 1 );
    }
    if ( !drawer.wrapVertical ) {
        tileBR.y = Math.min( tileBR.y, numberOfTiles.y - 1 );
    }

    for ( x = tileTL.x; x <= tileBR.x; x++ ) {
        for ( y = tileTL.y; y <= tileBR.y; y++ ) {

            best = updateTile(
                drawer,
                drawLevel,
                haveDrawn,
                x, y,
                level,
                levelOpacity,
                levelVisibility,
                viewportCenter,
                numberOfTiles,
                currentTime,
                best
            );

        }
    }

    return best;
}

function updateTile( drawer, drawLevel, haveDrawn, x, y, level, levelOpacity, levelVisibility, viewportCenter, numberOfTiles, currentTime, best){

    var tile = getTile(
            x, y,
            level,
            drawer.source,
            drawer.tilesMatrix,
            currentTime,
            numberOfTiles,
            drawer.normHeight
        ),
        drawTile = drawLevel;

    if( drawer.viewer ){
        /**
         * <em>- Needs documentation -</em>
         *
         * @event update-tile
         * @memberof OpenSeadragon.Viewer
         * @type {object}
         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
         * @property {OpenSeadragon.Tile} tile
         * @property {?Object} userData - Arbitrary subscriber-defined object.
         */
        drawer.viewer.raiseEvent( 'update-tile', {
            tile: tile
        });
    }

    setCoverage( drawer.coverage, level, x, y, false );

    if ( !tile.exists ) {
        return best;
    }

    if ( haveDrawn && !drawTile ) {
        if ( isCovered( drawer.coverage, level, x, y ) ) {
            setCoverage( drawer.coverage, level, x, y, true );
        } else {
            drawTile = true;
        }
    }

    if ( !drawTile ) {
        return best;
    }

    positionTile(
        tile,
        drawer.source.tileOverlap,
        drawer.viewport,
        viewportCenter,
        levelVisibility
    );

    if ( tile.loaded ) {
        var needsUpdate = blendTile(
            drawer,
            tile,
            x, y,
            level,
            levelOpacity,
            currentTime
        );

        if ( needsUpdate ) {
            drawer.updateAgain = true;
        }
    } else if ( tile.loading ) {
        // the tile is already in the download queue
        // thanks josh1093 for finally translating this typo
    } else {
        best = compareTiles( best, tile );
    }

    return best;
}

function getTile( x, y, level, tileSource, tilesMatrix, time, numTiles, normHeight ) {
    var xMod,
        yMod,
        bounds,
        exists,
        url,
        tile;

    if ( !tilesMatrix[ level ] ) {
        tilesMatrix[ level ] = {};
    }
    if ( !tilesMatrix[ level ][ x ] ) {
        tilesMatrix[ level ][ x ] = {};
    }

    if ( !tilesMatrix[ level ][ x ][ y ] ) {
        xMod    = ( numTiles.x + ( x % numTiles.x ) ) % numTiles.x;
        yMod    = ( numTiles.y + ( y % numTiles.y ) ) % numTiles.y;
        bounds  = tileSource.getTileBounds( level, xMod, yMod );
        exists  = tileSource.tileExists( level, xMod, yMod );
        url     = tileSource.getTileUrl( level, xMod, yMod );

        bounds.x += 1.0 * ( x - xMod ) / numTiles.x;
        bounds.y += normHeight * ( y - yMod ) / numTiles.y;

        tilesMatrix[ level ][ x ][ y ] = new $.Tile(
            level,
            x,
            y,
            bounds,
            exists,
            url
        );
    }

    tile = tilesMatrix[ level ][ x ][ y ];
    tile.lastTouchTime = time;

    return tile;
}


function loadTile( drawer, tile, time ) {
    if( drawer.viewport.collectionMode ){
        drawer.midUpdate = false;
        onTileLoad( drawer, tile, time );
    } else {
        tile.loading = drawer.loadImage(
            tile.url,
            function( image ){
                onTileLoad( drawer, tile, time, image );
            }
        );
    }
}

function onTileLoad( drawer, tile, time, image ) {
    var insertionIndex,
        cutoff,
        worstTile,
        worstTime,
        worstLevel,
        worstTileIndex,
        prevTile,
        prevTime,
        prevLevel,
        i;

    tile.loading = false;

    if ( drawer.midUpdate ) {
        $.console.warn( "Tile load callback in middle of drawing routine." );
        return;
    } else if ( !image  && !drawer.viewport.collectionMode ) {
        $.console.log( "Tile %s failed to load: %s", tile, tile.url );
        if( !drawer.debugMode ){
            tile.exists = false;
            return;
        }
    } else if ( time < drawer.lastResetTime ) {
        $.console.log( "Ignoring tile %s loaded before reset: %s", tile, tile.url );
        return;
    }

    tile.loaded = true;
    tile.image  = image;


    insertionIndex = drawer.tilesLoaded.length;

    if ( drawer.tilesLoaded.length >= drawer.maxImageCacheCount ) {
        cutoff = Math.ceil( Math.log( drawer.source.tileSize ) / Math.log( 2 ) );

        worstTile       = null;
        worstTileIndex  = -1;

        for ( i = drawer.tilesLoaded.length - 1; i >= 0; i-- ) {
            prevTile = drawer.tilesLoaded[ i ];

            if ( prevTile.level <= drawer.cutoff || prevTile.beingDrawn ) {
                continue;
            } else if ( !worstTile ) {
                worstTile       = prevTile;
                worstTileIndex  = i;
                continue;
            }

            prevTime    = prevTile.lastTouchTime;
            worstTime   = worstTile.lastTouchTime;
            prevLevel   = prevTile.level;
            worstLevel  = worstTile.level;

            if ( prevTime < worstTime ||
               ( prevTime == worstTime && prevLevel > worstLevel ) ) {
                worstTile       = prevTile;
                worstTileIndex  = i;
            }
        }

        if ( worstTile && worstTileIndex >= 0 ) {
            worstTile.unload();
            insertionIndex = worstTileIndex;
        }
    }

    drawer.tilesLoaded[ insertionIndex ] = tile;
    drawer.updateAgain = true;
}


function positionTile( tile, overlap, viewport, viewportCenter, levelVisibility ){
    var boundsTL     = tile.bounds.getTopLeft(),
        boundsSize   = tile.bounds.getSize(),
        positionC    = viewport.pixelFromPoint( boundsTL, true ),
        positionT    = viewport.pixelFromPoint( boundsTL, false ),
        sizeC        = viewport.deltaPixelsFromPoints( boundsSize, true ),
        sizeT        = viewport.deltaPixelsFromPoints( boundsSize, false ),
        tileCenter   = positionT.plus( sizeT.divide( 2 ) ),
        tileDistance = viewportCenter.distanceTo( tileCenter );

    if ( !overlap ) {
        sizeC = sizeC.plus( new $.Point( 1, 1 ) );
    }

    tile.position   = positionC;
    tile.size       = sizeC;
    tile.distance   = tileDistance;
    tile.visibility = levelVisibility;
}


function blendTile( drawer, tile, x, y, level, levelOpacity, currentTime ){
    var blendTimeMillis = 1000 * drawer.blendTime,
        deltaTime,
        opacity;

    if ( !tile.blendStart ) {
        tile.blendStart = currentTime;
    }

    deltaTime   = currentTime - tile.blendStart;
    opacity     = blendTimeMillis ? Math.min( 1, deltaTime / ( blendTimeMillis ) ) : 1;

    if ( drawer.alwaysBlend ) {
        opacity *= levelOpacity;
    }

    tile.opacity = opacity;

    drawer.lastDrawn.push( tile );

    if ( opacity == 1 ) {
        setCoverage( drawer.coverage, level, x, y, true );
    } else if ( deltaTime < blendTimeMillis ) {
        return true;
    }

    return false;
}


function clearTiles( drawer ) {
    drawer.tilesMatrix = {};
    drawer.tilesLoaded = [];
}

/**
 * @private
 * @inner
 * Returns true if the given tile provides coverage to lower-level tiles of
 * lower resolution representing the same content. If neither x nor y is
 * given, returns true if the entire visible level provides coverage.
 *
 * Note that out-of-bounds tiles provide coverage in this sense, since
 * there's no content that they would need to cover. Tiles at non-existent
 * levels that are within the image bounds, however, do not.
 */
function providesCoverage( coverage, level, x, y ) {
    var rows,
        cols,
        i, j;

    if ( !coverage[ level ] ) {
        return false;
    }

    if ( x === undefined || y === undefined ) {
        rows = coverage[ level ];
        for ( i in rows ) {
            if ( rows.hasOwnProperty( i ) ) {
                cols = rows[ i ];
                for ( j in cols ) {
                    if ( cols.hasOwnProperty( j ) && !cols[ j ] ) {
                        return false;
                    }
                }
            }
        }

        return true;
    }

    return (
        coverage[ level ][ x] === undefined ||
        coverage[ level ][ x ][ y ] === undefined ||
        coverage[ level ][ x ][ y ] === true
    );
}

/**
 * @private
 * @inner
 * Returns true if the given tile is completely covered by higher-level
 * tiles of higher resolution representing the same content. If neither x
 * nor y is given, returns true if the entire visible level is covered.
 */
function isCovered( coverage, level, x, y ) {
    if ( x === undefined || y === undefined ) {
        return providesCoverage( coverage, level + 1 );
    } else {
        return (
             providesCoverage( coverage, level + 1, 2 * x, 2 * y ) &&
             providesCoverage( coverage, level + 1, 2 * x, 2 * y + 1 ) &&
             providesCoverage( coverage, level + 1, 2 * x + 1, 2 * y ) &&
             providesCoverage( coverage, level + 1, 2 * x + 1, 2 * y + 1 )
        );
    }
}

/**
 * @private
 * @inner
 * Sets whether the given tile provides coverage or not.
 */
function setCoverage( coverage, level, x, y, covers ) {
    if ( !coverage[ level ] ) {
        $.console.warn(
            "Setting coverage for a tile before its level's coverage has been reset: %s",
            level
        );
        return;
    }

    if ( !coverage[ level ][ x ] ) {
        coverage[ level ][ x ] = {};
    }

    coverage[ level ][ x ][ y ] = covers;
}

/**
 * @private
 * @inner
 * Resets coverage information for the given level. This should be called
 * after every draw routine. Note that at the beginning of the next draw
 * routine, coverage for every visible tile should be explicitly set.
 */
function resetCoverage( coverage, level ) {
    coverage[ level ] = {};
}

/**
 * @private
 * @inner
 * Determines whether the 'last best' tile for the area is better than the
 * tile in question.
 */
function compareTiles( previousBest, tile ) {
    if ( !previousBest ) {
        return tile;
    }

    if ( tile.visibility > previousBest.visibility ) {
        return tile;
    } else if ( tile.visibility == previousBest.visibility ) {
        if ( tile.distance < previousBest.distance ) {
            return tile;
        }
    }

    return previousBest;
}

function finishLoadingImage( image, callback, successful, jobid ){

    image.onload = null;
    image.onabort = null;
    image.onerror = null;

    if ( jobid ) {
        window.clearTimeout( jobid );
    }
    $.requestAnimationFrame( function() {
        callback( image.src, successful ? image : null);
    });

}

function drawTiles( drawer, lastDrawn ){
    var i,
        tile,
        tileKey,
        viewer,
        viewport,
        position,
        tileSource,
        collectionTileSource;

    // We need a callback to give image manipulation a chance to happen
    var drawingHandler = function(args) {
        if (drawer.viewer) {
          /**
           * This event is fired just before the tile is drawn giving the application a chance to alter the image.
           *
           * NOTE: This event is only fired when the drawer is using a <canvas>.
           *
           * @event tile-drawing
           * @memberof OpenSeadragon.Viewer
           * @type {object}
           * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
           * @property {OpenSeadragon.Tile} tile
           * @property {?Object} userData - 'context', 'tile' and 'rendered'.
           */
            drawer.viewer.raiseEvent('tile-drawing', args);
        }
    };

    for ( i = lastDrawn.length - 1; i >= 0; i-- ) {
        tile = lastDrawn[ i ];

        //We dont actually 'draw' a collection tile, rather its used to house
        //an overlay which does the drawing in its own viewport
        if( drawer.viewport.collectionMode ){

            tileKey = tile.x + '/' + tile.y;
            viewport = drawer.viewport;
            collectionTileSource = viewport.collectionTileSource;

            if( !drawer.collectionOverlays[ tileKey ] ){

                position = collectionTileSource.layout == 'horizontal' ?
                    tile.y + ( tile.x * collectionTileSource.rows ) :
                    tile.x + ( tile.y * collectionTileSource.rows );

                if (position < collectionTileSource.tileSources.length) {
                    tileSource = collectionTileSource.tileSources[ position ];
                } else {
                    tileSource = null;
                }

                //$.console.log("Rendering collection tile %s | %s | %s", tile.y, tile.y, position);
                if( tileSource ){
                    drawer.collectionOverlays[ tileKey ] = viewer = new $.Viewer({
                        hash:                   viewport.viewer.hash + "-" + tileKey,
                        element:                $.makeNeutralElement( "div" ),
                        mouseNavEnabled:        false,
                        showNavigator:          false,
                        showSequenceControl:    false,
                        showNavigationControl:  false,
                        tileSources: [
                            tileSource
                        ]
                    });

                    //TODO: IE seems to barf on this, not sure if its just the border
                    //      but we probably need to clear this up with a better
                    //      test of support for various css features
                    if( SUBPIXEL_RENDERING ){
                        viewer.element.style.border = '1px solid rgba(255,255,255,0.38)';
                        viewer.element.style['-webkit-box-reflect'] =
                            'below 0px -webkit-gradient('+
                                'linear,left '+
                                'top,left '+
                                'bottom,from(transparent),color-stop(62%,transparent),to(rgba(255,255,255,0.62))'+
                            ')';
                    }

                    drawer.viewer.addOverlay(
                        viewer.element,
                        tile.bounds
                    );
                }

            }else{
                viewer = drawer.collectionOverlays[ tileKey ];
                if( viewer.viewport ){
                    viewer.viewport.resize( tile.size, true );
                    viewer.viewport.goHome( true );
                }
            }

        } else {

            if ( drawer.useCanvas ) {
                // TODO do this in a more performant way
                // specifically, don't save,rotate,restore every time we draw a tile
                if( drawer.viewport.degrees !== 0 ) {
                    offsetForRotation( tile, drawer.canvas, drawer.context, drawer.viewport.degrees );
                    tile.drawCanvas( drawer.context, drawingHandler );
                    restoreRotationChanges( tile, drawer.canvas, drawer.context );
                } else {
                    tile.drawCanvas( drawer.context, drawingHandler );
                }
            } else {
                tile.drawHTML( drawer.canvas );
            }


            tile.beingDrawn = true;
        }

        if( drawer.debugMode ){
            try{
                drawDebugInfo( drawer, tile, lastDrawn.length, i );
            }catch(e){
                $.console.error(e);
            }
        }

        if( drawer.viewer ){
            /**
             * <em>- Needs documentation -</em>
             *
             * @event tile-drawn
             * @memberof OpenSeadragon.Viewer
             * @type {object}
             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
             * @property {OpenSeadragon.Tile} tile
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            drawer.viewer.raiseEvent( 'tile-drawn', {
                tile: tile
            });
        }
    }
}

function offsetForRotation( tile, canvas, context, degrees ){
    var cx = canvas.width / 2,
        cy = canvas.height / 2,
        px = tile.position.x - cx,
        py = tile.position.y - cy;

    context.save();

    context.translate(cx, cy);
    context.rotate( Math.PI / 180 * degrees);
    tile.position.x = px;
    tile.position.y = py;
}

function restoreRotationChanges( tile, canvas, context ){
    var cx = canvas.width / 2,
        cy = canvas.height / 2,
        px = tile.position.x + cx,
        py = tile.position.y + cy;

    tile.position.x = px;
    tile.position.y = py;

    context.restore();
}


function drawDebugInfo( drawer, tile, count, i ){

    if ( drawer.useCanvas ) {
        drawer.context.save();
        drawer.context.lineWidth = 2;
        drawer.context.font = 'small-caps bold 13px ariel';
        drawer.context.strokeStyle = drawer.debugGridColor;
        drawer.context.fillStyle = drawer.debugGridColor;
        drawer.context.strokeRect(
            tile.position.x,
            tile.position.y,
            tile.size.x,
            tile.size.y
        );
        if( tile.x === 0 && tile.y === 0 ){
            drawer.context.fillText(
                "Zoom: " + drawer.viewport.getZoom(),
                tile.position.x,
                tile.position.y - 30
            );
            drawer.context.fillText(
                "Pan: " + drawer.viewport.getBounds().toString(),
                tile.position.x,
                tile.position.y - 20
            );
        }
        drawer.context.fillText(
            "Level: " + tile.level,
            tile.position.x + 10,
            tile.position.y + 20
        );
        drawer.context.fillText(
            "Column: " + tile.x,
            tile.position.x + 10,
            tile.position.y + 30
        );
        drawer.context.fillText(
            "Row: " + tile.y,
            tile.position.x + 10,
            tile.position.y + 40
        );
        drawer.context.fillText(
            "Order: " + i + " of " + count,
            tile.position.x + 10,
            tile.position.y + 50
        );
        drawer.context.fillText(
            "Size: " + tile.size.toString(),
            tile.position.x + 10,
            tile.position.y + 60
        );
        drawer.context.fillText(
            "Position: " + tile.position.toString(),
            tile.position.x + 10,
            tile.position.y + 70
        );
        drawer.context.restore();
    }
}


}( OpenSeadragon ));

/*
 * OpenSeadragon - Viewport
 *
 * Copyright (C) 2009 CodePlex Foundation
 * Copyright (C) 2010-2013 OpenSeadragon contributors
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of CodePlex Foundation nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

(function( $ ){


/**
 * @class Viewport
 * @classdesc Handles coordinate-related functionality (zoom, pan, rotation, etc.) for an {@link OpenSeadragon.Viewer}.
 * A new instance is created for each TileSource opened (see {@link OpenSeadragon.Viewer#viewport}).
 *
 * @memberof OpenSeadragon
 */
$.Viewport = function( options ) {

    //backward compatibility for positional args while prefering more
    //idiomatic javascript options object as the only argument
    var args = arguments;
    if(  args.length && args[ 0 ] instanceof $.Point ){
        options = {
            containerSize:  args[ 0 ],
            contentSize:    args[ 1 ],
            config:         args[ 2 ]
        };
    }

    //options.config and the general config argument are deprecated
    //in favor of the more direct specification of optional settings
    //being passed directly on the options object
    if ( options.config ){
        $.extend( true, options, options.config );
        delete options.config;
    }

    $.extend( true, this, {

        //required settings
        containerSize:      null,
        contentSize:        null,

        //internal state properties
        zoomPoint:          null,
        viewer:           null,

        //configurable options
        springStiffness:    $.DEFAULT_SETTINGS.springStiffness,
        animationTime:      $.DEFAULT_SETTINGS.animationTime,
        minZoomImageRatio:  $.DEFAULT_SETTINGS.minZoomImageRatio,
        maxZoomPixelRatio:  $.DEFAULT_SETTINGS.maxZoomPixelRatio,
        visibilityRatio:    $.DEFAULT_SETTINGS.visibilityRatio,
        wrapHorizontal:     $.DEFAULT_SETTINGS.wrapHorizontal,
        wrapVertical:       $.DEFAULT_SETTINGS.wrapVertical,
        defaultZoomLevel:   $.DEFAULT_SETTINGS.defaultZoomLevel,
        minZoomLevel:       $.DEFAULT_SETTINGS.minZoomLevel,
        maxZoomLevel:       $.DEFAULT_SETTINGS.maxZoomLevel,
        degrees:            $.DEFAULT_SETTINGS.degrees

    }, options );

    this.centerSpringX = new $.Spring({
        initial: 0,
        springStiffness: this.springStiffness,
        animationTime:   this.animationTime
    });
    this.centerSpringY = new $.Spring({
        initial: 0,
        springStiffness: this.springStiffness,
        animationTime:   this.animationTime
    });
    this.zoomSpring    = new $.Spring({
        initial: 1,
        springStiffness: this.springStiffness,
        animationTime:   this.animationTime
    });

    this.resetContentSize( this.contentSize );
    this.goHome( true );
    this.update();
};

$.Viewport.prototype = /** @lends OpenSeadragon.Viewport.prototype */{

    /**
     * @function
     * @return {OpenSeadragon.Viewport} Chainable.
     * @fires OpenSeadragon.Viewer.event:reset-size
     */
    resetContentSize: function( contentSize ){
        this.contentSize    = contentSize;
        this.contentAspectX = this.contentSize.x / this.contentSize.y;
        this.contentAspectY = this.contentSize.y / this.contentSize.x;
        this.fitWidthBounds = new $.Rect( 0, 0, 1, this.contentAspectY );
        this.fitHeightBounds = new $.Rect( 0, 0, this.contentAspectY, this.contentAspectY);

        this.homeBounds = new $.Rect( 0, 0, 1, this.contentAspectY );

        if( this.viewer ){
            /**
             * Raised when the viewer's content size is reset (see {@link OpenSeadragon.Viewport#resetContentSize}).
             *
             * @event reset-size
             * @memberof OpenSeadragon.Viewer
             * @type {object}
             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
             * @property {OpenSeadragon.Point} contentSize
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            this.viewer.raiseEvent( 'reset-size', {
                contentSize: contentSize
            });
        }

        return this;
    },

    /**
     * @function
     */
    getHomeZoom: function() {
        var aspectFactor =
            this.contentAspectX / this.getAspectRatio();

        if( this.defaultZoomLevel ){
            return this.defaultZoomLevel;
        } else {
            return ( aspectFactor >= 1 ) ?
                1 :
                aspectFactor;
        }
    },

    /**
     * @function
     */
    getHomeBounds: function() {
        var center = this.homeBounds.getCenter( ),
            width  = 1.0 / this.getHomeZoom( ),
            height = width / this.getAspectRatio();

        return new $.Rect(
            center.x - ( width / 2.0 ),
            center.y - ( height / 2.0 ),
            width,
            height
        );
    },

    /**
     * @function
     * @param {Boolean} immediately
     * @fires OpenSeadragon.Viewer.event:home
     */
    goHome: function( immediately ) {
        if( this.viewer ){
            /**
             * Raised when the "home" operation occurs (see {@link OpenSeadragon.Viewport#goHome}).
             *
             * @event home
             * @memberof OpenSeadragon.Viewer
             * @type {object}
             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
             * @property {Boolean} immediately
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            this.viewer.raiseEvent( 'home', {
                immediately: immediately
            });
        }
        return this.fitBounds( this.getHomeBounds(), immediately );
    },

    /**
     * @function
     */
    getMinZoom: function() {
        var homeZoom = this.getHomeZoom(),
            zoom = this.minZoomLevel ?
            this.minZoomLevel :
                this.minZoomImageRatio * homeZoom;

        return Math.min( zoom, homeZoom );
    },

    /**
     * @function
     */
    getMaxZoom: function() {
        var zoom = this.maxZoomLevel ?
            this.maxZoomLevel :
                ( this.contentSize.x * this.maxZoomPixelRatio / this.containerSize.x );

        return Math.max( zoom, this.getHomeZoom() );
    },

    /**
     * @function
     */
    getAspectRatio: function() {
        return this.containerSize.x / this.containerSize.y;
    },

    /**
     * @function
     */
    getContainerSize: function() {
        return new $.Point(
            this.containerSize.x,
            this.containerSize.y
        );
    },

    /**
     * @function
     * @param {Boolean} current - Pass true for the current location; defaults to false (target location).
     */
    getBounds: function( current ) {
        var center = this.getCenter( current ),
            width  = 1.0 / this.getZoom( current ),
            height = width / this.getAspectRatio();

        return new $.Rect(
            center.x - ( width / 2.0 ),
            center.y - ( height / 2.0 ),
            width,
            height
        );
    },

    /**
     * @function
     * @param {Boolean} current - Pass true for the current location; defaults to false (target location).
     */
    getCenter: function( current ) {
        var centerCurrent = new $.Point(
                this.centerSpringX.current.value,
                this.centerSpringY.current.value
            ),
            centerTarget = new $.Point(
                this.centerSpringX.target.value,
                this.centerSpringY.target.value
            ),
            oldZoomPixel,
            zoom,
            width,
            height,
            bounds,
            newZoomPixel,
            deltaZoomPixels,
            deltaZoomPoints;

        if ( current ) {
            return centerCurrent;
        } else if ( !this.zoomPoint ) {
            return centerTarget;
        }

        oldZoomPixel = this.pixelFromPoint(this.zoomPoint, true);

        zoom    = this.getZoom();
        width   = 1.0 / zoom;
        height  = width / this.getAspectRatio();
        bounds  = new $.Rect(
            centerCurrent.x - width / 2.0,
            centerCurrent.y - height / 2.0,
            width,
            height
        );

        newZoomPixel    = this.zoomPoint.minus(
            bounds.getTopLeft()
        ).times(
            this.containerSize.x / bounds.width
        );
        deltaZoomPixels = newZoomPixel.minus( oldZoomPixel );
        deltaZoomPoints = deltaZoomPixels.divide( this.containerSize.x * zoom );

        return centerTarget.plus( deltaZoomPoints );
    },

    /**
     * @function
     * @param {Boolean} current - Pass true for the current location; defaults to false (target location).
     */
    getZoom: function( current ) {
        if ( current ) {
            return this.zoomSpring.current.value;
        } else {
            return this.zoomSpring.target.value;
        }
    },

