// TODO: fix all the position: absolute issues caused by getScreenHeight and newResetActivePageHeight. these two need fixin.
// TODO: need to check for tablets performance - using overflow: auto instead of position:fixed. these will probably need fixin as well.

// TODO: reinstate replaceBackBtn - to include the case where people actually really want the back btn
(function($,window,undefined){
  $( window.document ).bind('mobileinit', function(){
    $.mobile = $.extend( {}, {
      menuWidth: '25%',
      menuMinWidth: '250px',
      menuBtnSide: 'left',
    }, $.mobile );

    //some class for css to detect touchscreens
    if($.support.touch){
      $('html').addClass('touch');
    }
    var $query = $.mobile.media('screen and (min-width: 480px)') && ($.mobile.media('(-webkit-max-device-pixel-ratio: 3.0)') || $.mobile.media('(max--moz-device-pixel-ratio: 3.0)'));
    $.support.splitview = ($query || ($.mobile.browser.ie && $(this).width() >= 480)) && $.mobile.ajaxEnabled;
    if ($.support.splitview) {
      $('html').addClass('splitview');
      //on window.ready() execution:
      $(function() {
        // TODO: cleanup if all is ok
        // $.mobile.linkBindingEnabled = false;
        // $(document).unbind('.toolbar');
        // $('.ui-page').off('.toolbar');
        $('div:jqmData(role="panel")').addClass('ui-mobile-viewport ui-panel');
        var firstPageMain=$('div:jqmData(id="main") > div:jqmData(role="page"):first');
        if( !$.mobile.hashListeningEnabled || !$.mobile.path.stripHash( location.hash ) ){
          var $container=$('div:jqmData(id="main")');
          $.mobile.firstPage = firstPageMain;
          $.mobile.pageContainer = $container;
          $(window).trigger('pagecontainercreate');
          $.mobile.changePage(firstPageMain, {transition:'none', changeHash:false, pageContainer:$container});
          $.mobile.activePage=undefined;
        } //no need to trigger a hashchange here cause the other page is handled by core.

        // setup the layout for splitview and jquerymobile will handle first page init
        $(window).trigger('orientationchange');
        setTimeout(function(){
          $.mobile.firstPage = firstPageMain;
        }, 100)
      }); //end window.ready()

//----------------------------------------------------------------------------------
//Main event bindings: click, form submits, hashchange and orientationchange/resize(popover)
//----------------------------------------------------------------------------------
      //existing base tag?
      var $window = $( window ),
          $html = $( 'html' ),
          $head = $( 'head' ),
          $base = $head.children( "base" ),
          $activeClickedLink = null,
          //tuck away the original document URL minus any fragment.
          documentUrl = $.mobile.path.parseUrl( location.href ),

          //if the document has an embedded base tag, documentBase is set to its
          //initial value. If a base tag does not exist, then we default to the documentUrl.
          documentBase = $base.length ? $.mobile.path.parseUrl( $.mobile.path.makeUrlAbsolute( $base.attr( "href" ), documentUrl.href ) ) : documentUrl,
          getScreenHeight = $.mobile.getScreenHeight;

      //remove active classes after page transition or error
      function removeActiveLinkClass( forceRemoval ) {
        if ( !!$activeClickedLink && ( !$activeClickedLink.closest( "." + $.mobile.activePageClass ).length || forceRemoval ) ) {
          $activeClickedLink.removeClass( $.mobile.activeBtnClass );
        }
        $activeClickedLink = null;
      }

      function findClosestLink(ele)
      {
        while (ele){
          if ( ( typeof ele.nodeName === "string") && ele.nodeName.toLowerCase() == "a"){
            break;
          }
          ele = ele.parentNode;
        }
        return ele;
      }

      // The base URL for any given element depends on the page it resides in.
      function getClosestBaseUrl( ele )
      {
        // Find the closest page and extract out its url.
        var url = $( ele ).closest( ".ui-page" ).jqmData( "url" ),
          base = documentBase.hrefNoHash;

        if ( !url || !$.mobile.path.isPath( url ) ) {
          url = base;
        }

        return $.mobile.path.makeUrlAbsolute( url, base);
      }

      function ResetActivePageHeight(container){
        var aPage;
            // aPagePadT = parseFloat( aPage.css( "padding-top" ) ),
            // aPagePadB = parseFloat( aPage.css( "padding-bottom" ) ),
            // aPageBorderT = parseFloat( aPage.css( "border-top-width" ) ),
            // aPageBorderB = parseFloat( aPage.css( "border-bottom-width" ) );