    /**
     * @function
     * @return {OpenSeadragon.Viewport} Chainable.
     * @fires OpenSeadragon.Viewer.event:constrain
     */
    applyConstraints: function( immediately ) {
        var actualZoom = this.getZoom(),
            constrainedZoom = Math.max(
                Math.min( actualZoom, this.getMaxZoom() ),
                this.getMinZoom()
            ),
            bounds,
            horizontalThreshold,
            verticalThreshold,
            left,
            right,
            top,
            bottom,
            dx = 0,
            dy = 0;

        if ( actualZoom != constrainedZoom ) {
            this.zoomTo( constrainedZoom, this.zoomPoint, immediately );
        }

        bounds = this.getBounds();

        horizontalThreshold = this.visibilityRatio * bounds.width;
        verticalThreshold   = this.visibilityRatio * bounds.height;

        left   = bounds.x + bounds.width;
        right  = 1 - bounds.x;
        top    = bounds.y + bounds.height;
        bottom = this.contentAspectY - bounds.y;

        if ( this.wrapHorizontal ) {
            //do nothing
        } else {
            if ( left < horizontalThreshold ) {
                dx = horizontalThreshold - left;
            }
            if ( right < horizontalThreshold ) {
                dx = dx ?
                    ( dx + right - horizontalThreshold ) / 2 :
                    ( right - horizontalThreshold );
            }
        }

        if ( this.wrapVertical ) {
            //do nothing
        } else {
            if ( top < verticalThreshold ) {
                dy = ( verticalThreshold - top );
            }
            if ( bottom < verticalThreshold ) {
                dy =  dy ?
                    ( dy + bottom - verticalThreshold ) / 2 :
                    ( bottom - verticalThreshold );
            }
        }

        if ( dx || dy || immediately ) {
            bounds.x += dx;
            bounds.y += dy;
            if( bounds.width > 1  ){
                bounds.x = 0.5 - bounds.width/2;
            }
            if( bounds.height > this.contentAspectY ){
                bounds.y = this.contentAspectY/2 - bounds.height/2;
            }
            this.fitBounds( bounds, immediately );
        }

        if( this.viewer ){
            /**
             * Raised when the viewport constraints are applied (see {@link OpenSeadragon.Viewport#applyConstraints}).
             *
             * @event constrain
             * @memberof OpenSeadragon.Viewer
             * @type {object}
             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
             * @property {Boolean} immediately
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            this.viewer.raiseEvent( 'constrain', {
                immediately: immediately
            });
        }

        return this;
    },

    /**
     * @function
     * @param {Boolean} immediately
     */
    ensureVisible: function( immediately ) {
        return this.applyConstraints( immediately );
    },

    /**
     * @function
     * @param {OpenSeadragon.Rect} bounds
     * @param {Boolean} immediately
     * @return {OpenSeadragon.Viewport} Chainable.
     */
    fitBounds: function( bounds, immediately ) {
        var aspect = this.getAspectRatio(),
            center = bounds.getCenter(),
            newBounds = new $.Rect(
                bounds.x,
                bounds.y,
                bounds.width,
                bounds.height
            ),
            oldBounds,
            oldZoom,
            newZoom,
            referencePoint;

        if ( newBounds.getAspectRatio() >= aspect ) {
            newBounds.height = bounds.width / aspect;
            newBounds.y      = center.y - newBounds.height / 2;
        } else {
            newBounds.width = bounds.height * aspect;
            newBounds.x     = center.x - newBounds.width / 2;
        }

        this.panTo( this.getCenter( true ), true );
        this.zoomTo( this.getZoom( true ), null, true );

        oldBounds = this.getBounds();
        oldZoom   = this.getZoom();
        newZoom   = 1.0 / newBounds.width;
        if ( newZoom == oldZoom || newBounds.width == oldBounds.width ) {
            return this.panTo( center, immediately );
        }

        referencePoint = oldBounds.getTopLeft().times(
            this.containerSize.x / oldBounds.width
        ).minus(
            newBounds.getTopLeft().times(
                this.containerSize.x / newBounds.width
            )
        ).divide(
            this.containerSize.x / oldBounds.width -
            this.containerSize.x / newBounds.width
        );

        return this.zoomTo( newZoom, referencePoint, immediately );
    },


    /**
     * @function
     * @param {Boolean} immediately
     * @return {OpenSeadragon.Viewport} Chainable.
     */
    fitVertically: function( immediately ) {
        var center = this.getCenter();

        if ( this.wrapHorizontal ) {
            center.x = ( 1 + ( center.x % 1 ) ) % 1;
            this.centerSpringX.resetTo( center.x );
            this.centerSpringX.update();
        }

        if ( this.wrapVertical ) {
            center.y = (
                this.contentAspectY + ( center.y % this.contentAspectY )
            ) % this.contentAspectY;
            this.centerSpringY.resetTo( center.y );
            this.centerSpringY.update();
        }

        return this.fitBounds( this.fitHeightBounds, immediately );
    },

    /**
     * @function
     * @param {Boolean} immediately
     * @return {OpenSeadragon.Viewport} Chainable.
     */
    fitHorizontally: function( immediately ) {
        var center = this.getCenter();

        if ( this.wrapHorizontal ) {
            center.x = (
                this.contentAspectX + ( center.x % this.contentAspectX )
            ) % this.contentAspectX;
            this.centerSpringX.resetTo( center.x );
            this.centerSpringX.update();
        }

        if ( this.wrapVertical ) {
            center.y = ( 1 + ( center.y % 1 ) ) % 1;
            this.centerSpringY.resetTo( center.y );
            this.centerSpringY.update();
        }

        return this.fitBounds( this.fitWidthBounds, immediately );
    },


    /**
     * @function
     * @param {OpenSeadragon.Point} delta
     * @param {Boolean} immediately
     * @return {OpenSeadragon.Viewport} Chainable.
     * @fires OpenSeadragon.Viewer.event:pan
     */
    panBy: function( delta, immediately ) {
        var center = new $.Point(
            this.centerSpringX.target.value,
            this.centerSpringY.target.value
        );
        delta = delta.rotate( -this.degrees, new $.Point( 0, 0 ) );
        return this.panTo( center.plus( delta ), immediately );
    },

    /**
     * @function
     * @param {OpenSeadragon.Point} center
     * @param {Boolean} immediately
     * @return {OpenSeadragon.Viewport} Chainable.
     * @fires OpenSeadragon.Viewer.event:pan
     */
    panTo: function( center, immediately ) {
        if ( immediately ) {
            this.centerSpringX.resetTo( center.x );
            this.centerSpringY.resetTo( center.y );
        } else {
            this.centerSpringX.springTo( center.x );
            this.centerSpringY.springTo( center.y );
        }

        if( this.viewer ){
            /**
             * Raised when the viewport is panned (see {@link OpenSeadragon.Viewport#panBy} and {@link OpenSeadragon.Viewport#panTo}).
             *
             * @event pan
             * @memberof OpenSeadragon.Viewer
             * @type {object}
             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
             * @property {OpenSeadragon.Point} center
             * @property {Boolean} immediately
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            this.viewer.raiseEvent( 'pan', {
                center: center,
                immediately: immediately
            });
        }

        return this;
    },

    /**
     * @function
     * @return {OpenSeadragon.Viewport} Chainable.
     * @fires OpenSeadragon.Viewer.event:zoom
     */
    zoomBy: function( factor, refPoint, immediately ) {
        if( refPoint instanceof $.Point && !isNaN( refPoint.x ) && !isNaN( refPoint.y ) ) {
            refPoint = refPoint.rotate(
                -this.degrees,
                new $.Point( this.centerSpringX.target.value, this.centerSpringY.target.value )
            );
        }
        return this.zoomTo( this.zoomSpring.target.value * factor, refPoint, immediately );
    },

    /**
     * @function
     * @return {OpenSeadragon.Viewport} Chainable.
     * @fires OpenSeadragon.Viewer.event:zoom
     */
    zoomTo: function( zoom, refPoint, immediately ) {

        this.zoomPoint = refPoint instanceof $.Point &&
            !isNaN(refPoint.x) &&
            !isNaN(refPoint.y) ?
            refPoint :
            null;

        if ( immediately ) {
            this.zoomSpring.resetTo( zoom );
        } else {
            this.zoomSpring.springTo( zoom );
        }

        if( this.viewer ){
            /**
             * Raised when the viewport zoom level changes (see {@link OpenSeadragon.Viewport#zoomBy} and {@link OpenSeadragon.Viewport#zoomTo}).
             *
             * @event zoom
             * @memberof OpenSeadragon.Viewer
             * @type {object}
             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
             * @property {Number} zoom
             * @property {OpenSeadragon.Point} refPoint
             * @property {Boolean} immediately
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            this.viewer.raiseEvent( 'zoom', {
                zoom: zoom,
                refPoint: refPoint,
                immediately: immediately
            });
        }

        return this;
    },

    /**
     * Currently only 90 degree rotation is supported and it only works
     * with the canvas. Additionally, the navigator does not rotate yet,
     * debug mode doesn't rotate yet, and overlay rotation is only
     * partially supported.
     * @function
     * @return {OpenSeadragon.Viewport} Chainable.
     */
    setRotation: function( degrees ) {
        if( !( this.viewer && this.viewer.drawer.canRotate() ) ) {
            return this;
        }

        degrees = ( degrees + 360 ) % 360;
        if( degrees % 90 !== 0 ) {
            throw new Error('Currently only 0, 90, 180, and 270 degrees are supported.');
        }
        this.degrees = degrees;
        this.viewer.forceRedraw();
        
        return this;
    },

    /**
     * Gets the current rotation in degrees.
     * @function
     * @return {Number} The current rotation in degrees.
     */
    getRotation: function() {
        return this.degrees;
    },

    /**
     * @function
     * @return {OpenSeadragon.Viewport} Chainable.
     * @fires OpenSeadragon.Viewer.event:resize
     */
    resize: function( newContainerSize, maintain ) {
        var oldBounds = this.getBounds(),
            newBounds = oldBounds,
            widthDeltaFactor;

        this.containerSize = new $.Point(
            newContainerSize.x,
            newContainerSize.y
        );

        if ( maintain ) {
            widthDeltaFactor = newContainerSize.x / this.containerSize.x;
            newBounds.width  = oldBounds.width * widthDeltaFactor;
            newBounds.height = newBounds.width / this.getAspectRatio();
        }

        if( this.viewer ){
            /**
             * Raised when the viewer is resized (see {@link OpenSeadragon.Viewport#resize}).
             *
             * @event resize
             * @memberof OpenSeadragon.Viewer
             * @type {object}
             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
             * @property {OpenSeadragon.Point} newContainerSize
             * @property {Boolean} maintain
             * @property {?Object} userData - Arbitrary subscriber-defined object.
             */
            this.viewer.raiseEvent( 'resize', {
                newContainerSize: newContainerSize,
                maintain: maintain
            });
        }

        return this.fitBounds( newBounds, true );
    },

    /**
     * @function
     */
    update: function() {
        var oldCenterX = this.centerSpringX.current.value,
            oldCenterY = this.centerSpringY.current.value,
            oldZoom    = this.zoomSpring.current.value,
            oldZoomPixel,
            newZoomPixel,
            deltaZoomPixels,
            deltaZoomPoints;

        if (this.zoomPoint) {
            oldZoomPixel = this.pixelFromPoint( this.zoomPoint, true );
        }

        this.zoomSpring.update();

        if (this.zoomPoint && this.zoomSpring.current.value != oldZoom) {
            newZoomPixel    = this.pixelFromPoint( this.zoomPoint, true );
            deltaZoomPixels = newZoomPixel.minus( oldZoomPixel );
            deltaZoomPoints = this.deltaPointsFromPixels( deltaZoomPixels, true );

            this.centerSpringX.shiftBy( deltaZoomPoints.x );
            this.centerSpringY.shiftBy( deltaZoomPoints.y );
        } else {
            this.zoomPoint = null;
        }

        this.centerSpringX.update();
        this.centerSpringY.update();

        return this.centerSpringX.current.value != oldCenterX ||
            this.centerSpringY.current.value != oldCenterY ||
            this.zoomSpring.current.value != oldZoom;
    },


    /**
     * Convert a delta (translation vector) from pixels coordinates to viewport coordinates
     * @function
     * @param {Boolean} current - Pass true for the current location; defaults to false (target location).
     */
    deltaPixelsFromPoints: function( deltaPoints, current ) {
        return deltaPoints.times(
            this.containerSize.x * this.getZoom( current )
        );
    },

    /**
     * Convert a delta (translation vector) from viewport coordinates to pixels coordinates.
     * @function
     * @param {Boolean} current - Pass true for the current location; defaults to false (target location).
     */
    deltaPointsFromPixels: function( deltaPixels, current ) {
        return deltaPixels.divide(
            this.containerSize.x * this.getZoom( current )
        );
    },

    /**
     * Convert image pixel coordinates to viewport coordinates.
     * @function
     * @param {Boolean} current - Pass true for the current location; defaults to false (target location).
     */
    pixelFromPoint: function( point, current ) {
        var bounds = this.getBounds( current );
        return point.minus(
            bounds.getTopLeft()
        ).times(
            this.containerSize.x / bounds.width
        );
    },

    /**
     * Convert viewport coordinates to image pixel coordinates.
     * @function
     * @param {Boolean} current - Pass true for the current location; defaults to false (target location).
     */
    pointFromPixel: function( pixel, current ) {
        var bounds = this.getBounds( current );
        return pixel.divide(
            this.containerSize.x / bounds.width
        ).plus(
            bounds.getTopLeft()
        );
    },

    /**
     * Translates from OpenSeadragon viewer coordinate system to image coordinate system.
     * This method can be called either by passing X,Y coordinates or an
     * OpenSeadragon.Point
     * @function
     * @param {OpenSeadragon.Point} viewerX the point in viewport coordinate system.
     * @param {Number} viewerX X coordinate in viewport coordinate system.
     * @param {Number} viewerY Y coordinate in viewport coordinate system.
     * @return {OpenSeadragon.Point} a point representing the coordinates in the image.
     */
    viewportToImageCoordinates: function( viewerX, viewerY ) {
        if ( arguments.length == 1 ) {
            //they passed a point instead of individual components
            return this.viewportToImageCoordinates( viewerX.x, viewerX.y );
        }
        return new $.Point( viewerX * this.contentSize.x, viewerY * this.contentSize.y * this.contentAspectX );
    },

    /**
     * Translates from image coordinate system to OpenSeadragon viewer coordinate system
     * This method can be called either by passing X,Y coordinates or an
     * OpenSeadragon.Point
     * @function
     * @param {OpenSeadragon.Point} imageX the point in image coordinate system.
     * @param {Number} imageX X coordinate in image coordinate system.
     * @param {Number} imageY Y coordinate in image coordinate system.
     * @return {OpenSeadragon.Point} a point representing the coordinates in the viewport.
     */
    imageToViewportCoordinates: function( imageX, imageY ) {
        if ( arguments.length == 1 ) {
            //they passed a point instead of individual components
            return this.imageToViewportCoordinates( imageX.x, imageX.y );
        }
        return new $.Point( imageX / this.contentSize.x, imageY / this.contentSize.y / this.contentAspectX );
    },

    /**
     * Translates from a rectangle which describes a portion of the image in
     * pixel coordinates to OpenSeadragon viewport rectangle coordinates.
     * This method can be called either by passing X,Y,width,height or an
     * OpenSeadragon.Rect
     * @function
     * @param {OpenSeadragon.Rect} imageX the rectangle in image coordinate system.
     * @param {Number} imageX the X coordinate of the top left corner of the rectangle
     * in image coordinate system.
     * @param {Number} imageY the Y coordinate of the top left corner of the rectangle
     * in image coordinate system.
     * @param {Number} pixelWidth the width in pixel of the rectangle.
     * @param {Number} pixelHeight the height in pixel of the rectangle.
     */
    imageToViewportRectangle: function( imageX, imageY, pixelWidth, pixelHeight ) {
        var coordA,
            coordB,
            rect;
        if( arguments.length == 1 ) {
            //they passed a rectangle instead of individual components
            rect = imageX;
            return this.imageToViewportRectangle(
                rect.x, rect.y, rect.width, rect.height
            );
        }
        coordA = this.imageToViewportCoordinates(
            imageX, imageY
        );
        coordB = this.imageToViewportCoordinates(
            pixelWidth, pixelHeight
        );
        return new $.Rect(
            coordA.x,
            coordA.y,
            coordB.x,
            coordB.y
        );
    },

    /**
     * Translates from a rectangle which describes a portion of
     * the viewport in point coordinates to image rectangle coordinates.
     * This method can be called either by passing X,Y,width,height or an
     * OpenSeadragon.Rect
     * @function
     * @param {OpenSeadragon.Rect} viewerX the rectangle in viewport coordinate system.
     * @param {Number} viewerX the X coordinate of the top left corner of the rectangle
     * in viewport coordinate system.
     * @param {Number} imageY the Y coordinate of the top left corner of the rectangle
     * in viewport coordinate system.
     * @param {Number} pointWidth the width of the rectangle in viewport coordinate system.
     * @param {Number} pointHeight the height of the rectangle in viewport coordinate system.
     */
    viewportToImageRectangle: function( viewerX, viewerY, pointWidth, pointHeight ) {
        var coordA,
            coordB,
            rect;
        if ( arguments.length == 1 ) {
            //they passed a rectangle instead of individual components
            rect = viewerX;
            return this.viewportToImageRectangle(
                rect.x, rect.y, rect.width, rect.height
            );
        }
        coordA = this.viewportToImageCoordinates( viewerX, viewerY );
        coordB = this.viewportToImageCoordinates( pointWidth, pointHeight );
        return new $.Rect(
            coordA.x,
            coordA.y,
            coordB.x,
            coordB.y
        );
    },

    /**
     * Convert pixel coordinates relative to the viewer element to image
     * coordinates.
     * @param {OpenSeadragon.Point} pixel
     * @returns {OpenSeadragon.Point}
     */
    viewerElementToImageCoordinates: function( pixel ) {
        var point = this.pointFromPixel( pixel, true );
        return this.viewportToImageCoordinates( point );
    },

    /**
     * Convert pixel coordinates relative to the image to
     * viewer element coordinates.
     * @param {OpenSeadragon.Point} pixel
     * @returns {OpenSeadragon.Point}
     */
    imageToViewerElementCoordinates: function( pixel ) {
        var point = this.imageToViewportCoordinates( pixel );
        return this.pixelFromPoint( point, true );
    },

    /**
     * Convert pixel coordinates relative to the window to image coordinates.
     * @param {OpenSeadragon.Point} pixel
     * @returns {OpenSeadragon.Point}
     */
    windowToImageCoordinates: function( pixel ) {
        var viewerCoordinates = pixel.minus(
                OpenSeadragon.getElementPosition( this.viewer.element ));
        return this.viewerElementToImageCoordinates( viewerCoordinates );
    },

    /**
     * Convert image coordinates to pixel coordinates relative to the window.
     * @param {OpenSeadragon.Point} pixel
     * @returns {OpenSeadragon.Point}
     */
    imageToWindowCoordinates: function( pixel ) {
        var viewerCoordinates = this.imageToViewerElementCoordinates( pixel );
        return viewerCoordinates.plus(
                OpenSeadragon.getElementPosition( this.viewer.element ));
    },

    /**
     * Convert pixel coordinates relative to the viewer element to viewport
     * coordinates.
     * @param {OpenSeadragon.Point} pixel
     * @returns {OpenSeadragon.Point}
     */
    viewerElementToViewportCoordinates: function( pixel ) {
        return this.pointFromPixel( pixel, true );
    },

    /**
     * Convert viewport coordinates to pixel coordinates relative to the
     * viewer element.
     * @param {OpenSeadragon.Point} point
     * @returns {OpenSeadragon.Point}
     */
    viewportToViewerElementCoordinates: function( point ) {
        return this.pixelFromPoint( point, true );
    },

    /**
     * Convert pixel coordinates relative to the window to viewport coordinates.
     * @param {OpenSeadragon.Point} pixel
     * @returns {OpenSeadragon.Point}
     */
    windowToViewportCoordinates: function( pixel ) {
        var viewerCoordinates = pixel.minus(
                OpenSeadragon.getElementPosition( this.viewer.element ));
        return this.viewerElementToViewportCoordinates( viewerCoordinates );
    },

    /**
     * Convert viewport coordinates to pixel coordinates relative to the window.
     * @param {OpenSeadragon.Point} point
     * @returns {OpenSeadragon.Point}
     */
    viewportToWindowCoordinates: function( point ) {
        var viewerCoordinates = this.viewportToViewerElementCoordinates( point );
        return viewerCoordinates.plus(
                OpenSeadragon.getElementPosition( this.viewer.element ));
    },
    
    /**
     * Convert a viewport zoom to an image zoom.
     * Image zoom: ratio of the original image size to displayed image size.
     * 1 means original image size, 0.5 half size...
     * Viewport zoom: ratio of the displayed image's width to viewport's width.
     * 1 means identical width, 2 means image's width is twice the viewport's width...
     * @function
     * @param {Number} viewportZoom The viewport zoom
     * target zoom.
     * @returns {Number} imageZoom The image zoom
     */
    viewportToImageZoom: function( viewportZoom ) {
        var imageWidth = this.viewer.source.dimensions.x;
        var containerWidth = this.getContainerSize().x;
        var viewportToImageZoomRatio = containerWidth / imageWidth;
        return viewportZoom * viewportToImageZoomRatio;
    },
    
    /**
     * Convert an image zoom to a viewport zoom.
     * Image zoom: ratio of the original image size to displayed image size.
     * 1 means original image size, 0.5 half size...
     * Viewport zoom: ratio of the displayed image's width to viewport's width.
     * 1 means identical width, 2 means image's width is twice the viewport's width...
     * @function
     * @param {Number} imageZoom The image zoom
     * target zoom.
     * @returns {Number} viewportZoom The viewport zoom
     */
    imageToViewportZoom: function( imageZoom ) {
        var imageWidth = this.viewer.source.dimensions.x;
        var containerWidth = this.getContainerSize().x;
        var viewportToImageZoomRatio = imageWidth / containerWidth;
        return imageZoom * viewportToImageZoomRatio;
    }
};

}( OpenSeadragon ));

(function($) {
  var __osd_counter = 0;
  function generateOsdId() {
    __osd_counter++;
    
    return "Openseadragon" + __osd_counter;
  }

  function initOpenSeadragon() {
    $('picture[data-openseadragon]').each(function() {
      var $picture = $(this);
      
      if (typeof $picture.attr('id') === "undefined") {
        $picture.attr('id', generateOsdId());
      }

      var collectionOptions = $picture.data('openseadragon');
      
      var sources = $picture.find('source[media="openseadragon"]');

      var tilesources = $.map(sources, function(e) {
        if ($(e).data('openseadragon')) {
          return $(e).data('openseadragon');
        } else {
          return $(e).attr('src');
        }
      });
      
      $picture.css("display", "block");
      $picture.css("height", "500px");

      OpenSeadragon(
        $.extend({ id: $picture.attr('id') }, collectionOptions, { tileSources: tilesources })
      );
    });
  };

  window.onload = initOpenSeadragon;
  document.addEventListener("page:load", initOpenSeadragon);
})(jQuery);
(function($){
  $.fn.addNewPageButton = function( options ) {
    $.each(this, function(){
      addExpandBehaviorToButton($(this));
    });
    function addExpandBehaviorToButton(button){
      var settings = $.extend({
        speed: (button.data('speed') || 450),
        animate_width: (button.data('animate_width') || 425)
      }, options);
      var target = $(button.data('field-target'));
      var save   = $("input[data-behavior='save']", target);
      var cancel = $("input[data-behavior='cancel']", target);
      var input  = $("input[type='text']", target);
      var original_width  = button.outerWidth();

      // Animate button open when the mouse enters or
      // the button is given focus (i.e. clicked/tabbed)
      button.on("mouseenter focus", function(){
        expandButton();
      });

      // Don't allow blank titles
      save.on('click', function(){
        if ( inputEmpty() ) {
          return false;
        }
      });

      // Empty input and collapse
      // button on cancel click
      cancel.on('click', function(e){
        e.preventDefault();
        input.val('');
        collapseButton();
      });