        if(container !== null && typeof container !== 'undefined') {
          aPage = container.find("." + $.mobile.activePageClass);
        } else {
          aPage = $( "." + $.mobile.activePageClass );
        }

        aPage.each(function(i, page){
          page = $(page)
          var pagePadT = parseFloat( page.css( "padding-top" )),
              pagePadB = parseFloat( page.css( "padding-bottom" )),
              pageBorderT = parseFloat( page.css( "border-top-width" )),
              pageBorderB = parseFloat( page.css( "border-bottom-width" ));
          page.css( "min-height", getScreenHeight() - pagePadT - pagePadB - pageBorderT - pageBorderB );
        })
      }

      //override _registerInternalEvents to bind to new methods below
      $.mobile._registerInternalEvents = function(){
        //DONE: bind form submit with this plugin
        $( document ).delegate("form", "submit", function(event){
          var $this = $( this );

          if( !$.mobile.ajaxEnabled ||
              $this.is( ":jqmData(ajax='false')" ) ||
              !$this.jqmHijackable().length ){
            return;
          }

          var type = $this.attr("method"),
              target = $this.attr("target"),
              url = $this.attr( "action" );

          // If the form has a data-panel attribute, load the page in that panel instead.
          var $targetPanel = null;
          var $targetPanelId = $this.jqmData("panel");
          if ($targetPanelId === undefined) {
              $targetPanel = $this.parents('div:jqmData(role="panel")');
          } else {
              $targetPanel = $('div:jqmData(id="' + $targetPanelId + '")');
          }
          var $targetPanelActivePage=$targetPanel.children('div.'+$.mobile.activePageClass);

          // If no action is specified, browsers default to using the
          // URL of the document containing the form. Since we dynamically
          // pull in pages from external documents, the form should submit
          // to the URL for the source document of the page containing
          // the form.
          if ( !url ) {
            // Get the @data-url for the page containing the form.
            url = getClosestBaseUrl( $this );
            if ( url === documentBase.hrefNoHash ) {
              // The url we got back matches the document base,
              // which means the page must be an internal/embedded page,
              // so default to using the actual document url as a browser
              // would.
              url = documentUrl.hrefNoSearch;
            }
          }

          url = $.mobile.path.makeUrlAbsolute(  url, getClosestBaseUrl($this) );

          //external submits use regular HTTP
          if( ( $.mobile.path.isExternal( url ) && !path.isPermittedCrossDomainRequest( documentUrl, url ) ) || target ) {
            return;
          }

          //temporarily put this here- eventually shud just set it immediately instead of an interim var.
          $.mobile.activePage=$targetPanelActivePage;
          // $.mobile.pageContainer=$targetPanel;
          $.mobile.changePage(
              url,
              {
                type:       type && type.length && type.toLowerCase() || "get",
                data:       $this.serialize(),
                transition: $this.jqmData("transition"),
                reverse:  $this.jqmData("direction") === "reverse",
                reloadPage: true,
                pageContainer:$targetPanel
              }
          );
          event.preventDefault();
        });

        //add active state on vclick

        $( document ).bind( "vclick", function( event ) {
          if ( event.which > 1 || !$.mobile.linkBindingEnabled ) {
            return;
          }

          var link = findClosestLink( event.target );

          if ( !$( link ).jqmHijackable().length ) {
            return;
          }

          if ( link ) {
            if ( $.mobile.path.parseUrl( link.getAttribute( "href" ) || "#" ).hash !== "#" ) {
              removeActiveLinkClass( true );
              $activeClickedLink = $( link ).closest( ".ui-btn" ).not( ".ui-disabled" )
              $activeClickedLink.addClass( $.mobile.activeBtnClass );
              // $( "." + $.mobile.activePageClass + " .ui-btn" ).not( link ).blur();
            }
          }
        });

        //DONE: link click event binding for changePage
        //click routing - direct to HTTP or Ajax, accordingly
        $(document).bind( "click", function(event) {
          if ( !$.mobile.linkBindingEnabled ) {
            return;
          }

          var link = findClosestLink(event.target),
              $link = $( link ),
              httpCleanup;

          if (!link || event.which > 1 || !$link.jqmHijackable().length ){
            return;
          }

          httpCleanup = function() {
            window.setTimeout(function() { removeActiveLinkClass( true ); })
          }