      // Collapse the button on when
      // an empty input loses focus
      input.on("blur", function(){
        if ( inputEmpty() ) {
          collapseButton();
        }
      });
      function expandButton(){
        if(button.outerWidth() <= (original_width + 5)) {
          button.animate(
            {width: settings.animate_width + 'px'}, settings.speed, function(){
              target.show(0, function(){
                input.focus();
                // Set the button to auto width to make
                // sure it has room for any inputs
                button.width("auto");
                // Explicitly set the width of the button
                // so the close animation works properly
                button.width(button.width());
              });
            }
          )
        }
      }
      function collapseButton(){
        target.hide();
        button.animate({width: original_width + 'px'}, settings.speed);
      }
      function inputEmpty(){
        return $.trim(input.val()) == "";
      }
    }
  }
})( jQuery );
Spotlight.onLoad(function() {
  $("[data-expanded-add-button]").addNewPageButton();
});
Spotlight.onLoad(function(){
  $('#nested-navigation').nestable({maxDepth: 1});
  updateWeightsAndRelationships($('#nested-navigation'));
  addRestoreDefaultBehavior();
});

function addRestoreDefaultBehavior(){
  $("[data-behavior='restore-default']").each(function(){
    var hidden = $("[data-default-value]", $(this));
    var value = $($("[data-in-place-edit-target]", $(this)).data('in-place-edit-target'), $(this));
    var button = $("[data-restore-default]", $(this));
    hidden.on('blur', function(){
      if( $(this).val() == $(this).data('default-value') ) {
        button.addClass('hidden');
      } else {
        button.removeClass('hidden');
      }
    });
    button.on('click', function(e){
      e.preventDefault();
      hidden.val(hidden.data('default-value'));
      value.text(hidden.data('default-value'));
      button.hide();
    });
  });
}
;
// Place all the behaviors and hooks related to the matching controller here.
// All this logic will automatically be available in application.js.
;
Spotlight.onLoad(function() {
  // Add Select/Deselect all button behavior
  addCheckboxToggleBehavior();

  // Initialize Nestable for nested pages
  $('#nested-fields .metadata_fields').nestable({maxDepth: 1, listNodeName: "tbody", itemNodeName: "tr", expandBtnHTML: "", collapseBtnHTML: "" });
  $('#nested-fields.facet_fields').nestable({maxDepth: 1});

  // Handle weighting the pages and their children.
  updateWeightsAndRelationships($('#nested-fields .metadata_fields'));
  updateWeightsAndRelationships($('#nested-fields.facet_fields'));

  $("[data-in-place-edit-target]").on('click.inplaceedit', function() {
    var $input = $(this).find('input');
    var $label = $(this).find($(this).data('in-place-edit-target'));

    // hide the edit-in-place affordance icon while in edit mode
    $(this).addClass('hide-edit-icon');
    $label.hide();
    $input.val($label.text());
    $input.attr('type', 'text');
    $input.select();
    $input.focus();

    $input.on('keypress', function(e) {
      if(e.which == 13) {
        $input.trigger('blur.inplaceedit');
        return false;
      }
    });

    $input.on('blur.inplaceedit', function() {
      $label.text($input.val());
      $label.show();
      $input.attr('type', 'hidden');
      // when leaving edit mode, should no longer hide edit-in-place affordance icon
      $("[data-in-place-edit-target]").removeClass('hide-edit-icon');

      return false;
    });

    return false;
  });
});

// Add Select/Deselect all button behavior
function addCheckboxToggleBehavior() {
  $("[data-behavior='metadata-select']").each(function(){
    var button = $(this)
    var parentCell = button.parents("th");
    var table = parentCell.closest("table");
    var columnRows = $("tr td:nth-child(" + (parentCell.index() + 1) + ")", table);
    var checkboxes = $("input[type='checkbox']", columnRows);
    swapSelectAllButtonText(button, columnRows);
    // Add the check/uncheck behavior to the button
    // and swap the button text if necessary
    button.on('click', function(e){
      e.preventDefault();
      var allChecked = allCheckboxesChecked(columnRows);
      columnRows.each(function(){
        $("input[type='checkbox']", $(this)).prop('checked', !allChecked);
        swapSelectAllButtonText(button, columnRows);
      });
    });
    // Swap button text when a checkbox value changes
    checkboxes.each(function(){
      $(this).on('change', function(){
        swapSelectAllButtonText(button, columnRows);
      });
    });
  });
  // Check number of checkboxes against the number of checked
  // checkboxes to determine if all of them are checked or not
  function allCheckboxesChecked(elements) {
    return ($("input[type='checkbox']", elements).length == $("input[type='checkbox']:checked", elements).length)
  }
  // Swap the button text to "Deselect all"
  // when all the checkboxes are checked and
  // "Select all" when any are unchecked
  function swapSelectAllButtonText(button, elements) {
    if ( allCheckboxesChecked(elements) ) {
      button.text(button.data('deselect-text'));
    } else {
      button.text(button.data('select-text'));
    }
  }
}
;
(function ($){
  Spotlight.Block = SirTrevor.Block.extend({
    editorHTML: function() {
      return this.template(this);
    },
    formId: function(id) {
      return this.blockID + "_" + id;
    },
    onBlockRender: function() {
      addAutocompletetoSirTrevorForm();
    },
    toData: function() {
      var data = {};


      /* Simple to start. Add conditions later */
      if (this.hasTextBlock()) {
        var content = this.getTextBlock().html();
        if (content.length > 0) {
          data.text = SirTrevor.toMarkdown(content, this.type);
        } else {
          data.text = "";
        }
      }

      // Add any inputs to the data attr
      var inputs = this.$(':input').
          not('.st-paste-block').
          not('button').
          not(':input:checkbox,:input:radio').
          add(this.$(':input:checkbox:checked')).
          add(this.$(':input:radio:checked')).
          add(this.$('select'))

      // unchecked checkboxes
      this.$(':input:checkbox,:input:radio').not(':input:checkbox:checked').not(':input:radio:checked').each(function(index,input) {
        var key = $(input).data('key') || input.getAttribute('name');
        if (key) {
          data[key] = null;
        }
      });

      if(inputs.length > 0) {
        inputs.each(function(index,input){
          var key = $(input).data('key') || input.getAttribute('name');
          if (key) {
            if($(input).is(':checkbox') && $(input).val() == "true") {
              data[key] = true;
            } else {
              data[key] = $(input).val();
            }
          }
        });
      }

      // Set
      if(!_.isEmpty(data)) {
        this.setData(data);
      }
    },

    loadFormDataByKey: function(data) {
      this.$(':input').not('button').each(function(index, input) {
        var key = $(input).data('key') || input.getAttribute('name');
        // by wrapping it in an array, it'll "just work" for radio and checkbox fields too
        $(this).val([data[key]]);
      });
    },

    loadData: function(data){
      if (this.hasTextBlock()) {
        this.getTextBlock().html(SirTrevor.toHTML(data.text, this.type));
      }
      this.loadFormDataByKey(data);
      this.afterLoadData(data);
    },

    afterLoadData: function(data) { },

    caption_field_template: _.template(['<option value="<%= field %>"><%= label %></option>'].join("\n")),

    loadCaptionField: function(){
      var block = this;
      var metadata_url = $('form[data-metadata-url]').data('metadata-url');
      var primary_caption_field = $('#' + this.formId(this.primary_field_key));
      var secondary_caption_field = $('#' + this.formId(this.secondary_field_key));
      var primary_caption_selected_value = primary_caption_field.data("select-after-ajax");
      var secondary_caption_selected_value = secondary_caption_field.data("select-after-ajax");
      $.ajax({
        accepts: "json",
        url: metadata_url
      }).success(function(data){
        // Only checking the primary caption field
        // Could check both but I'm not sure it's necessary
        if($("option", primary_caption_field).length == 2){
          var options = "";
          $.each(data, function(i, field){
            options += block.caption_field_template(field);
          });

          primary_caption_field.append(options);
          secondary_caption_field.append(options);

          primary_caption_field.val([primary_caption_selected_value]);
          secondary_caption_field.val([secondary_caption_selected_value]);
          // re-serialize the form so the form observer
          // knows about the new drop down options.
          serializeFormStatus($('form[data-metadata-url]'));
        }
      });
    },

    addCaptionSelectFocus: function(){
      $("[data-behavior='item-caption-admin']").each(function(){
        var checkbox = $('input[type="checkbox"]', $(this));
        var select = $('select', $(this));
        checkbox.on('change', function(){
          if ( $(this).is(':checked') ) {
            select.focus();
          }
        });
        select.on('change', function(){
          checkbox.prop('checked', !($(this).val() == ""))
        });
      });
    }

  });


  SirTrevor.BlockControl.prototype.render = function() {
    this.$el.html('<span class="st-icon st-icon-'+ _.result(this.block_type, "type") + '">'+ _.result(this.block_type, 'icon_name') +'</span>' + _.result(this.block_type, 'title'));
    return this;
  };
})(jQuery);
/*
  Sir Trevor MutliUpItemGrid Block.
  This block takes an ID,
  fetches the record from solr,
  displays the image, title,
  and any provided text
  and displays them.
*/


SirTrevor.Blocks.MultiUpItemGrid =  (function(){
  
  return Spotlight.Block.extend({

    key: "item-grid",
    id_key: "item-grid-id",
    display_checkbox: "item-grid-display",
    panel: 'typeahead-panel',
    thumbnail_key: 'item-grid-thumbnail',
    primary_field_key: "item-grid-primary-caption-field",
    show_primary_caption: "show-primary-caption",
    secondary_field_key: "item-grid-secondary-caption-field",
    show_secondary_caption: "show-secondary-caption",
    title_key: "spotlight_title_field",

    type: "multi-up-item-grid",

    title: function() { return "Multi-Up Item Grid"; },

    icon_name: "multi-up-item-grid",

    onBlockRender: function() {
      Spotlight.Block.prototype.onBlockRender.apply();
      this.loadCaptionField();
      this.addCaptionSelectFocus();
      this.makeItemGridNestable();
    },

    afterLoadData: function(data){
      // set a data attribute on the select fields so the ajax request knows which option to select
      this.$('select#' + this.formId(this.primary_field_key)).data('select-after-ajax', data[this.primary_field_key]);
      this.$('select#' + this.formId(this.secondary_field_key)).data('select-after-ajax', data[this.secondary_field_key]);
      var context = this;
      var i = 0;
      context.$('[data-target-panel]').each(function(){
        if ($(this).prop("value") != "") {
          swapInputForPanel($(this), context.$($(this).data('target-panel')), {
            id: data[context.id_key + "_" + i],
            title: data[context.id_key + "_" + i + "_title"],
            thumbnail: data[context.thumbnail_key + "_" + i]
          });
        }
        i++;
      });
    },

    description: "This widget displays one to five thumbnail images of repository items in a single row grid. Optionally, you can a caption below each image..",

    template: _.template([
    '<div class="form-inline <%= key %>-admin clearfix">',
      '<div class="widget-header">',
        '<%= description %>',
      '</div>',
      '<div class="col-sm-8">',
        '<label for="<%= formId(id_key) %>_0" class="control-label">Selected items to display</label>',
        '<div class="form-group panel-group dd nestable-item-grid">',
          '<ol class="dd-list">',
            '<%= buildInputFields(inputFieldsCount) %>',
          '</ol>',
        '</div>',
      '</div>',
      '<div class="col-sm-4">',
        '<div class="field-select primary-caption" data-behavior="item-caption-admin">',
          '<input name="<%= show_primary_caption %>" id="<%= formId(show_primary_caption) %>" type="checkbox" value="true" />',
          '<label for="<%= formId(show_primary_caption) %>">Primary caption</label>',
          '<select name="<%= primary_field_key %>" id="<%= formId(primary_field_key) %>">',
            '<option value="">Select...</option>',
            '<%= caption_field_template({field: title_key, label: "Title", selected: ""}) %>',
          '</select>',
        '</div>',
        '<div class="field-select secondary-caption" data-behavior="item-caption-admin">',
          '<input name="<%= show_secondary_caption %>" id="<%= formId(show_secondary_caption) %>" type="checkbox" value="true" />',
          '<label for="<%= formId(show_secondary_caption) %>">Secondary caption</label>',
          '<select name="<%= secondary_field_key %>" id="<%= formId(secondary_field_key) %>">',
            '<option value="">Select...</option>',
            '<%= caption_field_template({field: title_key, label: "Title", selected: ""}) %>',
          '</select>',
        '</div>',
      '</div>',
    '</div>'
  ].join("\n")),

  makeItemGridNestable: function() {
    $('.nestable-item-grid').nestable({maxDepth: 1});
    $('.nestable-item-grid').on('change', function(){
      var i = 0;
      $('li.dd-item', $(this)).each(function(){
        $("[data-nestable-observe]", $(this)).each(function(){
          replaceName($(this), i)
        });
        replaceName($("[data-target-panel='#" + $(this).attr('id') + "']"), i);
        i++;
      });
    });
    addRemoveAutocompletedPanelBehavior();
  },

  inputFieldsCount: 5,

  buildInputFields: function(times) {
    output = '<input type="hidden" name="<%= id_key %>_count" value="' + times + '"/>';
    for(var i=0; i < times; i++){
      output += '<div class="col-sm-11 field">';
        output += '<li class="dd-item dd3-item" style="display:none" data-id="' + (i+1) + '" id="<%= formId(panel + "_' + i + '") %>">';
          output += '<div class="dd-handle dd3-handle">Drag</div>';
          output += '<div class="dd3-content panel panel-default">';
            output += '<div class="panel-heading item-grid">';
              output += '<div class="checkbox">';
                output += '<input name="<%= display_checkbox + "_' + i + '" %>" id="<%= formId(display_checkbox + "_' + i + '") %>" type="checkbox" class="item-grid-checkbox" value="true" data-nestable-observe="true" />';
              output += '</div>';
              output += '<div class="pic thumbnail">';
                output += '<img style="display:none" />';
                output += '<input type="hidden" name="<%= thumbnail_key + "_' + i + '" %>" id="<%= formId(thumbnail_key + "_' + i + '") %>" data-item-grid-thumbnail="true" data-nestable-observe="true" />';
              output += '</div>';
              output += '<div class="main">';
                output += '<div class="title panel-title" data-panel-title="true"></div>';
                output += '<div data-panel-id-display="true"></div>';
              output += '</div>';
              output += '<div class="remove pull-right">';
                output += '<a data-item-grid-panel-remove="true" href="#">Remove</a>'
              output += '</div>';
              output += '<input name="<%= id_key + "_' + i + '" %>" class="item-grid-input" type="hidden" id="<%= formId(id_key + "_' + i + '") %>" data-nestable-observe="true" />';
            output += '</div>';
          output += '</div>';
        output += '</li>';
        output += '<input data-target-panel="#<%= formId(panel + "_' + i + '") %>" data-checkbox_field="#<%= formId(display_checkbox + "_' + i + '") %>" data-id_field="#<%= formId(id_key + "_' + i + '") %>" name="<%= id_key + "_' + i + '_title" %>" class="st-input-string item-grid-input form-control" data-twitter-typeahead="true" type="text" id="<%= formId(id_key + "_' + i + '_title") %>" data-nestable-observe="true" />';
      output += '</div>';
    }
    return _.template(output)(this);
  }
  });
})();
SirTrevor.Blocks.ItemCarousel =  (function(){

  return SirTrevor.Blocks.MultiUpItemGrid.extend({

    type: "item-carousel",

    title: function() { return "Carousel"; },

    icon_name: "item-carousel",

    description: "This widget displays one to five thumbnail images of repository items in a carousel. Optionally, you can a caption below each image.."
  });
})();;
SirTrevor.Blocks.ItemFeatures =  (function(){

  return SirTrevor.Blocks.MultiUpItemGrid.extend({

    type: "item-features",

    title: function() { return "Featured Items"; },

    icon_name: "item-features",

    description: "This widget displays one to five thumbnail images of repository items in a slideshow."
  });
})();;
/*
  Sir Trevor ItemText Block.
  This block takes an ID,
  fetches the record from solr,
  displays the image, title, 
  and any provided text
  and displays them.
*/


SirTrevor.Blocks.ItemText =  (function(){

  return Spotlight.Block.extend({

    id_key:"item-id",
    id_text_key:"item-text-id",
    title_key: "spotlight_title_field",
    panel: "item-panel",
    primary_field_key: "item-grid-primary-caption-field",
    thumbnail_key: "item-thumbnail",
    show_primary_field_key: "show-primary-caption",
    secondary_field_key: "item-grid-secondary-caption-field",
    show_secondary_field_key: "show-secondary-caption",
    text_key:"item-text",
    align_key:"text-align",

    type: "item-text",

    title: function() { return "Item + Text"; },

    icon_name: "item-text",

    onBlockRender: function() {
      Spotlight.Block.prototype.onBlockRender.apply();
      $('#' + this.formId(this.id_text_key)).focus();
      this.loadCaptionField();
      this.addCaptionSelectFocus();
      addRemoveAutocompletedPanelBehavior();
    },

    afterLoadData: function(data){
      // set a data attribute on the select fields so the ajax request knows which option to select
      this.$('select#' + this.formId(this.primary_field_key)).data('select-after-ajax', data[this.primary_field_key]);
      this.$('select#' + this.formId(this.secondary_field_key)).data('select-after-ajax', data[this.secondary_field_key]);
      var context = this;
      context.$('[data-target-panel]').each(function(){
        if ($(this).prop("value") != "") {
          swapInputForPanel($(this), context.$($(this).data('target-panel')), {
            id: data[context.id_key],
            title: data[context.id_text_key],
            thumbnail: data[context.thumbnail_key + "_0"]
          });
        }
      });
    },

    template: _.template([
    '<div class="form-horizontal item-text-admin">',
      '<div class="widget-header">',
        'This widget displays a thumbnail image of the repository item you selected and a text block to the left or right of it.',
      '</div>',
      '<div class="col-sm-8">',
        '<div class="form-group">',
          '<div class="col-sm-11 field">',
            '<label for="<%= formId(id_text_key) %>" class="control-label">Selected item</label>',
            '<li class="dd-item dd3-item" style="display:none" id="<%= formId(panel + "_0") %>">',
              '<div class="dd3-content panel panel-default">',
                '<div class="panel-heading item-grid">',
                  '<div class="pic thumbnail">',
                    '<img style="display:none" />',
                    '<input type="hidden" name="<%= thumbnail_key + "_0" %>" id="<%= formId(thumbnail_key + "_0") %>" data-item-grid-thumbnail="true" data-nestable-observe="true" />',
                  '</div>',
                  '<div class="main">',
                    '<div class="title panel-title" data-panel-title="true"></div>',
                    '<div data-panel-id-display="true"></div>',
                  '</div>',
                  '<div class="remove pull-right">',
                    '<a data-item-grid-panel-remove="true" href="#">Remove</a>',
                  '</div>',
                '</div>',
              '</div>',
              '<input name="<%= id_key %>" type="hidden" id="<%= formId(id_key) %>" />',
            '</li>',
            '<input data-id_field="#<%= formId(id_key) %>" name="<%= id_text_key %>"',
            ' class="st-input-string form-control <%= type %>" type="text" id="<%= formId(id_text_key) %>" data-twitter-typeahead="true" data-target-panel="#<%= formId(panel + "_0") %>" />',
          '</div>',
        '</div>',
        '<div class="form-group">',
          '<div class="col-sm-11 field">',
            '<label for="<%= formId(text_key) %>" class="control-label">Text</label>',
            '<div id="<%= formId(text_key) %>" class="st-text-block" contenteditable="true"></div>',
          '</div>',
        '</div>',
      '</div>',
      '<div class="col-sm-4">',
        '<div class="field-select primary-caption" data-behavior="item-caption-admin">',
          '<input name="<%= show_primary_field_key %>" id="<%= formId(show_primary_field_key) %>" type="checkbox" value="true" />',
          '<label for="<%= formId(show_primary_field_key) %>">Primary caption</label>',
          '<select name="<%= primary_field_key %>" id="<%= formId(primary_field_key) %>">',
            '<option value="">Select...</option>',
            '<%= caption_field_template({field: title_key, label: "Title", selected: ""}) %>',
          '</select>',
        '</div>',
        '<div class="field-select secondary-caption" data-behavior="item-caption-admin">',
          '<input name="<%= show_secondary_field_key %>" id="<%= formId(show_secondary_field_key) %>" type="checkbox" value="true" />',
          '<label for="<%= formId(show_secondary_field_key) %>">Secondary caption</label>',
          '<select name="<%= secondary_field_key %>" id="<%= formId(secondary_field_key) %>">',
            '<option value="">Select...</option>',
            '<%= caption_field_template({field: title_key, label: "Title", selected: ""}) %>',
          '</select>',
        '</div>',
        '<div class="text-align">',
          '<p>Display text on:</p>',
          '<input data-key="<%= align_key %>" type="radio" name="<%= formId(align_key) %>" id="<%= formId(align_key + "-right") %>" value="right" checked="true">',
          '<label for="<%= formId(align_key + "-right") %>">Left</label>',
          '<input data-key="<%= align_key %>" type="radio" name="<%= formId(align_key) %>" id="<%= formId(align_key + "-left") %>" value="left">',
          '<label for="<%= formId(align_key + "-left") %>">Right</label>',
        '</div>',
      '</div>',
      '<div class="clearFix"></div>',
    '</div>'
  ].join("\n"))
  });
})();
/*
  Sir Trevor ItemText Block.
  This block takes an ID,
  fetches the record from solr,
  displays the image, title, 
  and any provided text
  and displays them.
*/


SirTrevor.Blocks.Oembed =  (function(){

  return Spotlight.Block.extend({

    id_key:"url",
    text_key:"item-text",
    align_key:"text-align",

    type: "oembed",

    title: function() { return "Embed + Text"; },

    icon_name: "oembed",

    template: _.template([
    '<div class="form-horizontal oembed-text-admin clearfix">',
      '<div class="widget-header">',
        'This widget embeds a web resource and a text block to the left or right of it.',
      '</div>',
      '<div class="col-sm-9">',
        '<div class="form-group">',
          '<label for="<%= formId(id_key) %>" class="col-sm-2 control-label">URL</label>',
          '<div class="col-sm-6 field">',
            '<input name="<%= id_key %>" class="st-input-string form-control <%= type %>" type="text" id="<%= formId(id_key) %>" />',
          '</div>',
        '</div>',
        '<div class="form-group">',
          '<label for="<%= formId(text_key) %>" class="col-sm-2 control-label">Text</label>',
          '<div class="col-sm-6 field">',
          '<div id="<%= formId(text_key) %>" class="st-text-block" contenteditable="true"></div>',
          '</div>',
        '</div>',
      '</div>',
      '<div class="col-sm-3">',
        '<div class="text-align">',
          '<p>Display text on:</p>',
          '<input data-key="<%= align_key %>" type="radio" name="<%= formId(align_key) %>" id="<%= formId(align_key + "-right") %>" value="right" checked="true">',
          '<label for="<%= formId(align_key + "-right") %>">Left</label>',
          '<input data-key="<%= align_key %>" type="radio" name="<%= formId(align_key) %>" id="<%= formId(align_key + "-left") %>" value="left">',
          '<label for="<%= formId(align_key + "-left") %>">Right</label>',
        '</div>',
      '</div>',
      '<div class="clearFix"></div>',
    '</div>'
  ].join("\n"))
  });
})();
/*
  Simple Image Block
*/


SirTrevor.Blocks.SearchResults =  (function(){

  return Spotlight.Block.extend({

  searches_key: "searches-options",

  view_types_key: '[data-behavior="result-view-types"]',

  description: "This widget displays a set of search results on a page. Specify a search result set by selecting an existing browse category. You can also select the view types that are available to the user when viewing the result set.",

  template: _.template([
    '<div class="search-block-admin clearFix">',
      '<div class="widget-header">',
        '<%= description %>',
      '</div>',
      '<div class="col-sm-8">',
        '<label for="<%= this.formId(this.searches_key) %>">Browse category</label>',
        '<div>',
          '<select name="<%= this.searches_key %>" id="<%= this.formId(this.searches_key) %>">',
            '<option value="">Select...</option>',
          '</select>',
        '</div>',
      '</div>',
      '<div class="col-sm-4" data-behavior="result-view-types">',
        '<h4>Result view types</h4>',
      '</div>',
    '</div>'
  ].join("\n")),

  onBlockRender: function(data){
    Spotlight.Block.prototype.onBlockRender.apply();
    this.loadSearchOptions();
    this.loadViewTypes();
  },

  afterLoadData: function(data){
    // set a data attribute on the select fields so the ajax request knows which option to select
    this.$('select#' + this.formId(this.searches_key)).data('select-after-ajax', data[this.searches_key]);
    this.serializeViewTypes(data);
  },

  loadSearchOptions: function(){
    var block = this;
    var searches_url = $('form[data-searches-endpoint]').data('searches-endpoint');
    var searches_field = $('#' + this.formId(this.searches_key));
    var searches_selected_value = searches_field.data("select-after-ajax");
    $.ajax({
      accepts: "json",
      url: searches_url
    }).success(function(data){
      if($("option", searches_field).length == 1){
        var options = "";
        $.each(data.searches, function(i, search){
          options += "<option value='" + search.id + "'>" + search.title + "</option>";
        });

        searches_field.append(options);

        searches_field.val([searches_selected_value]);
        // re-serialze the form so the form observer
        // knows about the new drop dwon options.
        serializeFormStatus($('form[data-searches-endpoint]'));
      }
    });
  },

  loadViewTypes: function(){
    var view_types_url = $('form[data-available-configurations-endpoint]').data('available-configurations-endpoint');
    var selected_view_types = this.processSelectedViewTypes(this.viewTypesArea().data("select-after-ajax"));
    var block = this;
    $.ajax({
      accepts: "json",
      url: view_types_url
    }).success(function(data){
      var checkboxes = "";
      $.each(data.view, function(view_type, opts){
        checkboxes += "<div>";
          checkboxes += "<label for='" + block.formId(view_type) + "'>";
            checkboxes += "<input id='" + block.formId(view_type) + "' name='" + view_type + "' type='checkbox' " + block.checkViewType(view_type) + " /> ";
            checkboxes += block.capitalize(view_type);
          checkboxes += "</label>";
        checkboxes += "</div>";
      });
      block.viewTypesArea().append(checkboxes);
      // re-serialze the form so the form observer
      // knows about the new checkboxes.
      serializeFormStatus($('form[data-searches-endpoint]'));
    });
  },

  serializeViewTypes: function(data){
    var types = [];
    $.each(data, function(key, value){
      if ( value == "on" ) {
        types.push(key);
      }
    });
    this.viewTypesArea().data('select-after-ajax', types.join(","));
  },

  processSelectedViewTypes: function(typeString) {
    return (typeString || "").split(",");
  },

  capitalize: function (text) {
      return text.charAt(0).toUpperCase() + text.slice(1);
  },

  checkViewType: function(type){
    if (this.viewTypeSelected(type)) {
      return " checked='checked'";
    }
  },

  viewTypesArea: function(){
    return this.$(this.view_types_key);
  },

  viewTypeSelected: function(type){
    return (this.processSelectedViewTypes(this.viewTypesArea().data('select-after-ajax')).indexOf(type) > -1)
  },

  type: "search_results",

  title: function() { return "Search Results"; },

  icon_name: 'search_results',
});
})();
/*! waitForImages jQuery Plugin 2013-07-20 */

!function(a){var b="waitForImages";a.waitForImages={hasImageProperties:["backgroundImage","listStyleImage","borderImage","borderCornerImage","cursor"]},a.expr[":"].uncached=function(b){if(!a(b).is('img[src!=""]'))return!1;var c=new Image;return c.src=b.src,!c.complete},a.fn.waitForImages=function(c,d,e){var f=0,g=0;if(a.isPlainObject(arguments[0])&&(e=arguments[0].waitForAll,d=arguments[0].each,c=arguments[0].finished),c=c||a.noop,d=d||a.noop,e=!!e,!a.isFunction(c)||!a.isFunction(d))throw new TypeError("An invalid callback was supplied.");return this.each(function(){var h=a(this),i=[],j=a.waitForImages.hasImageProperties||[],k=/url\(\s*(['"]?)(.*?)\1\s*\)/g;e?h.find("*").addBack().each(function(){var b=a(this);b.is("img:uncached")&&i.push({src:b.attr("src"),element:b[0]}),a.each(j,function(a,c){var d,e=b.css(c);if(!e)return!0;for(;d=k.exec(e);)i.push({src:d[2],element:b[0]})})}):h.find("img:uncached").each(function(){i.push({src:this.src,element:this})}),f=i.length,g=0,0===f&&c.call(h[0]),a.each(i,function(e,i){var j=new Image;a(j).on("load."+b+" error."+b,function(a){return g++,d.call(i.element,g,f,"load"==a.type),g==f?(c.call(h[0]),!1):void 0}),j.src=i.src})})}}(jQuery);

(function($){
  var slideshowBlock = function (element, options) {
    this.$element = $(element);
    this.options  = options;
    this.paused   = false;
    this.activeIndex = 0;

    this.init = function() {
      this.$items = this.$element.find('.item');
      this.$indicators = this.$element.find('.slideshow-indicators li');

      this.prepAndStart();
      this.attachEvents();
    }

    this.init();
  }


  slideshowBlock.prototype = {

    // Slide to a given image and adjust indicators
    slide: function(item) {
      if (this.elementExistsInDom()) {
        this.activeIndex = this.$items.index(item);

        this.$items.hide();
        $(item).fadeIn();

        this.$indicators.removeClass('active');
        $(this.$indicators[this.activeIndex]).addClass('active');

        if (this.options.autoPlay && !this.paused) this.play();

        return this;

      } else {
        this.destroy();
      }
    },

    // Play slideshow using preset interval
    play: function() {
      this.paused = false;

      if (this.interval) clearInterval(this.interval);
      this.interval = setInterval($.proxy(this.next, this), this.options.interval);
    },

    // Pause slideshow
    pause: function() {
      this.paused = true;
      this.interval = clearInterval(this.interval);

      return this;
    },

    // Next function for attaching events in play
    next: function() {
      return this.to('next');
    },

    // Navigate to
    to: function(pos) {
      if (pos === 'next') pos = this.activeIndex + 1;
      if (pos === 'prev') pos = this.activeIndex - 1;

      return this.slide(this.$items[this.getValidIndex(pos)]);
    },

    // Validate a given index
    getValidIndex: function(index) {
      if (typeof index === 'undefined' || index > (this.$items.length - 1)) index = 0;
      if (index < 0) index = this.$items.length - 1;

      return index;
    },

    // Resize/re-position elements to a fixed and start slideshow
    prepAndStart: function() {
      var maxHeight = 1,
          _this = this;

      // wait for all images to load, find the biggest image size and balance others
      this.$element.waitForImages(function() {
        $.each(_this.$items.find('a > img'), function(index, img) {
          maxHeight = Math.max(maxHeight, $(img).outerHeight());
        });

        maxHeight = Math.min(maxHeight, _this.options.size);

        $.each(_this.$items, function(index, item) {
          var img = $(item).find('a > img');

          // resize the image (if larger than config size)
          $(img).height(Math.min(_this.options.size, $(img).height()));

          // vertically align smaller images to bottom
          $(img).css('margin-top', maxHeight - $(img).outerHeight());

          $(item).height(maxHeight + $(item).find('.caption').outerHeight());
        });

        _this.to(_this.activeIndex);
      });
    },

    // Attach event handlers
    attachEvents: function() {
      var $img = this.$element.find('.item a > img'),
          $caption = this.$element.find('.caption'),
          _this = this;

      // pause slideshow on image mouseenter event
      $img.on('mouseenter', function() {  _this.pause(); });

      // play slideshow on image mouseleave event
      $img.on('mouseleave', function() {
        if (_this.options.autoPlay) _this.play();
      });

      // show full caption text (primary & secondary) on mouseenter
      $caption.on('mouseenter', function() {
        var $caption = $(this),
            $primary = $caption.find('.primary'),
            $secondary = $caption.find('.secondary');

        $primary.addClass('caption-hover');
        $secondary.addClass('caption-hover');

        if ($secondary.length > 0) {
          $primary.css('bottom', $secondary.height());
        }
      });

      // revert back to one-line caption text (primary & secondary) on mouseleave
      $caption.on('mouseleave', function() {
        var $caption = $(this),
            $primary = $caption.find('.primary'),
            $secondary = $caption.find('.secondary');

        $primary.removeClass('caption-hover').css('bottom', 0);
        $secondary.removeClass('caption-hover');
      });

      $(document).on('click', '[data-slide], [data-slide-to]', function(e) {
        pos = parseInt($(this).attr('data-slide-to'), 10) || $(this).attr('data-slide');

        _this.pause();
        _this.to(pos);
        e.preventDefault();
      });
    },

    // Destroy obsolete slideshow objects
    destroy: function() {
      this.pause();
      this.$element.removeData('slideshowBlock').unbind('slideshowBlock').remove();
    },

    // Check if element exists in DOM
    elementExistsInDom: function() {
      return $(document).find(this.$element).length !== 0 ? true : false;
    }
  }


  // Plugin default options
  slideshowBlock.DEFAULTS = {
    size: 350,
    autoPlay: true,
    interval: 5000 // in milliseconds
  }


  // Plugin definition
  $.fn.slideshowBlock = function(options) {
    return this.each(function() {
      var $this = $(this);
      var options = $.extend({}, slideshowBlock.DEFAULTS, $this.data(), typeof options == 'object' && options);

      $this.data('slideshowBlock', new slideshowBlock(this, options));
    })
  }

})(jQuery);


Spotlight.onLoad(function() {
  $('.slideshow-block').slideshowBlock();
});


Spotlight.onLoad(function() {
  if($('#solr_document_exhibit_tag_list').length > 0) {
    // By default tags input binds on page ready to [data-role=tagsinput],
    // however, that doesn't work with Turbolinks. So we init manually:
    $('#solr_document_exhibit_tag_list').tagsinput();

    var tags = new Bloodhound({
      datumTokenizer: function(d) { return Bloodhound.tokenizers.whitespace(d.name); },
      queryTokenizer: Bloodhound.tokenizers.whitespace,
      limit: 10,
      prefetch: {
        url: $('#solr_document_exhibit_tag_list').data('autocomplete_url'),
        ttl: 1,
        filter: function(list) {
          return $.map(list.tags, function(tag) { return { name: tag }; });
        }
      }
    });

    tags.initialize();

    $('#solr_document_exhibit_tag_list').tagsinput('input').typeahead({highlight: true, hint: false}, {
      name: 'tags',
      displayKey: 'name',
      source: tags.ttAdapter()
    }).bind('typeahead:selected', $.proxy(function (obj, datum) {
      $('#solr_document_exhibit_tag_list').tagsinput('add', datum.name);
      $('#solr_document_exhibit_tag_list').tagsinput('input').typeahead('val', '');
    })).bind('blur', function() {
      $('#solr_document_exhibit_tag_list').tagsinput('add', $('#solr_document_exhibit_tag_list').tagsinput('input').typeahead('val'));
      $('#solr_document_exhibit_tag_list').tagsinput('input').typeahead('val', '');
    });
  }

      $(".visiblity_toggle").bl_checkbox_submit({
          //css_class is added to elements added, plus used for id base
          css_class: "toggle_visibility",
          //success is called at the end of the ajax success callback
          success: function (public){
            // We store the selector of the label to toggle in a data attribute in the form
            var private_label = $($(this).data("label-toggle-target"));
            if ( public ) {
              private_label.slideUp();
            } else {
              private_label.slideDown();
            }
          }
      }); 

});
Spotlight.onLoad(function() {
  $("#another-email").on("click", function() {
    var container = $(this).closest('.form-group');
    var contacts = container.find('.contact');
    var input_container = contacts.first().clone();

    // wipe out any values from the inputs
    input_container.find('input').each(function() {
      $(this).val('');
      $(this).attr('id', $(this).attr('id').replace('0', contacts.length));
      $(this).attr('name', $(this).attr('name').replace('0', contacts.length));
    });

    input_container.find('.first-row-only').remove();

    // bootstrap does not render input-groups with only one value in them correctly.
    input_container.find('.input-group input:only-child').closest('.input-group').removeClass('input-group');

    $(input_container).insertAfter(contacts.last());
  });

  $('.btn-with-tooltip').tooltip();

  // Put focus in saved search title input when Save this search modal is shown
  $('#save-modal').on('shown.bs.modal', function () {
      $('#search_title').focus();
  })
});
Spotlight.onLoad(function() {
  serializeObservedForms(observedForms());
});
// All the observed forms
function observedForms(){
  return $('[data-form-observer]');
}
// Serialize all observed forms on the page
function serializeObservedForms(forms){
  forms.each(function(){
    serializeFormStatus($(this));
    unbindObservedFormSubmit();
  });
}
// Unbind observing form on submit (which we have to do because of turbolinks)
function unbindObservedFormSubmit(){
  observedForms().each(function(){
    $(this).on("submit", function(){
      $(this).data("being-submitted", true);
    });
  });
}
// Store form serialization in data attribute
function serializeFormStatus(form){
  form.data("serialized-form", formSerialization(form));
}
// Do custom serialization of the sir-trevor form data
function formSerialization(form){
  var content_editable = [];
  var i=0;
  $("[contenteditable='true']", form).each(function(){
    content_editable.push("&contenteditable_" + i + "=" + $(this).text());
  });
  return form.serialize() + content_editable.join();
}
// Get the stored serialized form status
function serializedFormStatus(form){
  return form.data("serialized-form");
}
// Check all observed forms on page for status change
function observedFormsStatusHasChanged(){
  var unsaved_changes = false;
  observedForms().each(function(){
    if ( !$(this).data("being-submitted") ) {
      if (serializedFormStatus($(this)) != formSerialization($(this))) {
        unsaved_changes = true;
      }
    }
  });
  return unsaved_changes;
}
// Compare stored and current form serializations
// to determine if the form has changed before
// unload and before any turbolinks change event
$(window).on('beforeunload page:before-change', function(event) {
  if ( observedFormsStatusHasChanged() ) {
    var message = "You have unsaved changes. Are you sure you want to leave this page?";
    if ( event.type == "beforeunload" ) {
      return message;
    }else{
      return confirm(message)
    }
  }
});
// Place all the behaviors and hooks related to the matching controller here.
// All this logic will automatically be available in application.js.
Spotlight.onLoad(function() {
  // Initialize Nestable for nested pages
  $('#nested-pages.about_pages_admin').nestable({maxDepth: 1});
  $('#nested-pages.feature_pages_admin').nestable({maxDepth: 2, expandBtnHTML: "", collapseBtnHTML: ""});
  $('#nested-pages.search_admin').nestable({maxDepth: 1});
  $('.contacts_admin').nestable({maxDepth: 1});
  // Handle weighting the pages and their children.
  updateWeightsAndRelationships($('#nested-pages'));
  updateWeightsAndRelationships($('.contacts_admin'));

});

Spotlight.onLoad(function(){

  SirTrevor.setDefaults({
    uploadUrl: $('[data-attachment-endpoint]').data('attachment-endpoint')
  });

  var instance = $('.sir-trevor-area').first();

  if (instance.length) {

    SirTrevor.EventBus.on('block:create:new', addTitleToSirTrevorBlock);
    SirTrevor.EventBus.on('block:create:existing', addTitleToSirTrevorBlock);

    SirTrevor.EventBus.on('block:create:new', checkBlockTypeLimitOnAdd);
    SirTrevor.EventBus.on('block:remove', checkGlobalBlockTypeLimit);

    var editor = new SirTrevor.Editor({
      el: instance,
      onEditorRender: function() {
        serializeObservedForms(observedForms());
      },
      blockTypeLimits: {
        "SearchResults": 1
      }
    });

    function checkBlockTypeLimitOnAdd(block) {
      var control = editor.$outer.find("a[data-type='" + block.blockCSSClass() + "']");

      control.toggleClass("disabled", !editor._canAddBlockType(block.class()));
    }

    function checkGlobalBlockTypeLimit() {
      // we don't know what type of block was created or removed.. So, try them all.

      $.each(editor.blockTypes, function(type) {
        var control = editor.$outer.find(".st-block-control[data-type='" + _.underscored(type) + "']");
        control.toggleClass("disabled", !editor._canAddBlockType(type));
      });
    }

    checkGlobalBlockTypeLimit();
  }
});


function addTitleToSirTrevorBlock(block){
  block.$inner.append("<div class='st-title'>" + block.title() + "</div>");
};

function updateWeightsAndRelationships(selector){
  $.each(selector, function() {
    $(this).on('change', function(event){
      // Scope to a container because we may have two orderable sections on the page (e.g. About page has pages and contacts)
      container = $(event.currentTarget);
      var data = $(this).nestable('serialize')
      var weight = 0;
      for(var i in data){
        var parent_id = data[i]['id'];
        parent_node = findNode(parent_id, container);
        setWeight(parent_node, weight++);
        if(data[i]['children']){
          var children = data[i]['children'];
          for(var child in children){
            var id = children[child]['id']
            child_node = findNode(id, container);
            setWeight(child_node, weight++);
            setParent(child_node, parent_id);
          }
        } else {
          setParent(parent_node, "");
        }
      }
    });
  });
}

function findNode(id, container) {
  return container.find("[data-id="+id+"]");
}

function setWeight(node, weight) {
  weight_field(node).val(weight);
}

function setParent(node, parent_id) {
  parent_page_field(node).val(parent_id);
}

/* find the input element with data-property="weight" that is nested under the given node */
function weight_field(node) {
  return find_property(node, "weight");
}

/* find the input element with data-property="parent_page" that is nested under the given node */
function parent_page_field(node){
  return find_property(node, "parent_page");
}

function find_property(node, property) {
  return node.find("input[data-property=" + property + "]");
 }
;
Spotlight.onLoad(function() {
  // Don't allow unchecking of checkboxes with the data-readonly attribute 
  $("input[type='checkbox'][data-readonly]").on("click", function(event) {
    event.preventDefault();
  });
});
(function( $ ){

  $.fn.reportProblem = function( options ) {
    // Create some defaults, extending them with any options that were provided
    var settings = $.extend( { }, options);
    var container, target, cancel;

    function init() {
      target_val = container.attr('data-target')
      if (!target_val) 
        return

      target = $("#" + target_val); 
      container.on('click', open);
      target.find('[data-behavior="cancel-link"]').on('click', close);
    }

    function open(event) {
      event.preventDefault();
      target.slideToggle('slow');
    }

    function close(event) {
      event.preventDefault();
      target.slideUp('fast');
    }

    return this.each(function() {        
      container = $(this);
      init();
    });
  }
})( jQuery );

Spotlight.onLoad(function() {
  $('[data-behavior="contact-link"]').reportProblem();
});


/*!
 * typeahead.js 0.10.2
 * https://github.com/twitter/typeahead.js
 * Copyright 2013-2014 Twitter, Inc. and other contributors; Licensed MIT
 */


!function(a){var b={isMsie:function(){return/(msie|trident)/i.test(navigator.userAgent)?navigator.userAgent.match(/(msie |rv:)(\d+(.\d+)?)/i)[2]:!1},isBlankString:function(a){return!a||/^\s*$/.test(a)},escapeRegExChars:function(a){return a.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g,"\\$&")},isString:function(a){return"string"==typeof a},isNumber:function(a){return"number"==typeof a},isArray:a.isArray,isFunction:a.isFunction,isObject:a.isPlainObject,isUndefined:function(a){return"undefined"==typeof a},bind:a.proxy,each:function(b,c){function d(a,b){return c(b,a)}a.each(b,d)},map:a.map,filter:a.grep,every:function(b,c){var d=!0;return b?(a.each(b,function(a,e){return(d=c.call(null,e,a,b))?void 0:!1}),!!d):d},some:function(b,c){var d=!1;return b?(a.each(b,function(a,e){return(d=c.call(null,e,a,b))?!1:void 0}),!!d):d},mixin:a.extend,getUniqueId:function(){var a=0;return function(){return a++}}(),templatify:function(b){function c(){return String(b)}return 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b=g[a.which||a.keyCode];this._managePreventDefault(b,a),b&&this._shouldTrigger(b,a)&&this.trigger(b+"Keyed",a)},_onInput:function(){this._checkInputValue()},_managePreventDefault:function(a,b){var c,d,e;switch(a){case"tab":d=this.getHint(),e=this.getInputValue(),c=d&&d!==e&&!f(b);break;case"up":case"down":c=!f(b);break;default:c=!1}c&&b.preventDefault()},_shouldTrigger:function(a,b){var c;switch(a){case"tab":c=!f(b);break;default:c=!0}return c},_checkInputValue:function(){var a,b,c;a=this.getInputValue(),b=e(a,this.query),c=b?this.query.length!==a.length:!1,b?c&&this.trigger("whitespaceChanged",this.query):this.trigger("queryChanged",this.query=a)},focus:function(){this.$input.focus()},blur:function(){this.$input.blur()},getQuery:function(){return this.query},setQuery:function(a){this.query=a},getInputValue:function(){return 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required"),this.isOpen=!1,this.isEmpty=!0,this.datasets=b.map(c.datasets,d),e=b.bind(this._onSuggestionClick,this),f=b.bind(this._onSuggestionMouseEnter,this),g=b.bind(this._onSuggestionMouseLeave,this),this.$menu=a(c.menu).on("click.tt",".tt-suggestion",e).on("mouseenter.tt",".tt-suggestion",f).on("mouseleave.tt",".tt-suggestion",g),b.each(this.datasets,function(a){h.$menu.append(a.getRoot()),a.onSync("rendered",h._onRendered,h)})}function d(a){return new p(a)}return b.mixin(c.prototype,m,{_onSuggestionClick:function(b){this.trigger("suggestionClicked",a(b.currentTarget))},_onSuggestionMouseEnter:function(b){this._removeCursor(),this._setCursor(a(b.currentTarget),!0)},_onSuggestionMouseLeave:function(){this._removeCursor()},_onRendered:function(){function a(a){return a.isEmpty()}this.isEmpty=b.every(this.datasets,a),this.isEmpty?this._hide():this.isOpen&&this._show(),this.trigger("datasetRendered")},_hide:function(){this.$menu.hide()},_show:function(){this.$menu.css("display","block")},_getSuggestions:function(){return this.$menu.find(".tt-suggestion")},_getCursor:function(){return this.$menu.find(".tt-cursor").first()},_setCursor:function(a,b){a.first().addClass("tt-cursor"),!b&&this.trigger("cursorMoved")},_removeCursor:function(){this._getCursor().removeClass("tt-cursor")},_moveCursor:function(a){var b,c,d,e;if(this.isOpen){if(c=this._getCursor(),b=this._getSuggestions(),this._removeCursor(),d=b.index(c)+a,d=(d+1)%(b.length+1)-1,-1===d)return void this.trigger("cursorRemoved");-1>d&&(d=b.length-1),this._setCursor(e=b.eq(d)),this._ensureVisible(e)}},_ensureVisible:function(a){var 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q({menu:e,datasets:c.datasets}).onSync("suggestionClicked",this._onSuggestionClicked,this).onSync("cursorMoved",this._onCursorMoved,this).onSync("cursorRemoved",this._onCursorRemoved,this).onSync("opened",this._onOpened,this).onSync("closed",this._onClosed,this).onAsync("datasetRendered",this._onDatasetRendered,this),this.input=new o({input:f,hint:g}).onSync("focused",this._onFocused,this).onSync("blurred",this._onBlurred,this).onSync("enterKeyed",this._onEnterKeyed,this).onSync("tabKeyed",this._onTabKeyed,this).onSync("escKeyed",this._onEscKeyed,this).onSync("upKeyed",this._onUpKeyed,this).onSync("downKeyed",this._onDownKeyed,this).onSync("leftKeyed",this._onLeftKeyed,this).onSync("rightKeyed",this._onRightKeyed,this).onSync("queryChanged",this._onQueryChanged,this).onSync("whitespaceChanged",this._onWhitespaceChanged,this),this._setLanguageDirection()}function d(b,c){var d,f,h,i;d=a(b),f=a(j.wrapper).css(k.wrapper),h=a(j.dropdown).css(k.dropdown),i=d.clone().css(k.hint).css(e(d)),i.val("").removeData().addClass("tt-hint").removeAttr("id name placeholder").prop("disabled",!0).attr({autocomplete:"off",spellcheck:"false"}),d.data(g,{dir:d.attr("dir"),autocomplete:d.attr("autocomplete"),spellcheck:d.attr("spellcheck"),style:d.attr("style")}),d.addClass("tt-input").attr({autocomplete:"off",spellcheck:!1}).css(c?k.input:k.inputWithNoHint);try{!d.attr("dir")&&d.attr("dir","auto")}catch(l){}return d.wrap(f).parent().prepend(c?i:null).append(h)}function e(a){return{backgroundAttachment:a.css("background-attachment"),backgroundClip:a.css("background-clip"),backgroundColor:a.css("background-color"),backgroundImage:a.css("background-image"),backgroundOrigin:a.css("background-origin"),backgroundPosition:a.css("background-position"),backgroundRepeat:a.css("background-repeat"),backgroundSize:a.css("background-size")}}function f(a){var c=a.find(".tt-input");b.each(c.data(g),function(a,d){b.isUndefined(a)?c.removeAttr(d):c.attr(d,a)}),c.detach().removeData(g).removeClass("tt-input").insertAfter(a),a.remove()}var g="ttAttrs";return b.mixin(c.prototype,{_onSuggestionClicked:function(a,b){var c;(c=this.dropdown.getDatumForSuggestion(b))&&this._select(c)},_onCursorMoved:function(){var a=this.dropdown.getDatumForCursor();this.input.setInputValue(a.value,!0),this.eventBus.trigger("cursorchanged",a.raw,a.datasetName)},_onCursorRemoved:function(){this.input.resetInputValue(),this._updateHint()},_onDatasetRendered:function(){this._updateHint()},_onOpened:function(){this._updateHint(),this.eventBus.trigger("opened")},_onClosed:function(){this.input.clearHint(),this.eventBus.trigger("closed")},_onFocused:function(){this.isActivated=!0,this.dropdown.open()},_onBlurred:function(){this.isActivated=!1,this.dropdown.empty(),this.dropdown.close()},_onEnterKeyed:function(a,b){var c,d;c=this.dropdown.getDatumForCursor(),d=this.dropdown.getDatumForTopSuggestion(),c?(this._select(c),b.preventDefault()):this.autoselect&&d&&(this._select(d),b.preventDefault())},_onTabKeyed:function(a,b){var c;(c=this.dropdown.getDatumForCursor())?(this._select(c),b.preventDefault()):this._autocomplete(!0)},_onEscKeyed:function(){this.dropdown.close(),this.input.resetInputValue()},_onUpKeyed:function(){var a=this.input.getQuery();this.dropdown.isEmpty&&a.length>=this.minLength?this.dropdown.update(a):this.dropdown.moveCursorUp(),this.dropdown.open()},_onDownKeyed:function(){var a=this.input.getQuery();this.dropdown.isEmpty&&a.length>=this.minLength?this.dropdown.update(a):this.dropdown.moveCursorDown(),this.dropdown.open()},_onLeftKeyed:function(){"rtl"===this.dir&&this._autocomplete()},_onRightKeyed:function(){"ltr"===this.dir&&this._autocomplete()},_onQueryChanged:function(a,b){this.input.clearHintIfInvalid(),b.length>=this.minLength?this.dropdown.update(b):this.dropdown.empty(),this.dropdown.open(),this._setLanguageDirection()},_onWhitespaceChanged:function(){this._updateHint(),this.dropdown.open()},_setLanguageDirection:function(){var a;this.dir!==(a=this.input.getLanguageDirection())&&(this.dir=a,this.$node.css("direction",a),this.dropdown.setLanguageDirection(a))},_updateHint:function(){var a,c,d,e,f,g;a=this.dropdown.getDatumForTopSuggestion(),a&&this.dropdown.isVisible()&&!this.input.hasOverflow()?(c=this.input.getInputValue(),d=o.normalizeQuery(c),e=b.escapeRegExChars(d),f=new RegExp("^(?:"+e+")(.+$)","i"),g=f.exec(a.value),g?this.input.setHint(c+g[1]):this.input.clearHint()):this.input.clearHint()},_autocomplete:function(a){var b,c,d,e;b=this.input.getHint(),c=this.input.getQuery(),d=a||this.input.isCursorAtEnd(),b&&c!==b&&d&&(e=this.dropdown.getDatumForTopSuggestion(),e&&this.input.setInputValue(e.value),this.eventBus.trigger("autocompleted",e.raw,e.datasetName))},_select:function(a){this.input.setQuery(a.value),this.input.setInputValue(a.value,!0),this._setLanguageDirection(),this.eventBus.trigger("selected",a.raw,a.datasetName),this.dropdown.close(),b.defer(b.bind(this.dropdown.empty,this.dropdown))},open:function(){this.dropdown.open()},close:function(){this.dropdown.close()},setVal:function(a){this.isActivated?this.input.setInputValue(a):(this.input.setQuery(a),this.input.setInputValue(a,!0)),this._setLanguageDirection()},getVal:function(){return this.input.getQuery()},destroy:function(){this.input.destroy(),this.dropdown.destroy(),f(this.$node),this.$node=null}}),c}();!function(){var c,d,e;c=a.fn.typeahead,d="ttTypeahead",e={initialize:function(c,e){function f(){var f,g,h=a(this);b.each(e,function(a){a.highlight=!!c.highlight}),g=new r({input:h,eventBus:f=new l({el:h}),withHint:b.isUndefined(c.hint)?!0:!!c.hint,minLength:c.minLength,autoselect:c.autoselect,datasets:e}),h.data(d,g)}return e=b.isArray(e)?e:[].slice.call(arguments,1),c=c||{},this.each(f)},open:function(){function b(){var b,c=a(this);(b=c.data(d))&&b.open()}return this.each(b)},close:function(){function b(){var b,c=a(this);(b=c.data(d))&&b.close()}return this.each(b)},val:function(b){function c(){var c,e=a(this);(c=e.data(d))&&c.setVal(b)}function e(a){var b,c;return(b=a.data(d))&&(c=b.getVal()),c}return arguments.length?this.each(c):e(this.first())},destroy:function(){function b(){var b,c=a(this);(b=c.data(d))&&(b.destroy(),c.removeData(d))}return this.each(b)}},a.fn.typeahead=function(a){return e[a]?e[a].apply(this,[].slice.call(arguments,1)):e.initialize.apply(this,arguments)},a.fn.typeahead.noConflict=function(){return a.fn.typeahead=c,this}}()}(window.jQuery);
/*!