          //if there's a data-rel=back attr, go back in history
          if( $link.is( ":jqmData(rel='back')" ) ) {
            $.mobile.back();
            return false;
          }

          var baseUrl = getClosestBaseUrl( $link ),

              //get href, if defined, otherwise fall to null #
              href = $.mobile.path.makeUrlAbsolute( $link.attr( "href" ) || "#", baseUrl );



          //if ajax is disabled, exit early
          if( !$.mobile.ajaxEnabled && !$.mobile.path.isEmbeddedPage( href ) ) {
            httpCleanup();
            //use default click handling
            return;
          }

          // XXX_jblas: Ideally links to application pages should be specified as
          //            an url to the application document with a hash that is either
          //            the site relative path or id to the page. But some of the
          //            internal code that dynamically generates sub-pages for nested
          //            lists and select dialogs, just write a hash in the link they
          //            create. This means the actual URL path is based on whatever
          //            the current value of the base tag is at the time this code
          //            is called. For now we are just assuming that any url with a
          //            hash in it is an application page reference.
          if ( href.search( "#" ) !== -1 ) {
            href = href.replace( /[^#]*#/, "" );
            if ( !href ) {
              //link was an empty hash meant purely
              //for interaction, so we ignore it.
              event.preventDefault();
              return;
            } else if ( $.mobile.path.isPath( href ) ) {
              //we have apath so make it the href we want to load.
              href = $.mobile.path.makeUrlAbsolute( href, baseUrl );
            } else {
              //we have a simple id so use the documentUrl as its base.
              href = $.mobile.path.makeUrlAbsolute( "#" + href, documentUrl.hrefNoHash );
            }
          }

          // Should we handle this link, or let the browser deal with it?
          var useDefaultUrlHandling = $link.is( "[rel='external']" ) || $link.is( ":jqmData(ajax='false')" ) || $link.is( "[target]" ),
              // Some embedded browsers, like the web view in Phone Gap, allow cross-domain XHR
              // requests if the document doing the request was loaded via the file:// protocol.
              // This is usually to allow the application to "phone home" and fetch app specific
              // data. We normally let the browser handle external/cross-domain urls, but if the
              // allowCrossDomainPages option is true, we will allow cross-domain http/https
              // requests to go through our page loading logic.
              //isCrossDomainPageLoad = ( $.mobile.allowCrossDomainPages && documentUrl.protocol === "file:" && href.search( /^https?:/ ) != -1 ),

              //check for protocol or rel and its not an embedded page
              //TODO overlap in logic from isExternal, rel=external check should be
              //     moved into more comprehensive isExternalLink
              isExternal = useDefaultUrlHandling || ( $.mobile.path.isExternal( href ) && !$.mobile.path.isPermittedCrossDomainRequest( documentUrl, href ) ),

              isRefresh=$link.jqmData('refresh'),
              $targetPanel=$link.jqmData('panel'),
              $targetContainer=$('div:jqmData(id="'+$targetPanel+'")'),
              $targetPanelActivePage=$targetContainer.children('div.'+$.mobile.activePageClass),
              $currPanel=$link.parents('div:jqmData(role="panel")'),
              //not sure we need this. if you want the container of the element that triggered this event, $currPanel
              $currContainer=$.mobile.pageContainer,
              $currPanelActivePage=$currPanel.children('div.'+$.mobile.activePageClass),
              url=$.mobile.path.stripHash($link.attr("href")),
              from = null;

          //still need this hack apparently:
          $('.ui-btn.'+$.mobile.activeBtnClass).removeClass($.mobile.activeBtnClass);
          $activeClickedLink = $link.closest( ".ui-btn" ).addClass($.mobile.activeBtnClass);

          if( isExternal ) {
            httpCleanup();
            //use default click handling
            return;
          }

          //use ajax
          var transitionVal = $link.jqmData( "transition" ),
              reverseVal = $link.jqmData("direction") === "reverse" ||
                        // deprecated - remove by 1.0
                        $link.jqmData( "back" ),
              //this may need to be more specific as we use data-rel more
              role = $link.attr( "data-" + $.mobile.ns + "rel" ) || undefined,
              hash = $currPanel.jqmData('hash');