 handlebars v1.3.0

Copyright (C) 2011 by Yehuda Katz

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

@license
*/
/* exported Handlebars */

var Handlebars = (function() {
// handlebars/safe-string.js
var __module4__ = (function() {
  "use strict";
  var __exports__;
  // Build out our basic SafeString type
  function SafeString(string) {
    this.string = string;
  }

  SafeString.prototype.toString = function() {
    return "" + this.string;
  };

  __exports__ = SafeString;
  return __exports__;
})();

// handlebars/utils.js
var __module3__ = (function(__dependency1__) {
  "use strict";
  var __exports__ = {};
  /*jshint -W004 */
  var SafeString = __dependency1__;

  var escape = {
    "&": "&amp;",
    "<": "&lt;",
    ">": "&gt;",
    '"': "&quot;",
    "'": "&#x27;",
    "`": "&#x60;"
  };

  var badChars = /[&<>"'`]/g;
  var possible = /[&<>"'`]/;

  function escapeChar(chr) {
    return escape[chr] || "&amp;";
  }

  function extend(obj, value) {
    for(var key in value) {
      if(Object.prototype.hasOwnProperty.call(value, key)) {
        obj[key] = value[key];
      }
    }
  }

  __exports__.extend = extend;var toString = Object.prototype.toString;
  __exports__.toString = toString;
  // Sourced from lodash
  // https://github.com/bestiejs/lodash/blob/master/LICENSE.txt
  var isFunction = function(value) {
    return typeof value === 'function';
  };
  // fallback for older versions of Chrome and Safari
  if (isFunction(/x/)) {
    isFunction = function(value) {
      return typeof value === 'function' && toString.call(value) === '[object Function]';
    };
  }
  var isFunction;
  __exports__.isFunction = isFunction;
  var isArray = Array.isArray || function(value) {
    return (value && typeof value === 'object') ? toString.call(value) === '[object Array]' : false;
  };
  __exports__.isArray = isArray;

  function escapeExpression(string) {
    // don't escape SafeStrings, since they're already safe
    if (string instanceof SafeString) {
      return string.toString();
    } else if (!string && string !== 0) {
      return "";
    }

    // Force a string conversion as this will be done by the append regardless and
    // the regex test will do this transparently behind the scenes, causing issues if
    // an object's to string has escaped characters in it.
    string = "" + string;

    if(!possible.test(string)) { return string; }
    return string.replace(badChars, escapeChar);
  }

  __exports__.escapeExpression = escapeExpression;function isEmpty(value) {
    if (!value && value !== 0) {
      return true;
    } else if (isArray(value) && value.length === 0) {
      return true;
    } else {
      return false;
    }
  }

  __exports__.isEmpty = isEmpty;
  return __exports__;
})(__module4__);

// handlebars/exception.js
var __module5__ = (function() {
  "use strict";
  var __exports__;

  var errorProps = ['description', 'fileName', 'lineNumber', 'message', 'name', 'number', 'stack'];

  function Exception(message, node) {
    var line;
    if (node && node.firstLine) {
      line = node.firstLine;

      message += ' - ' + line + ':' + node.firstColumn;
    }

    var tmp = Error.prototype.constructor.call(this, message);

    // Unfortunately errors are not enumerable in Chrome (at least), so `for prop in tmp` doesn't work.
    for (var idx = 0; idx < errorProps.length; idx++) {
      this[errorProps[idx]] = tmp[errorProps[idx]];
    }

    if (line) {
      this.lineNumber = line;
      this.column = node.firstColumn;
    }
  }

  Exception.prototype = new Error();

  __exports__ = Exception;
  return __exports__;
})();

// handlebars/base.js
var __module2__ = (function(__dependency1__, __dependency2__) {
  "use strict";
  var __exports__ = {};
  var Utils = __dependency1__;
  var Exception = __dependency2__;

  var VERSION = "1.3.0";
  __exports__.VERSION = VERSION;var COMPILER_REVISION = 4;
  __exports__.COMPILER_REVISION = COMPILER_REVISION;
  var REVISION_CHANGES = {
    1: '<= 1.0.rc.2', // 1.0.rc.2 is actually rev2 but doesn't report it
    2: '== 1.0.0-rc.3',
    3: '== 1.0.0-rc.4',
    4: '>= 1.0.0'
  };
  __exports__.REVISION_CHANGES = REVISION_CHANGES;
  var isArray = Utils.isArray,
      isFunction = Utils.isFunction,
      toString = Utils.toString,
      objectType = '[object Object]';

  function HandlebarsEnvironment(helpers, partials) {
    this.helpers = helpers || {};
    this.partials = partials || {};

    registerDefaultHelpers(this);
  }

  __exports__.HandlebarsEnvironment = HandlebarsEnvironment;HandlebarsEnvironment.prototype = {
    constructor: HandlebarsEnvironment,

    logger: logger,
    log: log,

    registerHelper: function(name, fn, inverse) {
      if (toString.call(name) === objectType) {
        if (inverse || fn) { throw new Exception('Arg not supported with multiple helpers'); }
        Utils.extend(this.helpers, name);
      } else {
        if (inverse) { fn.not = inverse; }
        this.helpers[name] = fn;
      }
    },

    registerPartial: function(name, str) {
      if (toString.call(name) === objectType) {
        Utils.extend(this.partials,  name);
      } else {
        this.partials[name] = str;
      }
    }
  };

  function registerDefaultHelpers(instance) {
    instance.registerHelper('helperMissing', function(arg) {
      if(arguments.length === 2) {
        return undefined;
      } else {
        throw new Exception("Missing helper: '" + arg + "'");
      }
    });

    instance.registerHelper('blockHelperMissing', function(context, options) {
      var inverse = options.inverse || function() {}, fn = options.fn;

      if (isFunction(context)) { context = context.call(this); }

      if(context === true) {
        return fn(this);
      } else if(context === false || context == null) {
        return inverse(this);
      } else if (isArray(context)) {
        if(context.length > 0) {
          return instance.helpers.each(context, options);
        } else {
          return inverse(this);
        }
      } else {
        return fn(context);
      }
    });

    instance.registerHelper('each', function(context, options) {
      var fn = options.fn, inverse = options.inverse;
      var i = 0, ret = "", data;

      if (isFunction(context)) { context = context.call(this); }

      if (options.data) {
        data = createFrame(options.data);
      }

      if(context && typeof context === 'object') {
        if (isArray(context)) {
          for(var j = context.length; i<j; i++) {
            if (data) {
              data.index = i;
              data.first = (i === 0);
              data.last  = (i === (context.length-1));
            }
            ret = ret + fn(context[i], { data: data });
          }
        } else {
          for(var key in context) {
            if(context.hasOwnProperty(key)) {
              if(data) { 
                data.key = key; 
                data.index = i;
                data.first = (i === 0);
              }
              ret = ret + fn(context[key], {data: data});
              i++;
            }
          }
        }
      }

      if(i === 0){
        ret = inverse(this);
      }

      return ret;
    });

    instance.registerHelper('if', function(conditional, options) {
      if (isFunction(conditional)) { conditional = conditional.call(this); }

      // Default behavior is to render the positive path if the value is truthy and not empty.
      // The `includeZero` option may be set to treat the condtional as purely not empty based on the
      // behavior of isEmpty. Effectively this determines if 0 is handled by the positive path or negative.
      if ((!options.hash.includeZero && !conditional) || Utils.isEmpty(conditional)) {
        return options.inverse(this);
      } else {
        return options.fn(this);
      }
    });

    instance.registerHelper('unless', function(conditional, options) {
      return instance.helpers['if'].call(this, conditional, {fn: options.inverse, inverse: options.fn, hash: options.hash});
    });

    instance.registerHelper('with', function(context, options) {
      if (isFunction(context)) { context = context.call(this); }

      if (!Utils.isEmpty(context)) return options.fn(context);
    });

    instance.registerHelper('log', function(context, options) {
      var level = options.data && options.data.level != null ? parseInt(options.data.level, 10) : 1;
      instance.log(level, context);
    });
  }

  var logger = {
    methodMap: { 0: 'debug', 1: 'info', 2: 'warn', 3: 'error' },

    // State enum
    DEBUG: 0,
    INFO: 1,
    WARN: 2,
    ERROR: 3,
    level: 3,

    // can be overridden in the host environment
    log: function(level, obj) {
      if (logger.level <= level) {
        var method = logger.methodMap[level];
        if (typeof console !== 'undefined' && console[method]) {
          console[method].call(console, obj);
        }
      }
    }
  };
  __exports__.logger = logger;
  function log(level, obj) { logger.log(level, obj); }

  __exports__.log = log;var createFrame = function(object) {
    var obj = {};
    Utils.extend(obj, object);
    return obj;
  };
  __exports__.createFrame = createFrame;
  return __exports__;
})(__module3__, __module5__);

// handlebars/runtime.js
var __module6__ = (function(__dependency1__, __dependency2__, __dependency3__) {
  "use strict";
  var __exports__ = {};
  var Utils = __dependency1__;
  var Exception = __dependency2__;
  var COMPILER_REVISION = __dependency3__.COMPILER_REVISION;
  var REVISION_CHANGES = __dependency3__.REVISION_CHANGES;

  function checkRevision(compilerInfo) {
    var compilerRevision = compilerInfo && compilerInfo[0] || 1,
        currentRevision = COMPILER_REVISION;

    if (compilerRevision !== currentRevision) {
      if (compilerRevision < currentRevision) {
        var runtimeVersions = REVISION_CHANGES[currentRevision],
            compilerVersions = REVISION_CHANGES[compilerRevision];
        throw new Exception("Template was precompiled with an older version of Handlebars than the current runtime. "+
              "Please update your precompiler to a newer version ("+runtimeVersions+") or downgrade your runtime to an older version ("+compilerVersions+").");
      } else {
        // Use the embedded version info since the runtime doesn't know about this revision yet
        throw new Exception("Template was precompiled with a newer version of Handlebars than the current runtime. "+
              "Please update your runtime to a newer version ("+compilerInfo[1]+").");
      }
    }
  }

  __exports__.checkRevision = checkRevision;// TODO: Remove this line and break up compilePartial

  function template(templateSpec, env) {
    if (!env) {
      throw new Exception("No environment passed to template");
    }

    // Note: Using env.VM references rather than local var references throughout this section to allow
    // for external users to override these as psuedo-supported APIs.
    var invokePartialWrapper = function(partial, name, context, helpers, partials, data) {
      var result = env.VM.invokePartial.apply(this, arguments);
      if (result != null) { return result; }

      if (env.compile) {
        var options = { helpers: helpers, partials: partials, data: data };
        partials[name] = env.compile(partial, { data: data !== undefined }, env);
        return partials[name](context, options);
      } else {
        throw new Exception("The partial " + name + " could not be compiled when running in runtime-only mode");
      }
    };

    // Just add water
    var container = {
      escapeExpression: Utils.escapeExpression,
      invokePartial: invokePartialWrapper,
      programs: [],
      program: function(i, fn, data) {
        var programWrapper = this.programs[i];
        if(data) {
          programWrapper = program(i, fn, data);
        } else if (!programWrapper) {
          programWrapper = this.programs[i] = program(i, fn);
        }
        return programWrapper;
      },
      merge: function(param, common) {
        var ret = param || common;

        if (param && common && (param !== common)) {
          ret = {};
          Utils.extend(ret, common);
          Utils.extend(ret, param);
        }
        return ret;
      },
      programWithDepth: env.VM.programWithDepth,
      noop: env.VM.noop,
      compilerInfo: null
    };

    return function(context, options) {
      options = options || {};
      var namespace = options.partial ? options : env,
          helpers,
          partials;

      if (!options.partial) {
        helpers = options.helpers;
        partials = options.partials;
      }
      var result = templateSpec.call(
            container,
            namespace, context,
            helpers,
            partials,
            options.data);

      if (!options.partial) {
        env.VM.checkRevision(container.compilerInfo);
      }

      return result;
    };
  }

  __exports__.template = template;function programWithDepth(i, fn, data /*, $depth */) {
    var args = Array.prototype.slice.call(arguments, 3);

    var prog = function(context, options) {
      options = options || {};

      return fn.apply(this, [context, options.data || data].concat(args));
    };
    prog.program = i;
    prog.depth = args.length;
    return prog;
  }

  __exports__.programWithDepth = programWithDepth;function program(i, fn, data) {
    var prog = function(context, options) {
      options = options || {};

      return fn(context, options.data || data);
    };
    prog.program = i;
    prog.depth = 0;
    return prog;
  }

  __exports__.program = program;function invokePartial(partial, name, context, helpers, partials, data) {
    var options = { partial: true, helpers: helpers, partials: partials, data: data };

    if(partial === undefined) {
      throw new Exception("The partial " + name + " could not be found");
    } else if(partial instanceof Function) {
      return partial(context, options);
    }
  }

  __exports__.invokePartial = invokePartial;function noop() { return ""; }

  __exports__.noop = noop;
  return __exports__;
})(__module3__, __module5__, __module2__);

// handlebars.runtime.js
var __module1__ = (function(__dependency1__, __dependency2__, __dependency3__, __dependency4__, __dependency5__) {
  "use strict";
  var __exports__;
  /*globals Handlebars: true */
  var base = __dependency1__;

  // Each of these augment the Handlebars object. No need to setup here.
  // (This is done to easily share code between commonjs and browse envs)
  var SafeString = __dependency2__;
  var Exception = __dependency3__;
  var Utils = __dependency4__;
  var runtime = __dependency5__;

  // For compatibility and usage outside of module systems, make the Handlebars object a namespace
  var create = function() {
    var hb = new base.HandlebarsEnvironment();

    Utils.extend(hb, base);
    hb.SafeString = SafeString;
    hb.Exception = Exception;
    hb.Utils = Utils;

    hb.VM = runtime;
    hb.template = function(spec) {
      return runtime.template(spec, hb);
    };

    return hb;
  };

  var Handlebars = create();
  Handlebars.create = create;

  __exports__ = Handlebars;
  return __exports__;
})(__module2__, __module4__, __module5__, __module3__, __module6__);

// handlebars/compiler/ast.js
var __module7__ = (function(__dependency1__) {
  "use strict";
  var __exports__;
  var Exception = __dependency1__;

  function LocationInfo(locInfo){
    locInfo = locInfo || {};
    this.firstLine   = locInfo.first_line;
    this.firstColumn = locInfo.first_column;
    this.lastColumn  = locInfo.last_column;
    this.lastLine    = locInfo.last_line;
  }

  var AST = {
    ProgramNode: function(statements, inverseStrip, inverse, locInfo) {
      var inverseLocationInfo, firstInverseNode;
      if (arguments.length === 3) {
        locInfo = inverse;
        inverse = null;
      } else if (arguments.length === 2) {
        locInfo = inverseStrip;
        inverseStrip = null;
      }

      LocationInfo.call(this, locInfo);
      this.type = "program";
      this.statements = statements;
      this.strip = {};

      if(inverse) {
        firstInverseNode = inverse[0];
        if (firstInverseNode) {
          inverseLocationInfo = {
            first_line: firstInverseNode.firstLine,
            last_line: firstInverseNode.lastLine,
            last_column: firstInverseNode.lastColumn,
            first_column: firstInverseNode.firstColumn
          };
          this.inverse = new AST.ProgramNode(inverse, inverseStrip, inverseLocationInfo);
        } else {
          this.inverse = new AST.ProgramNode(inverse, inverseStrip);
        }
        this.strip.right = inverseStrip.left;
      } else if (inverseStrip) {
        this.strip.left = inverseStrip.right;
      }
    },

    MustacheNode: function(rawParams, hash, open, strip, locInfo) {
      LocationInfo.call(this, locInfo);
      this.type = "mustache";
      this.strip = strip;

      // Open may be a string parsed from the parser or a passed boolean flag
      if (open != null && open.charAt) {
        // Must use charAt to support IE pre-10
        var escapeFlag = open.charAt(3) || open.charAt(2);
        this.escaped = escapeFlag !== '{' && escapeFlag !== '&';
      } else {
        this.escaped = !!open;
      }

      if (rawParams instanceof AST.SexprNode) {
        this.sexpr = rawParams;
      } else {
        // Support old AST API
        this.sexpr = new AST.SexprNode(rawParams, hash);
      }

      this.sexpr.isRoot = true;

      // Support old AST API that stored this info in MustacheNode
      this.id = this.sexpr.id;
      this.params = this.sexpr.params;
      this.hash = this.sexpr.hash;
      this.eligibleHelper = this.sexpr.eligibleHelper;
      this.isHelper = this.sexpr.isHelper;
    },

    SexprNode: function(rawParams, hash, locInfo) {
      LocationInfo.call(this, locInfo);

      this.type = "sexpr";
      this.hash = hash;

      var id = this.id = rawParams[0];
      var params = this.params = rawParams.slice(1);

      // a mustache is an eligible helper if:
      // * its id is simple (a single part, not `this` or `..`)
      var eligibleHelper = this.eligibleHelper = id.isSimple;

      // a mustache is definitely a helper if:
      // * it is an eligible helper, and
      // * it has at least one parameter or hash segment
      this.isHelper = eligibleHelper && (params.length || hash);

      // if a mustache is an eligible helper but not a definite
      // helper, it is ambiguous, and will be resolved in a later
      // pass or at runtime.
    },

    PartialNode: function(partialName, context, strip, locInfo) {
      LocationInfo.call(this, locInfo);
      this.type         = "partial";
      this.partialName  = partialName;
      this.context      = context;
      this.strip = strip;
    },

    BlockNode: function(mustache, program, inverse, close, locInfo) {
      LocationInfo.call(this, locInfo);

      if(mustache.sexpr.id.original !== close.path.original) {
        throw new Exception(mustache.sexpr.id.original + " doesn't match " + close.path.original, this);
      }

      this.type = 'block';
      this.mustache = mustache;
      this.program  = program;
      this.inverse  = inverse;

      this.strip = {
        left: mustache.strip.left,
        right: close.strip.right
      };

      (program || inverse).strip.left = mustache.strip.right;
      (inverse || program).strip.right = close.strip.left;

      if (inverse && !program) {
        this.isInverse = true;
      }
    },

    ContentNode: function(string, locInfo) {
      LocationInfo.call(this, locInfo);
      this.type = "content";
      this.string = string;
    },

    HashNode: function(pairs, locInfo) {
      LocationInfo.call(this, locInfo);
      this.type = "hash";
      this.pairs = pairs;
    },

    IdNode: function(parts, locInfo) {
      LocationInfo.call(this, locInfo);
      this.type = "ID";

      var original = "",
          dig = [],
          depth = 0;

      for(var i=0,l=parts.length; i<l; i++) {
        var part = parts[i].part;
        original += (parts[i].separator || '') + part;

        if (part === ".." || part === "." || part === "this") {
          if (dig.length > 0) {
            throw new Exception("Invalid path: " + original, this);
          } else if (part === "..") {
            depth++;
          } else {
            this.isScoped = true;
          }
        } else {
          dig.push(part);
        }
      }

      this.original = original;
      this.parts    = dig;
      this.string   = dig.join('.');
      this.depth    = depth;

      // an ID is simple if it only has one part, and that part is not
      // `..` or `this`.
      this.isSimple = parts.length === 1 && !this.isScoped && depth === 0;

      this.stringModeValue = this.string;
    },

    PartialNameNode: function(name, locInfo) {
      LocationInfo.call(this, locInfo);
      this.type = "PARTIAL_NAME";
      this.name = name.original;
    },

    DataNode: function(id, locInfo) {
      LocationInfo.call(this, locInfo);
      this.type = "DATA";
      this.id = id;
    },

    StringNode: function(string, locInfo) {
      LocationInfo.call(this, locInfo);
      this.type = "STRING";
      this.original =
        this.string =
        this.stringModeValue = string;
    },

    IntegerNode: function(integer, locInfo) {
      LocationInfo.call(this, locInfo);
      this.type = "INTEGER";
      this.original =
        this.integer = integer;
      this.stringModeValue = Number(integer);
    },

    BooleanNode: function(bool, locInfo) {
      LocationInfo.call(this, locInfo);
      this.type = "BOOLEAN";
      this.bool = bool;
      this.stringModeValue = bool === "true";
    },

    CommentNode: function(comment, locInfo) {
      LocationInfo.call(this, locInfo);
      this.type = "comment";
      this.comment = comment;
    }
  };

  // Must be exported as an object rather than the root of the module as the jison lexer
  // most modify the object to operate properly.
  __exports__ = AST;
  return __exports__;
})(__module5__);

// handlebars/compiler/parser.js
var __module9__ = (function() {
  "use strict";
  var __exports__;
  /* jshint ignore:start */
  /* Jison generated parser */
  var handlebars = (function(){
  var parser = {trace: function trace() { },
  yy: {},
  symbols_: {"error":2,"root":3,"statements":4,"EOF":5,"program":6,"simpleInverse":7,"statement":8,"openInverse":9,"closeBlock":10,"openBlock":11,"mustache":12,"partial":13,"CONTENT":14,"COMMENT":15,"OPEN_BLOCK":16,"sexpr":17,"CLOSE":18,"OPEN_INVERSE":19,"OPEN_ENDBLOCK":20,"path":21,"OPEN":22,"OPEN_UNESCAPED":23,"CLOSE_UNESCAPED":24,"OPEN_PARTIAL":25,"partialName":26,"partial_option0":27,"sexpr_repetition0":28,"sexpr_option0":29,"dataName":30,"param":31,"STRING":32,"INTEGER":33,"BOOLEAN":34,"OPEN_SEXPR":35,"CLOSE_SEXPR":36,"hash":37,"hash_repetition_plus0":38,"hashSegment":39,"ID":40,"EQUALS":41,"DATA":42,"pathSegments":43,"SEP":44,"$accept":0,"$end":1},
  terminals_: {2:"error",5:"EOF",14:"CONTENT",15:"COMMENT",16:"OPEN_BLOCK",18:"CLOSE",19:"OPEN_INVERSE",20:"OPEN_ENDBLOCK",22:"OPEN",23:"OPEN_UNESCAPED",24:"CLOSE_UNESCAPED",25:"OPEN_PARTIAL",32:"STRING",33:"INTEGER",34:"BOOLEAN",35:"OPEN_SEXPR",36:"CLOSE_SEXPR",40:"ID",41:"EQUALS",42:"DATA",44:"SEP"},
  productions_: [0,[3,2],[3,1],[6,2],[6,3],[6,2],[6,1],[6,1],[6,0],[4,1],[4,2],[8,3],[8,3],[8,1],[8,1],[8,1],[8,1],[11,3],[9,3],[10,3],[12,3],[12,3],[13,4],[7,2],[17,3],[17,1],[31,1],[31,1],[31,1],[31,1],[31,1],[31,3],[37,1],[39,3],[26,1],[26,1],[26,1],[30,2],[21,1],[43,3],[43,1],[27,0],[27,1],[28,0],[28,2],[29,0],[29,1],[38,1],[38,2]],
  performAction: function anonymous(yytext,yyleng,yylineno,yy,yystate,$$,_$) {

  var $0 = $$.length - 1;
  switch (yystate) {
  case 1: return new yy.ProgramNode($$[$0-1], this._$); 
  break;
  case 2: return new yy.ProgramNode([], this._$); 
  break;
  case 3:this.$ = new yy.ProgramNode([], $$[$0-1], $$[$0], this._$);
  break;
  case 4:this.$ = new yy.ProgramNode($$[$0-2], $$[$0-1], $$[$0], this._$);
  break;
  case 5:this.$ = new yy.ProgramNode($$[$0-1], $$[$0], [], this._$);
  break;
  case 6:this.$ = new yy.ProgramNode($$[$0], this._$);
  break;
  case 7:this.$ = new yy.ProgramNode([], this._$);
  break;
  case 8:this.$ = new yy.ProgramNode([], this._$);
  break;
  case 9:this.$ = [$$[$0]];
  break;
  case 10: $$[$0-1].push($$[$0]); this.$ = $$[$0-1]; 
  break;
  case 11:this.$ = new yy.BlockNode($$[$0-2], $$[$0-1].inverse, $$[$0-1], $$[$0], this._$);
  break;
  case 12:this.$ = new yy.BlockNode($$[$0-2], $$[$0-1], $$[$0-1].inverse, $$[$0], this._$);
  break;
  case 13:this.$ = $$[$0];
  break;
  case 14:this.$ = $$[$0];
  break;
  case 15:this.$ = new yy.ContentNode($$[$0], this._$);
  break;
  case 16:this.$ = new yy.CommentNode($$[$0], this._$);
  break;
  case 17:this.$ = new yy.MustacheNode($$[$0-1], null, $$[$0-2], stripFlags($$[$0-2], $$[$0]), this._$);
  break;
  case 18:this.$ = new yy.MustacheNode($$[$0-1], null, $$[$0-2], stripFlags($$[$0-2], $$[$0]), this._$);
  break;
  case 19:this.$ = {path: $$[$0-1], strip: stripFlags($$[$0-2], $$[$0])};
  break;
  case 20:this.$ = new yy.MustacheNode($$[$0-1], null, $$[$0-2], stripFlags($$[$0-2], $$[$0]), this._$);
  break;
  case 21:this.$ = new yy.MustacheNode($$[$0-1], null, $$[$0-2], stripFlags($$[$0-2], $$[$0]), this._$);
  break;
  case 22:this.$ = new yy.PartialNode($$[$0-2], $$[$0-1], stripFlags($$[$0-3], $$[$0]), this._$);
  break;
  case 23:this.$ = stripFlags($$[$0-1], $$[$0]);
  break;
  case 24:this.$ = new yy.SexprNode([$$[$0-2]].concat($$[$0-1]), $$[$0], this._$);
  break;
  case 25:this.$ = new yy.SexprNode([$$[$0]], null, this._$);
  break;
  case 26:this.$ = $$[$0];
  break;
  case 27:this.$ = new yy.StringNode($$[$0], this._$);
  break;
  case 28:this.$ = new yy.IntegerNode($$[$0], this._$);
  break;
  case 29:this.$ = new yy.BooleanNode($$[$0], this._$);
  break;
  case 30:this.$ = $$[$0];
  break;
  case 31:$$[$0-1].isHelper = true; this.$ = $$[$0-1];
  break;
  case 32:this.$ = new yy.HashNode($$[$0], this._$);
  break;
  case 33:this.$ = [$$[$0-2], $$[$0]];
  break;
  case 34:this.$ = new yy.PartialNameNode($$[$0], this._$);
  break;
  case 35:this.$ = new yy.PartialNameNode(new yy.StringNode($$[$0], this._$), this._$);
  break;
  case 36:this.$ = new yy.PartialNameNode(new yy.IntegerNode($$[$0], this._$));
  break;
  case 37:this.$ = new yy.DataNode($$[$0], this._$);
  break;
  case 38:this.$ = new yy.IdNode($$[$0], this._$);
  break;
  case 39: $$[$0-2].push({part: $$[$0], separator: $$[$0-1]}); this.$ = $$[$0-2]; 
  break;
  case 40:this.$ = [{part: $$[$0]}];
  break;
  case 43:this.$ = [];
  break;
  case 44:$$[$0-1].push($$[$0]);
  break;
  case 47:this.$ = [$$[$0]];
  break;
  case 48:$$[$0-1].push($$[$0]);
  break;
  }
  },
  table: [{3:1,4:2,5:[1,3],8:4,9:5,11:6,12:7,13:8,14:[1,9],15:[1,10],16:[1,12],19:[1,11],22:[1,13],23:[1,14],25:[1,15]},{1:[3]},{5:[1,16],8:17,9:5,11:6,12:7,13:8,14:[1,9],15:[1,10],16:[1,12],19:[1,11],22:[1,13],23:[1,14],25:[1,15]},{1:[2,2]},{5:[2,9],14:[2,9],15:[2,9],16:[2,9],19:[2,9],20:[2,9],22:[2,9],23:[2,9],25:[2,9]},{4:20,6:18,7:19,8:4,9:5,11:6,12:7,13:8,14:[1,9],15:[1,10],16:[1,12],19:[1,21],20:[2,8],22:[1,13],23:[1,14],25:[1,15]},{4:20,6:22,7:19,8:4,9:5,11:6,12:7,13:8,14:[1,9],15:[1,10],16:[1,12],19:[1,21],20:[2,8],22:[1,13],23:[1,14],25:[1,15]},{5:[2,13],14:[2,13],15:[2,13],16:[2,13],19:[2,13],20:[2,13],22:[2,13],23:[2,13],25:[2,13]},{5:[2,14],14:[2,14],15:[2,14],16:[2,14],19:[2,14],20:[2,14],22:[2,14],23:[2,14],25:[2,14]},{5:[2,15],14:[2,15],15:[2,15],16:[2,15],19:[2,15],20:[2,15],22:[2,15],23:[2,15],25:[2,15]},{5:[2,16],14:[2,16],15:[2,16],16:[2,16],19:[2,16],20:[2,16],22:[2,16],23:[2,16],25:[2,16]},{17:23,21:24,30:25,40:[1,28],42:[1,27],43:26},{17:29,21:24,30:25,40:[1,28],42:[1,27],43:26},{17:30,21:24,30:25,40:[1,28],42:[1,27],43:26},{17:31,21:24,30:25,40:[1,28],42:[1,27],43:26},{21:33,26:32,32:[1,34],33:[1,35],40:[1,28],43:26},{1:[2,1]},{5:[2,10],14:[2,10],15:[2,10],16:[2,10],19:[2,10],20:[2,10],22:[2,10],23:[2,10],25:[2,10]},{10:36,20:[1,37]},{4:38,8:4,9:5,11:6,12:7,13:8,14:[1,9],15:[1,10],16:[1,12],19:[1,11],20:[2,7],22:[1,13],23:[1,14],25:[1,15]},{7:39,8:17,9:5,11:6,12:7,13:8,14:[1,9],15:[1,10],16:[1,12],19:[1,21],20:[2,6],22:[1,13],23:[1,14],25:[1,15]},{17:23,18:[1,40],21:24,30:25,40:[1,28],42:[1,27],43:26},{10:41,20:[1,37]},{18:[1,42]},{18:[2,43],24:[2,43],28:43,32:[2,43],33:[2,43],34:[2,43],35:[2,43],36:[2,43],40:[2,43],42:[2,43]},{18:[2,25],24:[2,25],36:[2,25]},{18:[2,38],24:[2,38],32:[2,38],33:[2,38],34:[2,38],35:[2,38],36:[2,38],40:[2,38],42:[2,38],44:[1,44]},{21:45,40:[1,28],43:26},{18:[2,40],24:[2,40],32:[2,40],33:[2,40],34:[2,40],35:[2,40],36:[2,40],40:[2,40],42:[2,40],44:[2,40]},{18:[1,46]},{18:[1,47]},{24:[1,48]},{18:[2,41],21:50,27:49,40:[1,28],43:26},{18:[2,34],40:[2,34]},{18:[2,35],40:[2,35]},{18:[2,36],40:[2,36]},{5:[2,11],14:[2,11],15:[2,11],16:[2,11],19:[2,11],20:[2,11],22:[2,11],23:[2,11],25:[2,11]},{21:51,40:[1,28],43:26},{8:17,9:5,11:6,12:7,13:8,14:[1,9],15:[1,10],16:[1,12],19:[1,11],20:[2,3],22:[1,13],23:[1,14],25:[1,15]},{4:52,8:4,9:5,11:6,12:7,13:8,14:[1,9],15:[1,10],16:[1,12],19:[1,11],20:[2,5],22:[1,13],23:[1,14],25:[1,15]},{14:[2,23],15:[2,23],16:[2,23],19:[2,23],20:[2,23],22:[2,23],23:[2,23],25:[2,23]},{5:[2,12],14:[2,12],15:[2,12],16:[2,12],19:[2,12],20:[2,12],22:[2,12],23:[2,12],25:[2,12]},{14:[2,18],15:[2,18],16:[2,18],19:[2,18],20:[2,18],22:[2,18],23:[2,18],25:[2,18]},{18:[2,45],21:56,24:[2,45],29:53,30:60,31:54,32:[1,57],33:[1,58],34:[1,59],35:[1,61],36:[2,45],37:55,38:62,39:63,40:[1,64],42:[1,27],43:26},{40:[1,65]},{18:[2,37],24:[2,37],32:[2,37],33:[2,37],34:[2,37],35:[2,37],36:[2,37],40:[2,37],42:[2,37]},{14:[2,17],15:[2,17],16:[2,17],19:[2,17],20:[2,17],22:[2,17],23:[2,17],25:[2,17]},{5:[2,20],14:[2,20],15:[2,20],16:[2,20],19:[2,20],20:[2,20],22:[2,20],23:[2,20],25:[2,20]},{5:[2,21],14:[2,21],15:[2,21],16:[2,21],19:[2,21],20:[2,21],22:[2,21],23:[2,21],25:[2,21]},{18:[1,66]},{18:[2,42]},{18:[1,67]},{8:17,9:5,11:6,12:7,13:8,14:[1,9],15:[1,10],16:[1,12],19:[1,11],20:[2,4],22:[1,13],23:[1,14],25:[1,15]},{18:[2,24],24:[2,24],36:[2,24]},{18:[2,44],24:[2,44],32:[2,44],33:[2,44],34:[2,44],35:[2,44],36:[2,44],40:[2,44],42:[2,44]},{18:[2,46],24:[2,46],36:[2,46]},{18:[2,26],24:[2,26],32:[2,26],33:[2,26],34:[2,26],35:[2,26],36:[2,26],40:[2,26],42:[2,26]},{18:[2,27],24:[2,27],32:[2,27],33:[2,27],34:[2,27],35:[2,27],36:[2,27],40:[2,27],42:[2,27]},{18:[2,28],24:[2,28],32:[2,28],33:[2,28],34:[2,28],35:[2,28],36:[2,28],40:[2,28],42:[2,28]},{18:[2,29],24:[2,29],32:[2,29],33:[2,29],34:[2,29],35:[2,29],36:[2,29],40:[2,29],42:[2,29]},{18:[2,30],24:[2,30],32:[2,30],33:[2,30],34:[2,30],35:[2,30],36:[2,30],40:[2,30],42:[2,30]},{17:68,21:24,30:25,40:[1,28],42:[1,27],43:26},{18:[2,32],24:[2,32],36:[2,32],39:69,40:[1,70]},{18:[2,47],24:[2,47],36:[2,47],40:[2,47]},{18:[2,40],24:[2,40],32:[2,40],33:[2,40],34:[2,40],35:[2,40],36:[2,40],40:[2,40],41:[1,71],42:[2,40],44:[2,40]},{18:[2,39],24:[2,39],32:[2,39],33:[2,39],34:[2,39],35:[2,39],36:[2,39],40:[2,39],42:[2,39],44:[2,39]},{5:[2,22],14:[2,22],15:[2,22],16:[2,22],19:[2,22],20:[2,22],22:[2,22],23:[2,22],25:[2,22]},{5:[2,19],14:[2,19],15:[2,19],16:[2,19],19:[2,19],20:[2,19],22:[2,19],23:[2,19],25:[2,19]},{36:[1,72]},{18:[2,48],24:[2,48],36:[2,48],40:[2,48]},{41:[1,71]},{21:56,30:60,31:73,32:[1,57],33:[1,58],34:[1,59],35:[1,61],40:[1,28],42:[1,27],43:26},{18:[2,31],24:[2,31],32:[2,31],33:[2,31],34:[2,31],35:[2,31],36:[2,31],40:[2,31],42:[2,31]},{18:[2,33],24:[2,33],36:[2,33],40:[2,33]}],
  defaultActions: {3:[2,2],16:[2,1],50:[2,42]},
  parseError: function parseError(str, hash) {
      throw new Error(str);
  },
  parse: function parse(input) {
      var self = this, stack = [0], vstack = [null], lstack = [], table = this.table, yytext = "", yylineno = 0, yyleng = 0, recovering = 0, TERROR = 2, EOF = 1;
      this.lexer.setInput(input);
      this.lexer.yy = this.yy;
      this.yy.lexer = this.lexer;
      this.yy.parser = this;
      if (typeof this.lexer.yylloc == "undefined")
          this.lexer.yylloc = {};
      var yyloc = this.lexer.yylloc;
      lstack.push(yyloc);
      var ranges = this.lexer.options && this.lexer.options.ranges;
      if (typeof this.yy.parseError === "function")
          this.parseError = this.yy.parseError;
      function popStack(n) {
          stack.length = stack.length - 2 * n;
          vstack.length = vstack.length - n;
          lstack.length = lstack.length - n;
      }
      function lex() {
          var token;
          token = self.lexer.lex() || 1;
          if (typeof token !== "number") {
              token = self.symbols_[token] || token;
          }
          return token;
      }
      var symbol, preErrorSymbol, state, action, a, r, yyval = {}, p, len, newState, expected;
      while (true) {
          state = stack[stack.length - 1];
          if (this.defaultActions[state]) {
              action = this.defaultActions[state];
          } else {
              if (symbol === null || typeof symbol == "undefined") {
                  symbol = lex();
              }
              action = table[state] && table[state][symbol];
          }
          if (typeof action === "undefined" || !action.length || !action[0]) {
              var errStr = "";
              if (!recovering) {
                  expected = [];
                  for (p in table[state])
                      if (this.terminals_[p] && p > 2) {
                          expected.push("'" + this.terminals_[p] + "'");
                      }
                  if (this.lexer.showPosition) {
                      errStr = "Parse error on line " + (yylineno + 1) + ":\n" + this.lexer.showPosition() + "\nExpecting " + expected.join(", ") + ", got '" + (this.terminals_[symbol] || symbol) + "'";
                  } else {
                      errStr = "Parse error on line " + (yylineno + 1) + ": Unexpected " + (symbol == 1?"end of input":"'" + (this.terminals_[symbol] || symbol) + "'");
                  }
                  this.parseError(errStr, {text: this.lexer.match, token: this.terminals_[symbol] || symbol, line: this.lexer.yylineno, loc: yyloc, expected: expected});
              }
          }
          if (action[0] instanceof Array && action.length > 1) {
              throw new Error("Parse Error: multiple actions possible at state: " + state + ", token: " + symbol);
          }
          switch (action[0]) {
          case 1:
              stack.push(symbol);
              vstack.push(this.lexer.yytext);
              lstack.push(this.lexer.yylloc);
              stack.push(action[1]);
              symbol = null;
              if (!preErrorSymbol) {
                  yyleng = this.lexer.yyleng;
                  yytext = this.lexer.yytext;
                  yylineno = this.lexer.yylineno;
                  yyloc = this.lexer.yylloc;
                  if (recovering > 0)
                      recovering--;
              } else {
                  symbol = preErrorSymbol;
                  preErrorSymbol = null;
              }
              break;
          case 2:
              len = this.productions_[action[1]][1];
              yyval.$ = vstack[vstack.length - len];
              yyval._$ = {first_line: lstack[lstack.length - (len || 1)].first_line, last_line: lstack[lstack.length - 1].last_line, first_column: lstack[lstack.length - (len || 1)].first_column, last_column: lstack[lstack.length - 1].last_column};
              if (ranges) {
                  yyval._$.range = [lstack[lstack.length - (len || 1)].range[0], lstack[lstack.length - 1].range[1]];
              }
              r = this.performAction.call(yyval, yytext, yyleng, yylineno, this.yy, action[1], vstack, lstack);
              if (typeof r !== "undefined") {
                  return r;
              }
              if (len) {
                  stack = stack.slice(0, -1 * len * 2);
                  vstack = vstack.slice(0, -1 * len);
                  lstack = lstack.slice(0, -1 * len);
              }
              stack.push(this.productions_[action[1]][0]);
              vstack.push(yyval.$);
              lstack.push(yyval._$);
              newState = table[stack[stack.length - 2]][stack[stack.length - 1]];
              stack.push(newState);
              break;
          case 3:
              return true;
          }
      }
      return true;
  }
  };


  function stripFlags(open, close) {
    return {
      left: open.charAt(2) === '~',
      right: close.charAt(0) === '~' || close.charAt(1) === '~'
    };
  }

  /* Jison generated lexer */
  var lexer = (function(){
  var lexer = ({EOF:1,
  parseError:function parseError(str, hash) {
          if (this.yy.parser) {
              this.yy.parser.parseError(str, hash);
          } else {
              throw new Error(str);
          }
      },
  setInput:function (input) {
          this._input = input;
          this._more = this._less = this.done = false;
          this.yylineno = this.yyleng = 0;
          this.yytext = this.matched = this.match = '';
          this.conditionStack = ['INITIAL'];
          this.yylloc = {first_line:1,first_column:0,last_line:1,last_column:0};
          if (this.options.ranges) this.yylloc.range = [0,0];
          this.offset = 0;
          return this;
      },
  input:function () {
          var ch = this._input[0];
          this.yytext += ch;
          this.yyleng++;
          this.offset++;
          this.match += ch;
          this.matched += ch;
          var lines = ch.match(/(?:\r\n?|\n).*/g);
          if (lines) {
              this.yylineno++;
              this.yylloc.last_line++;
          } else {
              this.yylloc.last_column++;
          }
          if (this.options.ranges) this.yylloc.range[1]++;

          this._input = this._input.slice(1);
          return ch;
      },
  unput:function (ch) {
          var len = ch.length;
          var lines = ch.split(/(?:\r\n?|\n)/g);

          this._input = ch + this._input;
          this.yytext = this.yytext.substr(0, this.yytext.length-len-1);
          //this.yyleng -= len;
          this.offset -= len;
          var oldLines = this.match.split(/(?:\r\n?|\n)/g);
          this.match = this.match.substr(0, this.match.length-1);
          this.matched = this.matched.substr(0, this.matched.length-1);

          if (lines.length-1) this.yylineno -= lines.length-1;
          var r = this.yylloc.range;

          this.yylloc = {first_line: this.yylloc.first_line,
            last_line: this.yylineno+1,
            first_column: this.yylloc.first_column,
            last_column: lines ?
                (lines.length === oldLines.length ? this.yylloc.first_column : 0) + oldLines[oldLines.length - lines.length].length - lines[0].length:
                this.yylloc.first_column - len
            };

          if (this.options.ranges) {
              this.yylloc.range = [r[0], r[0] + this.yyleng - len];
          }
          return this;
      },
  more:function () {
          this._more = true;
          return this;
      },
  less:function (n) {
          this.unput(this.match.slice(n));
      },
  pastInput:function () {
          var past = this.matched.substr(0, this.matched.length - this.match.length);
          return (past.length > 20 ? '...':'') + past.substr(-20).replace(/\n/g, "");
      },
  upcomingInput:function () {
          var next = this.match;
          if (next.length < 20) {
              next += this._input.substr(0, 20-next.length);
          }
          return (next.substr(0,20)+(next.length > 20 ? '...':'')).replace(/\n/g, "");
      },
  showPosition:function () {
          var pre = this.pastInput();
          var c = new Array(pre.length + 1).join("-");
          return pre + this.upcomingInput() + "\n" + c+"^";
      },
  next:function () {
          if (this.done) {
              return this.EOF;
          }
          if (!this._input) this.done = true;

          var token,
              match,
              tempMatch,
              index,
              col,
              lines;
          if (!this._more) {
              this.yytext = '';
              this.match = '';
          }
          var rules = this._currentRules();
          for (var i=0;i < rules.length; i++) {
              tempMatch = this._input.match(this.rules[rules[i]]);
              if (tempMatch && (!match || tempMatch[0].length > match[0].length)) {
                  match = tempMatch;
                  index = i;
                  if (!this.options.flex) break;
              }
          }
          if (match) {
              lines = match[0].match(/(?:\r\n?|\n).*/g);
              if (lines) this.yylineno += lines.length;
              this.yylloc = {first_line: this.yylloc.last_line,
                             last_line: this.yylineno+1,
                             first_column: this.yylloc.last_column,
                             last_column: lines ? lines[lines.length-1].length-lines[lines.length-1].match(/\r?\n?/)[0].length : this.yylloc.last_column + match[0].length};
              this.yytext += match[0];
              this.match += match[0];
              this.matches = match;
              this.yyleng = this.yytext.length;
              if (this.options.ranges) {
                  this.yylloc.range = [this.offset, this.offset += this.yyleng];
              }
              this._more = false;
              this._input = this._input.slice(match[0].length);
              this.matched += match[0];
              token = this.performAction.call(this, this.yy, this, rules[index],this.conditionStack[this.conditionStack.length-1]);
              if (this.done && this._input) this.done = false;
              if (token) return token;
              else return;
          }
          if (this._input === "") {
              return this.EOF;
          } else {
              return this.parseError('Lexical error on line '+(this.yylineno+1)+'. Unrecognized text.\n'+this.showPosition(),
                      {text: "", token: null, line: this.yylineno});
          }
      },
  lex:function lex() {
          var r = this.next();
          if (typeof r !== 'undefined') {
              return r;
          } else {
              return this.lex();
          }
      },
  begin:function begin(condition) {
          this.conditionStack.push(condition);
      },
  popState:function popState() {
          return this.conditionStack.pop();
      },
  _currentRules:function _currentRules() {
          return this.conditions[this.conditionStack[this.conditionStack.length-1]].rules;
      },
  topState:function () {
          return this.conditionStack[this.conditionStack.length-2];
      },
  pushState:function begin(condition) {
          this.begin(condition);
      }});
  lexer.options = {};
  lexer.performAction = function anonymous(yy,yy_,$avoiding_name_collisions,YY_START) {