          //if link refers to an already active panel, stop default action and return
          if ($targetPanelActivePage.attr('data-url') == url || $currPanelActivePage.attr('data-url') == url) {
            if (isRefresh) { //then changePage below because it's a pageRefresh request
              $.mobile.changePage(href, {fromPage:from, transition:'fade', reverse:reverseVal, changeHash:false, pageContainer:$targetContainer, reloadPage:isRefresh, role:role, link:$link});
            }
            else { //else preventDefault and return
              event.preventDefault();
              return;
            }
          }
          //if link refers to a page on another panel, changePage on that panel
          else if ($targetPanel && $targetPanel!=$link.parents('div:jqmData(role="panel")')) {
            var from=$targetPanelActivePage;
            $.mobile.pageContainer=$targetContainer;
            $.mobile.changePage(href, {fromPage:from, transition:transitionVal, reverse:reverseVal, pageContainer:$targetContainer, role:role, link:$link});
          }
          //if link refers to a page inside the same panel, changePage on that panel
          else {
            var from=$currPanelActivePage;
            $.mobile.pageContainer=$currPanel;
            var hashChange= (hash == 'false' || hash == 'crumbs')? false : true;
            $.mobile.changePage(href, {fromPage:from, transition:transitionVal, reverse:reverseVal, changeHash:hashChange, pageContainer:$currPanel, role: role, link: $link});
            //active page must always point to the active page in main - for history purposes.
            $.mobile.activePage=$('div:jqmData(id="main") > div.'+$.mobile.activePageClass);
          }
          event.preventDefault();
          event.stopPropagation();
        });

        //prefetch pages when anchors with data-prefetch are encountered
        //TODO: insert pageContainer in here!
        $( document ).delegate( ".ui-page", "pageshow.prefetch", function(){
          var urls = [],
              $thisPageContainer = $(this).parents('div:jqmData(role="panel")');
          $( this ).find( "a:jqmData(prefetch)" ).each(function(){
            var url = $( this ).attr( "href" ),
                panel = $(this).jqmData('panel'),
                container = panel.length? $('div:jqmData(id="'+panel+'")') : $thisPageContainer;
            if ( url && $.inArray( url, urls ) === -1 ) {
              urls.push( url );
              $.mobile.loadPage( url, {pageContainer: container} );
            }
          });
        });

        //DONE: bind hashchange with this plugin
        //hashchanges are defined only for the main panel - other panels should not support hashchanges to avoid ambiguity
        $.mobile._handleHashChange = function( hash ) {
          var to = $.mobile.path.stripHash( hash ),
              transition = $.mobile.urlHistory.stack.length === 0 ? "none" : undefined,
              navEvent = new $.Event( "navigate" ),
              $mainPanel=$('div:jqmData(id="main")'),
              $mainPanelFirstPage=$mainPanel.children('div:jqmData(role="page"):first'),
              $mainPanelActivePage=$mainPanel.children('div.ui-page-active'),
              $menuPanel=$('div:jqmData(id="menu")'),
              $menuPanelFirstPage=$menuPanel.children('div:jqmData(role="page"):first'),
              $menuPanelActivePage=$menuPanel.children('div.ui-page-active'),
              //FIX: temp var for dialogHashKey
              dialogHashKey = "&ui-state=dialog",

              // default options for the changPage calls made after examining the current state
              // of the page and the hash
              changePageOptions = {
                transition: transition,
                changeHash: false,
                fromHashChange: true,
                pageContainer: $mainPanel
              };

          if ( 0 === $.mobile.urlHistory.stack.length ) {
            $.mobile.urlHistory.initialDst = to;
          }

          // We should probably fire the "navigate" event from those places that make calls to _handleHashChange,
          // and have _handleHashChange hook into the "navigate" event instead of triggering it here
          $.mobile.pageContainer.trigger( navEvent );
          if ( navEvent.isDefaultPrevented() ) {
            return;
          }

          if( !$.mobile.hashListeningEnabled || $.mobile.urlHistory.ignoreNextHashChange ){
            $.mobile.urlHistory.ignoreNextHashChange = false;
            return;
          }

          // special case for dialogs
          if( $.mobile.urlHistory.stack.length > 1 && to.indexOf( dialogHashKey ) > -1 && $.mobile.urlHistory.initialDst !== to ) {