  function strip(start, end) {
    return yy_.yytext = yy_.yytext.substr(start, yy_.yyleng-end);
  }


  var YYSTATE=YY_START
  switch($avoiding_name_collisions) {
  case 0:
                                     if(yy_.yytext.slice(-2) === "\\\\") {
                                       strip(0,1);
                                       this.begin("mu");
                                     } else if(yy_.yytext.slice(-1) === "\\") {
                                       strip(0,1);
                                       this.begin("emu");
                                     } else {
                                       this.begin("mu");
                                     }
                                     if(yy_.yytext) return 14;
                                   
  break;
  case 1:return 14;
  break;
  case 2:
                                     this.popState();
                                     return 14;
                                   
  break;
  case 3:strip(0,4); this.popState(); return 15;
  break;
  case 4:return 35;
  break;
  case 5:return 36;
  break;
  case 6:return 25;
  break;
  case 7:return 16;
  break;
  case 8:return 20;
  break;
  case 9:return 19;
  break;
  case 10:return 19;
  break;
  case 11:return 23;
  break;
  case 12:return 22;
  break;
  case 13:this.popState(); this.begin('com');
  break;
  case 14:strip(3,5); this.popState(); return 15;
  break;
  case 15:return 22;
  break;
  case 16:return 41;
  break;
  case 17:return 40;
  break;
  case 18:return 40;
  break;
  case 19:return 44;
  break;
  case 20:// ignore whitespace
  break;
  case 21:this.popState(); return 24;
  break;
  case 22:this.popState(); return 18;
  break;
  case 23:yy_.yytext = strip(1,2).replace(/\\"/g,'"'); return 32;
  break;
  case 24:yy_.yytext = strip(1,2).replace(/\\'/g,"'"); return 32;
  break;
  case 25:return 42;
  break;
  case 26:return 34;
  break;
  case 27:return 34;
  break;
  case 28:return 33;
  break;
  case 29:return 40;
  break;
  case 30:yy_.yytext = strip(1,2); return 40;
  break;
  case 31:return 'INVALID';
  break;
  case 32:return 5;
  break;
  }
  };
  lexer.rules = [/^(?:[^\x00]*?(?=(\{\{)))/,/^(?:[^\x00]+)/,/^(?:[^\x00]{2,}?(?=(\{\{|\\\{\{|\\\\\{\{|$)))/,/^(?:[\s\S]*?--\}\})/,/^(?:\()/,/^(?:\))/,/^(?:\{\{(~)?>)/,/^(?:\{\{(~)?#)/,/^(?:\{\{(~)?\/)/,/^(?:\{\{(~)?\^)/,/^(?:\{\{(~)?\s*else\b)/,/^(?:\{\{(~)?\{)/,/^(?:\{\{(~)?&)/,/^(?:\{\{!--)/,/^(?:\{\{![\s\S]*?\}\})/,/^(?:\{\{(~)?)/,/^(?:=)/,/^(?:\.\.)/,/^(?:\.(?=([=~}\s\/.)])))/,/^(?:[\/.])/,/^(?:\s+)/,/^(?:\}(~)?\}\})/,/^(?:(~)?\}\})/,/^(?:"(\\["]|[^"])*")/,/^(?:'(\\[']|[^'])*')/,/^(?:@)/,/^(?:true(?=([~}\s)])))/,/^(?:false(?=([~}\s)])))/,/^(?:-?[0-9]+(?=([~}\s)])))/,/^(?:([^\s!"#%-,\.\/;->@\[-\^`\{-~]+(?=([=~}\s\/.)]))))/,/^(?:\[[^\]]*\])/,/^(?:.)/,/^(?:$)/];
  lexer.conditions = {"mu":{"rules":[4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32],"inclusive":false},"emu":{"rules":[2],"inclusive":false},"com":{"rules":[3],"inclusive":false},"INITIAL":{"rules":[0,1,32],"inclusive":true}};
  return lexer;})()
  parser.lexer = lexer;
  function Parser () { this.yy = {}; }Parser.prototype = parser;parser.Parser = Parser;
  return new Parser;
  })();__exports__ = handlebars;
  /* jshint ignore:end */
  return __exports__;
})();

// handlebars/compiler/base.js
var __module8__ = (function(__dependency1__, __dependency2__) {
  "use strict";
  var __exports__ = {};
  var parser = __dependency1__;
  var AST = __dependency2__;

  __exports__.parser = parser;

  function parse(input) {
    // Just return if an already-compile AST was passed in.
    if(input.constructor === AST.ProgramNode) { return input; }

    parser.yy = AST;
    return parser.parse(input);
  }

  __exports__.parse = parse;
  return __exports__;
})(__module9__, __module7__);

// handlebars/compiler/compiler.js
var __module10__ = (function(__dependency1__) {
  "use strict";
  var __exports__ = {};
  var Exception = __dependency1__;

  function Compiler() {}

  __exports__.Compiler = Compiler;// the foundHelper register will disambiguate helper lookup from finding a
  // function in a context. This is necessary for mustache compatibility, which
  // requires that context functions in blocks are evaluated by blockHelperMissing,
  // and then proceed as if the resulting value was provided to blockHelperMissing.

  Compiler.prototype = {
    compiler: Compiler,

    disassemble: function() {
      var opcodes = this.opcodes, opcode, out = [], params, param;

      for (var i=0, l=opcodes.length; i<l; i++) {
        opcode = opcodes[i];

        if (opcode.opcode === 'DECLARE') {
          out.push("DECLARE " + opcode.name + "=" + opcode.value);
        } else {
          params = [];
          for (var j=0; j<opcode.args.length; j++) {
            param = opcode.args[j];
            if (typeof param === "string") {
              param = "\"" + param.replace("\n", "\\n") + "\"";
            }
            params.push(param);
          }
          out.push(opcode.opcode + " " + params.join(" "));
        }
      }

      return out.join("\n");
    },

    equals: function(other) {
      var len = this.opcodes.length;
      if (other.opcodes.length !== len) {
        return false;
      }

      for (var i = 0; i < len; i++) {
        var opcode = this.opcodes[i],
            otherOpcode = other.opcodes[i];
        if (opcode.opcode !== otherOpcode.opcode || opcode.args.length !== otherOpcode.args.length) {
          return false;
        }
        for (var j = 0; j < opcode.args.length; j++) {
          if (opcode.args[j] !== otherOpcode.args[j]) {
            return false;
          }
        }
      }

      len = this.children.length;
      if (other.children.length !== len) {
        return false;
      }
      for (i = 0; i < len; i++) {
        if (!this.children[i].equals(other.children[i])) {
          return false;
        }
      }

      return true;
    },

    guid: 0,

    compile: function(program, options) {
      this.opcodes = [];
      this.children = [];
      this.depths = {list: []};
      this.options = options;

      // These changes will propagate to the other compiler components
      var knownHelpers = this.options.knownHelpers;
      this.options.knownHelpers = {
        'helperMissing': true,
        'blockHelperMissing': true,
        'each': true,
        'if': true,
        'unless': true,
        'with': true,
        'log': true
      };
      if (knownHelpers) {
        for (var name in knownHelpers) {
          this.options.knownHelpers[name] = knownHelpers[name];
        }
      }

      return this.accept(program);
    },

    accept: function(node) {
      var strip = node.strip || {},
          ret;
      if (strip.left) {
        this.opcode('strip');
      }

      ret = this[node.type](node);

      if (strip.right) {
        this.opcode('strip');
      }

      return ret;
    },

    program: function(program) {
      var statements = program.statements;

      for(var i=0, l=statements.length; i<l; i++) {
        this.accept(statements[i]);
      }
      this.isSimple = l === 1;

      this.depths.list = this.depths.list.sort(function(a, b) {
        return a - b;
      });

      return this;
    },

    compileProgram: function(program) {
      var result = new this.compiler().compile(program, this.options);
      var guid = this.guid++, depth;

      this.usePartial = this.usePartial || result.usePartial;

      this.children[guid] = result;

      for(var i=0, l=result.depths.list.length; i<l; i++) {
        depth = result.depths.list[i];

        if(depth < 2) { continue; }
        else { this.addDepth(depth - 1); }
      }

      return guid;
    },

    block: function(block) {
      var mustache = block.mustache,
          program = block.program,
          inverse = block.inverse;

      if (program) {
        program = this.compileProgram(program);
      }

      if (inverse) {
        inverse = this.compileProgram(inverse);
      }

      var sexpr = mustache.sexpr;
      var type = this.classifySexpr(sexpr);

      if (type === "helper") {
        this.helperSexpr(sexpr, program, inverse);
      } else if (type === "simple") {
        this.simpleSexpr(sexpr);

        // now that the simple mustache is resolved, we need to
        // evaluate it by executing `blockHelperMissing`
        this.opcode('pushProgram', program);
        this.opcode('pushProgram', inverse);
        this.opcode('emptyHash');
        this.opcode('blockValue');
      } else {
        this.ambiguousSexpr(sexpr, program, inverse);

        // now that the simple mustache is resolved, we need to
        // evaluate it by executing `blockHelperMissing`
        this.opcode('pushProgram', program);
        this.opcode('pushProgram', inverse);
        this.opcode('emptyHash');
        this.opcode('ambiguousBlockValue');
      }

      this.opcode('append');
    },

    hash: function(hash) {
      var pairs = hash.pairs, pair, val;

      this.opcode('pushHash');

      for(var i=0, l=pairs.length; i<l; i++) {
        pair = pairs[i];
        val  = pair[1];

        if (this.options.stringParams) {
          if(val.depth) {
            this.addDepth(val.depth);
          }
          this.opcode('getContext', val.depth || 0);
          this.opcode('pushStringParam', val.stringModeValue, val.type);

          if (val.type === 'sexpr') {
            // Subexpressions get evaluated and passed in
            // in string params mode.
            this.sexpr(val);
          }
        } else {
          this.accept(val);
        }

        this.opcode('assignToHash', pair[0]);
      }
      this.opcode('popHash');
    },

    partial: function(partial) {
      var partialName = partial.partialName;
      this.usePartial = true;

      if(partial.context) {
        this.ID(partial.context);
      } else {
        this.opcode('push', 'depth0');
      }

      this.opcode('invokePartial', partialName.name);
      this.opcode('append');
    },

    content: function(content) {
      this.opcode('appendContent', content.string);
    },

    mustache: function(mustache) {
      this.sexpr(mustache.sexpr);

      if(mustache.escaped && !this.options.noEscape) {
        this.opcode('appendEscaped');
      } else {
        this.opcode('append');
      }
    },

    ambiguousSexpr: function(sexpr, program, inverse) {
      var id = sexpr.id,
          name = id.parts[0],
          isBlock = program != null || inverse != null;

      this.opcode('getContext', id.depth);

      this.opcode('pushProgram', program);
      this.opcode('pushProgram', inverse);

      this.opcode('invokeAmbiguous', name, isBlock);
    },

    simpleSexpr: function(sexpr) {
      var id = sexpr.id;

      if (id.type === 'DATA') {
        this.DATA(id);
      } else if (id.parts.length) {
        this.ID(id);
      } else {
        // Simplified ID for `this`
        this.addDepth(id.depth);
        this.opcode('getContext', id.depth);
        this.opcode('pushContext');
      }

      this.opcode('resolvePossibleLambda');
    },

    helperSexpr: function(sexpr, program, inverse) {
      var params = this.setupFullMustacheParams(sexpr, program, inverse),
          name = sexpr.id.parts[0];

      if (this.options.knownHelpers[name]) {
        this.opcode('invokeKnownHelper', params.length, name);
      } else if (this.options.knownHelpersOnly) {
        throw new Exception("You specified knownHelpersOnly, but used the unknown helper " + name, sexpr);
      } else {
        this.opcode('invokeHelper', params.length, name, sexpr.isRoot);
      }
    },

    sexpr: function(sexpr) {
      var type = this.classifySexpr(sexpr);

      if (type === "simple") {
        this.simpleSexpr(sexpr);
      } else if (type === "helper") {
        this.helperSexpr(sexpr);
      } else {
        this.ambiguousSexpr(sexpr);
      }
    },

    ID: function(id) {
      this.addDepth(id.depth);
      this.opcode('getContext', id.depth);

      var name = id.parts[0];
      if (!name) {
        this.opcode('pushContext');
      } else {
        this.opcode('lookupOnContext', id.parts[0]);
      }

      for(var i=1, l=id.parts.length; i<l; i++) {
        this.opcode('lookup', id.parts[i]);
      }
    },

    DATA: function(data) {
      this.options.data = true;
      if (data.id.isScoped || data.id.depth) {
        throw new Exception('Scoped data references are not supported: ' + data.original, data);
      }

      this.opcode('lookupData');
      var parts = data.id.parts;
      for(var i=0, l=parts.length; i<l; i++) {
        this.opcode('lookup', parts[i]);
      }
    },

    STRING: function(string) {
      this.opcode('pushString', string.string);
    },

    INTEGER: function(integer) {
      this.opcode('pushLiteral', integer.integer);
    },

    BOOLEAN: function(bool) {
      this.opcode('pushLiteral', bool.bool);
    },

    comment: function() {},

    // HELPERS
    opcode: function(name) {
      this.opcodes.push({ opcode: name, args: [].slice.call(arguments, 1) });
    },

    declare: function(name, value) {
      this.opcodes.push({ opcode: 'DECLARE', name: name, value: value });
    },

    addDepth: function(depth) {
      if(depth === 0) { return; }

      if(!this.depths[depth]) {
        this.depths[depth] = true;
        this.depths.list.push(depth);
      }
    },

    classifySexpr: function(sexpr) {
      var isHelper   = sexpr.isHelper;
      var isEligible = sexpr.eligibleHelper;
      var options    = this.options;

      // if ambiguous, we can possibly resolve the ambiguity now
      if (isEligible && !isHelper) {
        var name = sexpr.id.parts[0];

        if (options.knownHelpers[name]) {
          isHelper = true;
        } else if (options.knownHelpersOnly) {
          isEligible = false;
        }
      }

      if (isHelper) { return "helper"; }
      else if (isEligible) { return "ambiguous"; }
      else { return "simple"; }
    },

    pushParams: function(params) {
      var i = params.length, param;

      while(i--) {
        param = params[i];

        if(this.options.stringParams) {
          if(param.depth) {
            this.addDepth(param.depth);
          }

          this.opcode('getContext', param.depth || 0);
          this.opcode('pushStringParam', param.stringModeValue, param.type);

          if (param.type === 'sexpr') {
            // Subexpressions get evaluated and passed in
            // in string params mode.
            this.sexpr(param);
          }
        } else {
          this[param.type](param);
        }
      }
    },

    setupFullMustacheParams: function(sexpr, program, inverse) {
      var params = sexpr.params;
      this.pushParams(params);

      this.opcode('pushProgram', program);
      this.opcode('pushProgram', inverse);

      if (sexpr.hash) {
        this.hash(sexpr.hash);
      } else {
        this.opcode('emptyHash');
      }

      return params;
    }
  };

  function precompile(input, options, env) {
    if (input == null || (typeof input !== 'string' && input.constructor !== env.AST.ProgramNode)) {
      throw new Exception("You must pass a string or Handlebars AST to Handlebars.precompile. You passed " + input);
    }

    options = options || {};
    if (!('data' in options)) {
      options.data = true;
    }

    var ast = env.parse(input);
    var environment = new env.Compiler().compile(ast, options);
    return new env.JavaScriptCompiler().compile(environment, options);
  }

  __exports__.precompile = precompile;function compile(input, options, env) {
    if (input == null || (typeof input !== 'string' && input.constructor !== env.AST.ProgramNode)) {
      throw new Exception("You must pass a string or Handlebars AST to Handlebars.compile. You passed " + input);
    }

    options = options || {};

    if (!('data' in options)) {
      options.data = true;
    }

    var compiled;

    function compileInput() {
      var ast = env.parse(input);
      var environment = new env.Compiler().compile(ast, options);
      var templateSpec = new env.JavaScriptCompiler().compile(environment, options, undefined, true);
      return env.template(templateSpec);
    }

    // Template is only compiled on first use and cached after that point.
    return function(context, options) {
      if (!compiled) {
        compiled = compileInput();
      }
      return compiled.call(this, context, options);
    };
  }

  __exports__.compile = compile;
  return __exports__;
})(__module5__);

// handlebars/compiler/javascript-compiler.js
var __module11__ = (function(__dependency1__, __dependency2__) {
  "use strict";
  var __exports__;
  var COMPILER_REVISION = __dependency1__.COMPILER_REVISION;
  var REVISION_CHANGES = __dependency1__.REVISION_CHANGES;
  var log = __dependency1__.log;
  var Exception = __dependency2__;

  function Literal(value) {
    this.value = value;
  }

  function JavaScriptCompiler() {}

  JavaScriptCompiler.prototype = {
    // PUBLIC API: You can override these methods in a subclass to provide
    // alternative compiled forms for name lookup and buffering semantics
    nameLookup: function(parent, name /* , type*/) {
      var wrap,
          ret;
      if (parent.indexOf('depth') === 0) {
        wrap = true;
      }

      if (/^[0-9]+$/.test(name)) {
        ret = parent + "[" + name + "]";
      } else if (JavaScriptCompiler.isValidJavaScriptVariableName(name)) {
        ret = parent + "." + name;
      }
      else {
        ret = parent + "['" + name + "']";
      }

      if (wrap) {
        return '(' + parent + ' && ' + ret + ')';
      } else {
        return ret;
      }
    },

    compilerInfo: function() {
      var revision = COMPILER_REVISION,
          versions = REVISION_CHANGES[revision];
      return "this.compilerInfo = ["+revision+",'"+versions+"'];\n";
    },

    appendToBuffer: function(string) {
      if (this.environment.isSimple) {
        return "return " + string + ";";
      } else {
        return {
          appendToBuffer: true,
          content: string,
          toString: function() { return "buffer += " + string + ";"; }
        };
      }
    },

    initializeBuffer: function() {
      return this.quotedString("");
    },

    namespace: "Handlebars",
    // END PUBLIC API

    compile: function(environment, options, context, asObject) {
      this.environment = environment;
      this.options = options || {};

      log('debug', this.environment.disassemble() + "\n\n");

      this.name = this.environment.name;
      this.isChild = !!context;
      this.context = context || {
        programs: [],
        environments: [],
        aliases: { }
      };

      this.preamble();

      this.stackSlot = 0;
      this.stackVars = [];
      this.registers = { list: [] };
      this.hashes = [];
      this.compileStack = [];
      this.inlineStack = [];

      this.compileChildren(environment, options);

      var opcodes = environment.opcodes, opcode;

      this.i = 0;

      for(var l=opcodes.length; this.i<l; this.i++) {
        opcode = opcodes[this.i];

        if(opcode.opcode === 'DECLARE') {
          this[opcode.name] = opcode.value;
        } else {
          this[opcode.opcode].apply(this, opcode.args);
        }

        // Reset the stripNext flag if it was not set by this operation.
        if (opcode.opcode !== this.stripNext) {
          this.stripNext = false;
        }
      }

      // Flush any trailing content that might be pending.
      this.pushSource('');

      if (this.stackSlot || this.inlineStack.length || this.compileStack.length) {
        throw new Exception('Compile completed with content left on stack');
      }

      return this.createFunctionContext(asObject);
    },

    preamble: function() {
      var out = [];

      if (!this.isChild) {
        var namespace = this.namespace;

        var copies = "helpers = this.merge(helpers, " + namespace + ".helpers);";
        if (this.environment.usePartial) { copies = copies + " partials = this.merge(partials, " + namespace + ".partials);"; }
        if (this.options.data) { copies = copies + " data = data || {};"; }
        out.push(copies);
      } else {
        out.push('');
      }

      if (!this.environment.isSimple) {
        out.push(", buffer = " + this.initializeBuffer());
      } else {
        out.push("");
      }

      // track the last context pushed into place to allow skipping the
      // getContext opcode when it would be a noop
      this.lastContext = 0;
      this.source = out;
    },

    createFunctionContext: function(asObject) {
      var locals = this.stackVars.concat(this.registers.list);

      if(locals.length > 0) {
        this.source[1] = this.source[1] + ", " + locals.join(", ");
      }

      // Generate minimizer alias mappings
      if (!this.isChild) {
        for (var alias in this.context.aliases) {
          if (this.context.aliases.hasOwnProperty(alias)) {
            this.source[1] = this.source[1] + ', ' + alias + '=' + this.context.aliases[alias];
          }
        }
      }

      if (this.source[1]) {
        this.source[1] = "var " + this.source[1].substring(2) + ";";
      }

      // Merge children
      if (!this.isChild) {
        this.source[1] += '\n' + this.context.programs.join('\n') + '\n';
      }

      if (!this.environment.isSimple) {
        this.pushSource("return buffer;");
      }

      var params = this.isChild ? ["depth0", "data"] : ["Handlebars", "depth0", "helpers", "partials", "data"];

      for(var i=0, l=this.environment.depths.list.length; i<l; i++) {
        params.push("depth" + this.environment.depths.list[i]);
      }

      // Perform a second pass over the output to merge content when possible
      var source = this.mergeSource();

      if (!this.isChild) {
        source = this.compilerInfo()+source;
      }

      if (asObject) {
        params.push(source);

        return Function.apply(this, params);
      } else {
        var functionSource = 'function ' + (this.name || '') + '(' + params.join(',') + ') {\n  ' + source + '}';
        log('debug', functionSource + "\n\n");
        return functionSource;
      }
    },
    mergeSource: function() {
      // WARN: We are not handling the case where buffer is still populated as the source should
      // not have buffer append operations as their final action.
      var source = '',
          buffer;
      for (var i = 0, len = this.source.length; i < len; i++) {
        var line = this.source[i];
        if (line.appendToBuffer) {
          if (buffer) {
            buffer = buffer + '\n    + ' + line.content;
          } else {
            buffer = line.content;
          }
        } else {
          if (buffer) {
            source += 'buffer += ' + buffer + ';\n  ';
            buffer = undefined;
          }
          source += line + '\n  ';
        }
      }
      return source;
    },

    // [blockValue]
    //
    // On stack, before: hash, inverse, program, value
    // On stack, after: return value of blockHelperMissing
    //
    // The purpose of this opcode is to take a block of the form
    // `{{#foo}}...{{/foo}}`, resolve the value of `foo`, and
    // replace it on the stack with the result of properly
    // invoking blockHelperMissing.
    blockValue: function() {
      this.context.aliases.blockHelperMissing = 'helpers.blockHelperMissing';

      var params = ["depth0"];
      this.setupParams(0, params);

      this.replaceStack(function(current) {
        params.splice(1, 0, current);
        return "blockHelperMissing.call(" + params.join(", ") + ")";
      });
    },

    // [ambiguousBlockValue]
    //
    // On stack, before: hash, inverse, program, value
    // Compiler value, before: lastHelper=value of last found helper, if any
    // On stack, after, if no lastHelper: same as [blockValue]
    // On stack, after, if lastHelper: value
    ambiguousBlockValue: function() {
      this.context.aliases.blockHelperMissing = 'helpers.blockHelperMissing';

      var params = ["depth0"];
      this.setupParams(0, params);

      var current = this.topStack();
      params.splice(1, 0, current);

      this.pushSource("if (!" + this.lastHelper + ") { " + current + " = blockHelperMissing.call(" + params.join(", ") + "); }");
    },

    // [appendContent]
    //
    // On stack, before: ...
    // On stack, after: ...
    //
    // Appends the string value of `content` to the current buffer
    appendContent: function(content) {
      if (this.pendingContent) {
        content = this.pendingContent + content;
      }
      if (this.stripNext) {
        content = content.replace(/^\s+/, '');
      }

      this.pendingContent = content;
    },

    // [strip]
    //
    // On stack, before: ...
    // On stack, after: ...
    //
    // Removes any trailing whitespace from the prior content node and flags
    // the next operation for stripping if it is a content node.
    strip: function() {
      if (this.pendingContent) {
        this.pendingContent = this.pendingContent.replace(/\s+$/, '');
      }
      this.stripNext = 'strip';
    },

    // [append]
    //
    // On stack, before: value, ...
    // On stack, after: ...
    //
    // Coerces `value` to a String and appends it to the current buffer.
    //
    // If `value` is truthy, or 0, it is coerced into a string and appended
    // Otherwise, the empty string is appended
    append: function() {
      // Force anything that is inlined onto the stack so we don't have duplication
      // when we examine local
      this.flushInline();
      var local = this.popStack();
      this.pushSource("if(" + local + " || " + local + " === 0) { " + this.appendToBuffer(local) + " }");
      if (this.environment.isSimple) {
        this.pushSource("else { " + this.appendToBuffer("''") + " }");
      }
    },

    // [appendEscaped]
    //
    // On stack, before: value, ...
    // On stack, after: ...
    //
    // Escape `value` and append it to the buffer
    appendEscaped: function() {
      this.context.aliases.escapeExpression = 'this.escapeExpression';

      this.pushSource(this.appendToBuffer("escapeExpression(" + this.popStack() + ")"));
    },

    // [getContext]
    //
    // On stack, before: ...
    // On stack, after: ...
    // Compiler value, after: lastContext=depth
    //
    // Set the value of the `lastContext` compiler value to the depth
    getContext: function(depth) {
      if(this.lastContext !== depth) {
        this.lastContext = depth;
      }
    },

    // [lookupOnContext]
    //
    // On stack, before: ...
    // On stack, after: currentContext[name], ...
    //
    // Looks up the value of `name` on the current context and pushes
    // it onto the stack.
    lookupOnContext: function(name) {
      this.push(this.nameLookup('depth' + this.lastContext, name, 'context'));
    },

    // [pushContext]
    //
    // On stack, before: ...
    // On stack, after: currentContext, ...
    //
    // Pushes the value of the current context onto the stack.
    pushContext: function() {
      this.pushStackLiteral('depth' + this.lastContext);
    },

    // [resolvePossibleLambda]
    //
    // On stack, before: value, ...
    // On stack, after: resolved value, ...
    //
    // If the `value` is a lambda, replace it on the stack by
    // the return value of the lambda
    resolvePossibleLambda: function() {
      this.context.aliases.functionType = '"function"';

      this.replaceStack(function(current) {
        return "typeof " + current + " === functionType ? " + current + ".apply(depth0) : " + current;
      });
    },

    // [lookup]
    //
    // On stack, before: value, ...
    // On stack, after: value[name], ...
    //
    // Replace the value on the stack with the result of looking
    // up `name` on `value`
    lookup: function(name) {
      this.replaceStack(function(current) {
        return current + " == null || " + current + " === false ? " + current + " : " + this.nameLookup(current, name, 'context');
      });
    },

    // [lookupData]
    //
    // On stack, before: ...
    // On stack, after: data, ...
    //
    // Push the data lookup operator
    lookupData: function() {
      this.pushStackLiteral('data');
    },

    // [pushStringParam]
    //
    // On stack, before: ...
    // On stack, after: string, currentContext, ...
    //
    // This opcode is designed for use in string mode, which
    // provides the string value of a parameter along with its
    // depth rather than resolving it immediately.
    pushStringParam: function(string, type) {
      this.pushStackLiteral('depth' + this.lastContext);

      this.pushString(type);

      // If it's a subexpression, the string result
      // will be pushed after this opcode.
      if (type !== 'sexpr') {
        if (typeof string === 'string') {
          this.pushString(string);
        } else {
          this.pushStackLiteral(string);
        }
      }
    },

    emptyHash: function() {
      this.pushStackLiteral('{}');

      if (this.options.stringParams) {
        this.push('{}'); // hashContexts
        this.push('{}'); // hashTypes
      }
    },
    pushHash: function() {
      if (this.hash) {
        this.hashes.push(this.hash);
      }
      this.hash = {values: [], types: [], contexts: []};
    },
    popHash: function() {
      var hash = this.hash;
      this.hash = this.hashes.pop();

      if (this.options.stringParams) {
        this.push('{' + hash.contexts.join(',') + '}');
        this.push('{' + hash.types.join(',') + '}');
      }

      this.push('{\n    ' + hash.values.join(',\n    ') + '\n  }');
    },

    // [pushString]
    //
    // On stack, before: ...
    // On stack, after: quotedString(string), ...
    //
    // Push a quoted version of `string` onto the stack
    pushString: function(string) {
      this.pushStackLiteral(this.quotedString(string));
    },

    // [push]
    //
    // On stack, before: ...
    // On stack, after: expr, ...
    //
    // Push an expression onto the stack
    push: function(expr) {
      this.inlineStack.push(expr);
      return expr;
    },

    // [pushLiteral]
    //
    // On stack, before: ...
    // On stack, after: value, ...
    //
    // Pushes a value onto the stack. This operation prevents
    // the compiler from creating a temporary variable to hold
    // it.
    pushLiteral: function(value) {
      this.pushStackLiteral(value);
    },

    // [pushProgram]
    //
    // On stack, before: ...
    // On stack, after: program(guid), ...
    //
    // Push a program expression onto the stack. This takes
    // a compile-time guid and converts it into a runtime-accessible
    // expression.
    pushProgram: function(guid) {
      if (guid != null) {
        this.pushStackLiteral(this.programExpression(guid));
      } else {
        this.pushStackLiteral(null);
      }
    },

    // [invokeHelper]
    //
    // On stack, before: hash, inverse, program, params..., ...
    // On stack, after: result of helper invocation
    //
    // Pops off the helper's parameters, invokes the helper,
    // and pushes the helper's return value onto the stack.
    //
    // If the helper is not found, `helperMissing` is called.
    invokeHelper: function(paramSize, name, isRoot) {
      this.context.aliases.helperMissing = 'helpers.helperMissing';
      this.useRegister('helper');

      var helper = this.lastHelper = this.setupHelper(paramSize, name, true);
      var nonHelper = this.nameLookup('depth' + this.lastContext, name, 'context');

      var lookup = 'helper = ' + helper.name + ' || ' + nonHelper;
      if (helper.paramsInit) {
        lookup += ',' + helper.paramsInit;
      }

      this.push(
        '('
          + lookup
          + ',helper '
            + '? helper.call(' + helper.callParams + ') '
            + ': helperMissing.call(' + helper.helperMissingParams + '))');

      // Always flush subexpressions. This is both to prevent the compounding size issue that
      // occurs when the code has to be duplicated for inlining and also to prevent errors
      // due to the incorrect options object being passed due to the shared register.
      if (!isRoot) {
        this.flushInline();
      }
    },

    // [invokeKnownHelper]
    //
    // On stack, before: hash, inverse, program, params..., ...
    // On stack, after: result of helper invocation
    //
    // This operation is used when the helper is known to exist,
    // so a `helperMissing` fallback is not required.
    invokeKnownHelper: function(paramSize, name) {
      var helper = this.setupHelper(paramSize, name);
      this.push(helper.name + ".call(" + helper.callParams + ")");
    },

    // [invokeAmbiguous]
    //
    // On stack, before: hash, inverse, program, params..., ...
    // On stack, after: result of disambiguation
    //
    // This operation is used when an expression like `{{foo}}`
    // is provided, but we don't know at compile-time whether it
    // is a helper or a path.
    //
    // This operation emits more code than the other options,
    // and can be avoided by passing the `knownHelpers` and
    // `knownHelpersOnly` flags at compile-time.
    invokeAmbiguous: function(name, helperCall) {
      this.context.aliases.functionType = '"function"';
      this.useRegister('helper');

      this.emptyHash();
      var helper = this.setupHelper(0, name, helperCall);

      var helperName = this.lastHelper = this.nameLookup('helpers', name, 'helper');

      var nonHelper = this.nameLookup('depth' + this.lastContext, name, 'context');
      var nextStack = this.nextStack();

      if (helper.paramsInit) {
        this.pushSource(helper.paramsInit);
      }
      this.pushSource('if (helper = ' + helperName + ') { ' + nextStack + ' = helper.call(' + helper.callParams + '); }');
      this.pushSource('else { helper = ' + nonHelper + '; ' + nextStack + ' = typeof helper === functionType ? helper.call(' + helper.callParams + ') : helper; }');
    },

    // [invokePartial]
    //
    // On stack, before: context, ...
    // On stack after: result of partial invocation
    //
    // This operation pops off a context, invokes a partial with that context,
    // and pushes the result of the invocation back.
    invokePartial: function(name) {
      var params = [this.nameLookup('partials', name, 'partial'), "'" + name + "'", this.popStack(), "helpers", "partials"];

      if (this.options.data) {
        params.push("data");
      }

      this.context.aliases.self = "this";
      this.push("self.invokePartial(" + params.join(", ") + ")");
    },

    // [assignToHash]
    //
    // On stack, before: value, hash, ...
    // On stack, after: hash, ...
    //
    // Pops a value and hash off the stack, assigns `hash[key] = value`
    // and pushes the hash back onto the stack.
    assignToHash: function(key) {
      var value = this.popStack(),
          context,
          type;

      if (this.options.stringParams) {
        type = this.popStack();
        context = this.popStack();
      }

      var hash = this.hash;
      if (context) {
        hash.contexts.push("'" + key + "': " + context);
      }
      if (type) {
        hash.types.push("'" + key + "': " + type);
      }
      hash.values.push("'" + key + "': (" + value + ")");
    },

    // HELPERS

    compiler: JavaScriptCompiler,

    compileChildren: function(environment, options) {
      var children = environment.children, child, compiler;

      for(var i=0, l=children.length; i<l; i++) {
        child = children[i];
        compiler = new this.compiler();

        var index = this.matchExistingProgram(child);

        if (index == null) {
          this.context.programs.push('');     // Placeholder to prevent name conflicts for nested children
          index = this.context.programs.length;
          child.index = index;
          child.name = 'program' + index;
          this.context.programs[index] = compiler.compile(child, options, this.context);
          this.context.environments[index] = child;
        } else {
          child.index = index;
          child.name = 'program' + index;
        }
      }
    },
    matchExistingProgram: function(child) {
      for (var i = 0, len = this.context.environments.length; i < len; i++) {
        var environment = this.context.environments[i];
        if (environment && environment.equals(child)) {
          return i;
        }
      }
    },

    programExpression: function(guid) {
      this.context.aliases.self = "this";

      if(guid == null) {
        return "self.noop";
      }

      var child = this.environment.children[guid],
          depths = child.depths.list, depth;

      var programParams = [child.index, child.name, "data"];

      for(var i=0, l = depths.length; i<l; i++) {
        depth = depths[i];

        if(depth === 1) { programParams.push("depth0"); }
        else { programParams.push("depth" + (depth - 1)); }
      }

      return (depths.length === 0 ? "self.program(" : "self.programWithDepth(") + programParams.join(", ") + ")";
    },

    register: function(name, val) {
      this.useRegister(name);
      this.pushSource(name + " = " + val + ";");
    },

    useRegister: function(name) {
      if(!this.registers[name]) {
        this.registers[name] = true;
        this.registers.list.push(name);
      }
    },

    pushStackLiteral: function(item) {
      return this.push(new Literal(item));
    },

    pushSource: function(source) {
      if (this.pendingContent) {
        this.source.push(this.appendToBuffer(this.quotedString(this.pendingContent)));
        this.pendingContent = undefined;
      }

      if (source) {
        this.source.push(source);
      }
    },

    pushStack: function(item) {
      this.flushInline();

      var stack = this.incrStack();
      if (item) {
        this.pushSource(stack + " = " + item + ";");
      }
      this.compileStack.push(stack);
      return stack;
    },

    replaceStack: function(callback) {
      var prefix = '',
          inline = this.isInline(),
          stack,
          createdStack,
          usedLiteral;

      // If we are currently inline then we want to merge the inline statement into the
      // replacement statement via ','
      if (inline) {
        var top = this.popStack(true);

        if (top instanceof Literal) {
          // Literals do not need to be inlined
          stack = top.value;
          usedLiteral = true;
        } else {
          // Get or create the current stack name for use by the inline
          createdStack = !this.stackSlot;
          var name = !createdStack ? this.topStackName() : this.incrStack();

          prefix = '(' + this.push(name) + ' = ' + top + '),';
          stack = this.topStack();
        }
      } else {
        stack = this.topStack();
      }

      var item = callback.call(this, stack);

      if (inline) {
        if (!usedLiteral) {
          this.popStack();
        }
        if (createdStack) {
          this.stackSlot--;
        }
        this.push('(' + prefix + item + ')');
      } else {
        // Prevent modification of the context depth variable. Through replaceStack
        if (!/^stack/.test(stack)) {
          stack = this.nextStack();
        }

        this.pushSource(stack + " = (" + prefix + item + ");");
      }
      return stack;
    },

    nextStack: function() {
      return this.pushStack();
    },

    incrStack: function() {
      this.stackSlot++;
      if(this.stackSlot > this.stackVars.length) { this.stackVars.push("stack" + this.stackSlot); }
      return this.topStackName();
    },
    topStackName: function() {
      return "stack" + this.stackSlot;
    },
    flushInline: function() {
      var inlineStack = this.inlineStack;
      if (inlineStack.length) {
        this.inlineStack = [];
        for (var i = 0, len = inlineStack.length; i < len; i++) {
          var entry = inlineStack[i];
          if (entry instanceof Literal) {
            this.compileStack.push(entry);
          } else {
            this.pushStack(entry);
          }
        }
      }
    },
    isInline: function() {
      return this.inlineStack.length;
    },

    popStack: function(wrapped) {
      var inline = this.isInline(),
          item = (inline ? this.inlineStack : this.compileStack).pop();

      if (!wrapped && (item instanceof Literal)) {
        return item.value;
      } else {
        if (!inline) {
          if (!this.stackSlot) {
            throw new Exception('Invalid stack pop');
          }
          this.stackSlot--;
        }
        return item;
      }
    },

    topStack: function(wrapped) {
      var stack = (this.isInline() ? this.inlineStack : this.compileStack),
          item = stack[stack.length - 1];

      if (!wrapped && (item instanceof Literal)) {
        return item.value;
      } else {
        return item;
      }
    },

    quotedString: function(str) {
      return '"' + str
        .replace(/\\/g, '\\\\')
        .replace(/"/g, '\\"')
        .replace(/\n/g, '\\n')
        .replace(/\r/g, '\\r')
        .replace(/\u2028/g, '\\u2028')   // Per Ecma-262 7.3 + 7.8.4
        .replace(/\u2029/g, '\\u2029') + '"';
    },

    setupHelper: function(paramSize, name, missingParams) {
      var params = [],
          paramsInit = this.setupParams(paramSize, params, missingParams);
      var foundHelper = this.nameLookup('helpers', name, 'helper');

      return {
        params: params,
        paramsInit: paramsInit,
        name: foundHelper,
        callParams: ["depth0"].concat(params).join(", "),
        helperMissingParams: missingParams && ["depth0", this.quotedString(name)].concat(params).join(", ")
      };
    },

    setupOptions: function(paramSize, params) {
      var options = [], contexts = [], types = [], param, inverse, program;

      options.push("hash:" + this.popStack());

      if (this.options.stringParams) {
        options.push("hashTypes:" + this.popStack());
        options.push("hashContexts:" + this.popStack());
      }

      inverse = this.popStack();
      program = this.popStack();

      // Avoid setting fn and inverse if neither are set. This allows
      // helpers to do a check for `if (options.fn)`
      if (program || inverse) {
        if (!program) {
          this.context.aliases.self = "this";
          program = "self.noop";
        }

        if (!inverse) {
          this.context.aliases.self = "this";
          inverse = "self.noop";
        }

        options.push("inverse:" + inverse);
        options.push("fn:" + program);
      }

      for(var i=0; i<paramSize; i++) {
        param = this.popStack();
        params.push(param);

        if(this.options.stringParams) {
          types.push(this.popStack());
          contexts.push(this.popStack());
        }
      }

      if (this.options.stringParams) {
        options.push("contexts:[" + contexts.join(",") + "]");
        options.push("types:[" + types.join(",") + "]");
      }

      if(this.options.data) {
        options.push("data:data");
      }

      return options;
    },

    // the params and contexts arguments are passed in arrays
    // to fill in
    setupParams: function(paramSize, params, useRegister) {
      var options = '{' + this.setupOptions(paramSize, params).join(',') + '}';

      if (useRegister) {
        this.useRegister('options');
        params.push('options');
        return 'options=' + options;
      } else {
        params.push(options);
        return '';
      }
    }
  };

  var reservedWords = (
    "break else new var" +
    " case finally return void" +
    " catch for switch while" +
    " continue function this with" +
    " default if throw" +
    " delete in try" +
    " do instanceof typeof" +
    " abstract enum int short" +
    " boolean export interface static" +
    " byte extends long super" +
    " char final native synchronized" +
    " class float package throws" +
    " const goto private transient" +
    " debugger implements protected volatile" +
    " double import public let yield"
  ).split(" ");

  var compilerWords = JavaScriptCompiler.RESERVED_WORDS = {};

  for(var i=0, l=reservedWords.length; i<l; i++) {
    compilerWords[reservedWords[i]] = true;
  }

  JavaScriptCompiler.isValidJavaScriptVariableName = function(name) {
    if(!JavaScriptCompiler.RESERVED_WORDS[name] && /^[a-zA-Z_$][0-9a-zA-Z_$]*$/.test(name)) {
      return true;
    }
    return false;
  };

  __exports__ = JavaScriptCompiler;
  return __exports__;
})(__module2__, __module5__);

// handlebars.js
var __module0__ = (function(__dependency1__, __dependency2__, __dependency3__, __dependency4__, __dependency5__) {
  "use strict";
  var __exports__;
  /*globals Handlebars: true */
  var Handlebars = __dependency1__;

  // Compiler imports
  var AST = __dependency2__;
  var Parser = __dependency3__.parser;
  var parse = __dependency3__.parse;
  var Compiler = __dependency4__.Compiler;
  var compile = __dependency4__.compile;
  var precompile = __dependency4__.precompile;
  var JavaScriptCompiler = __dependency5__;

  var _create = Handlebars.create;
  var create = function() {
    var hb = _create();

    hb.compile = function(input, options) {
      return compile(input, options, hb);
    };
    hb.precompile = function (input, options) {
      return precompile(input, options, hb);
    };

    hb.AST = AST;
    hb.Compiler = Compiler;
    hb.JavaScriptCompiler = JavaScriptCompiler;
    hb.Parser = Parser;
    hb.parse = parse;

    return hb;
  };

  Handlebars = create();
  Handlebars.create = create;

  __exports__ = Handlebars;
  return __exports__;
})(__module1__, __module7__, __module8__, __module10__, __module11__);

  return __module0__;
})();


(function($){
  $.fn.spotlightSearchTypeAhead = function( options ) {
    $.each(this, function(){
      addAutocompleteBehavior($(this));
    });
    function addAutocompleteBehavior( typeAheadInput ) {
      results = initBloodhound();
      var settings = $.extend({
        highlight: (typeAheadInput.data('autocomplete-highlight') || true),
        hint: (typeAheadInput.data('autocomplete-hint') || false),
        autoselect: (typeAheadInput.data('autocomplete-autoselect') || true)
      }, options);
      typeAheadInput.typeahead(settings, {
        displayKey: 'title',
        source: results.ttAdapter(),
        templates: {
          suggestion: Handlebars.compile('<div class="document-thumbnail thumbnail"><img src="{{thumbnail}}" /></div>{{title}}<br/><small>&nbsp;&nbsp;{{description}}</small>')
        }
      })
    }
    return this;
  }
  function initBloodhound() {
    results = new Bloodhound({
      datumTokenizer: function(d) { return Bloodhound.tokenizers.whitespace(d.title); },
      queryTokenizer: Bloodhound.tokenizers.whitespace,
      limit: 10,
      remote: {
        url: $('form[data-autocomplete-url]').data('autocomplete-url') + '?q=%QUERY',
        filter: function(response) {
          return $.map(response['docs'], function(doc) {
            return doc;
          })
        }
      }
    });
    results.initialize();
    return results;
  }
})( jQuery );

function addAutocompletetoSirTrevorForm() {
  $('[data-twitter-typeahead]').spotlightSearchTypeAhead().on('click', function() {
    $(this).select();
    $(this).closest('.field').removeClass('has-error');
    $($(this).data('checkbox_field')).prop('disabled', false);
  }).on('change', function() {
    $($(this).data('id_field')).val("");
  }).on('typeahead:selected typeahead:autocompleted', function(e, data) {
    swapInputForPanel($(this), $($(this).data('target-panel')) , data);
  }).on('blur', function() {
    if($(this).val() != "" && $($(this).data('id_field')).val() == "") {
      $(this).closest('.field').addClass('has-error');
      $($(this).data('checkbox_field')).prop('checked', false);
      $($(this).data('checkbox_field')).prop('disabled', true);
    }
  });
}

function addAutocompletetoFeaturedImage() {
  $('[data-featured-item-typeahead]').spotlightSearchTypeAhead().on('click', function() {
    $(this).select();
  }).on('change', function() {
    $($(this).data('id-field')).val("");
  }).on('typeahead:selected typeahead:autocompleted', function(e, data) {
    $($(this).data('id-field')).val(data['id']);
  });
}

function swapInputForPanel(input, panel, data){
  $(".pic.thumbnail img", panel).attr("src", data['thumbnail']).show();
  $("[data-item-grid-thumbnail]", panel).attr('value', data['thumbnail']);
  $("[data-panel-title]", panel).text(data['title']);
  $("[data-panel-id-display]", panel).text(data['id']);

  $(input.data('id_field')).val(data['id']);
  $(input.data('checkbox_field')).prop('checked', true);
  input.attr('type', 'hidden');
  panel.show();
}
function addRemoveAutocompletedPanelBehavior() {
  $("[data-item-grid-panel-remove]").on('click', function(e){
    e.preventDefault();
    var listItem = $(this).closest('li.dd-item');
    var textField = $("[data-target-panel='#" + listItem.attr('id') + "']");
    $("input[type='hidden']", listItem).prop('value', '');
    textField.attr('value', '');
    textField.attr('type', 'text');
    listItem.hide();
  });
}
function replaceName(element, i) {
  element.prop('name', element.prop('name').replace(/\d/, i));
}

Spotlight.onLoad(function(){
  addAutocompletetoFeaturedImage();
});
(function( $ ){

  $.fn.spotlight_users = function( options ) {  

    // Create some defaults, extending them with any options that were provided
    var settings = $.extend( { }, options);
    var container;

    function edit_user(event) {
      event.preventDefault();
      $(this).closest('tr').hide();
      id = $(this).attr('data-target')
      edit_view = $("[data-edit-for='"+id+"']", container).show();
      $.each(edit_view.find('input[type="text"], select'), function() {
        // Cache original values incase editing is canceled
        $(this).data('orig', $(this).val());
      });
    }

    function cancel_edit(event) {
      event.preventDefault();
      id = $(this).closest('tr').attr('data-edit-for');
      edit_view = $("[data-edit-for='"+id+"']", container).hide();
      clear_errors(edit_view);
      rollback_changes(edit_view);
      $("[data-show-for='"+id+"']", container).show();
    }

    function clear_errors(element) {
      element.find('.has-error').removeClass('has-error');
      element.find('.help-block').remove(); // Remove the error messages
    }

    function rollback_changes(element) {
      $.each(element.find('input[type="text"], select'), function() {
        $(this).val($(this).data('orig'));
      });
    }

    function destroy_user(event) {
      id = $(this).attr('data-target')
      $("[data-destroy-for='"+id+"']", container).val('1');
    }

    function new_user(event) {
      event.preventDefault();
      edit_view = $("[data-edit-for='new']", container).show();
      $.each(edit_view.find('input[type="text"], select'), function() {
        // Cache original values incase editing is canceled
        $(this).data('orig', $(this).val());
      });
    }

    function open_errors() {
      edit_row = container.find('.has-error').closest('[data-edit-for]');
      edit_row.show();
      // The following row has the controls, so show it too.
      edit_row.next().show();
    }

    return this.each(function() {        

      container = $(this);
      $('[data-edit-for]', container).hide();
      open_errors();
      $("[data-behavior='edit-user']", container).on('click', edit_user);
      $("[data-behavior='cancel-edit']", container).on('click', cancel_edit);
      $("[data-behavior='destroy-user']", container).on('click', destroy_user);
      $("[data-behavior='new-user']", container).on('click', new_user);
    });
  };
})( jQuery );


Spotlight.onLoad(function() {
  $('.edit_exhibit').spotlight_users();
});
// This is a manifest file that'll be compiled into application.js, which will include all the files
// listed below.
//
// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
// or vendor/assets/javascripts of plugins, if any, can be referenced here using a relative path.
//
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// compiled file.
//
// Read Sprockets README (https://github.com/sstephenson/sprockets#sprockets-directives) for details
// about supported directives.
//


;
// This is a manifest file that'll be compiled into application.js, which will include all the files
// listed below.
//
// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
// or vendor/assets/javascripts of plugins, if any, can be referenced here using a relative path.
//
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// compiled file.
//
// Read Sprockets README (https://github.com/sstephenson/sprockets#sprockets-directives) for details
// about supported directives.
//


//
// Required by Blacklight


;
; TI"required_assets_digest; TI"%781ebdb5f353292ae68ef07add942434; FI"_version; TI"%1005ed9f20e25fb0a0599a7017dd0e6b; F