            // If current active page is not a dialog skip the dialog and continue
            // in the same direction
            if(!$.mobile.activePage.is( ".ui-dialog" )) {
              //determine if we're heading forward or backward and continue accordingly past
              //the current dialog
              $.mobile.urlHistory.directHashChange({
                currentUrl: to,
                isBack: function() { window.history.back(); },
                isForward: function() { window.history.forward(); }
              });

              // prevent changepage
              return;
            } else {
              // var setTo = function() { to = $.mobile.urlHistory.getActive().pageUrl; };
              // if the current active page is a dialog and we're navigating
              // to a dialog use the dialog objected saved in the stack
              // urlHistory.directHashChange({ currentUrl: to, isBack: setTo, isForward: setTo });
              urlHistory.directHashChange({
                currentUrl: to,

                // regardless of the direction of the history change
                // do the following
                either: function( isBack ) {
                  var active = $.mobile.urlHistory.getActive();

                  to = active.pageUrl;

                  // make sure to set the role, transition and reversal
                  // as most of this is lost by the domCache cleaning
                  $.extend( changePageOptions, {
                    role: active.role,
                    transition:  active.transition,
                    reverse: isBack
                  });
                }
              });
            }
          }

          //if to is defined, load it
          if ( to ){
            to = ( typeof to === "string" && !$.mobile.path.isPath( to ) ) ? ( $.mobile.path.makeUrlAbsolute( '#' + to, documentBase ) ) : to;
            //if this is initial deep-linked page setup, then changePage sidemenu as well
            if (!$('div.ui-page-active').length) {
              $menuPanelFirstPage='#'+$menuPanelFirstPage.attr('id');
              $.mobile.changePage($menuPanelFirstPage, {transition:'none', reverse:true, changeHash:false, fromHashChange:false, pageContainer:$menuPanel});
              $.mobile.activePage=undefined;
            }
            $.mobile.activePage=$mainPanelActivePage.length? $mainPanelActivePage : undefined;
            $.mobile.changePage(to, changePageOptions );
          } else {
          //there's no hash, go to the first page in the main panel.
            $.mobile.activePage=$mainPanelActivePage? $mainPanelActivePage : undefined;
            $.mobile.changePage( $mainPanelFirstPage, changePageOptions );
          }
        };

        //hashchange event handler
        $(window).bind( "hashchange", function( e, triggered ) {
          $.mobile._handleHashChange( location.hash );
        });

        //set page min-heights to be device specific
        $( document ).bind( "pageshow.resetPageHeight", function(e){
          var container = $(e.target).parents('div:jqmData(role="panel")');
          ResetActivePageHeight(container);
        });
        $( window ).bind( "throttledresize.resetPageHeight", ResetActivePageHeight() );

      }; //end _registerInternalEvents

      //DONE: bind orientationchange and resize - the popover
      _orientationHandler = function(event){
        var $menu=$('div:jqmData(id="menu")'),
            $main=$('div:jqmData(id="main")'),
            $mainHeader=$main.find('div.'+$.mobile.activePageClass+'> div:jqmData(role="header")'),
            $window=$(window);

        function popoverBtn(header) {
          if(!header.children('.popover-btn').length){
            if(header.children('a.ui-btn-'+$.mobile.menuBtnSide).length){
              header.children('a.ui-btn-'+$.mobile.menuBtnSide).replaceWith('<a class="popover-btn">Menu</a>');
              header.children('a.popover-btn').addClass('ui-btn-'+$.mobile.menuBtnSide).buttonMarkup();
            }
            else{
              header.prepend('<a class="popover-btn">Menu</a>');
              header.children('a.popover-btn').addClass('ui-btn-'+$.mobile.menuBtnSide).buttonMarkup()
            }
          }
        }

        function replaceBackBtn(header) {
          if($.mobile.urlHistory.stack.length > 1 && !header.children('a:jqmData(rel="back")').length && header.jqmData('backbtn')!=false){
            header.prepend("<a href='#' class='ui-btn-left' data-"+ $.mobile.ns +"rel='back' data-"+ $.mobile.ns +"icon='arrow-l'>Back</a>" );
            header.children('a:jqmData(rel="back")').buttonMarkup();
          }
        };

        function popover(){
          $menu.addClass('panel-popover')
               .removeClass('ui-panel-left')
               .css({'width':$.mobile.menuWidth, 'min-width':$.mobile.menuMinWidth, 'display':'', 'overflow-x':'visible'})
               .css($.mobile.menuBtnSide, '10px');
          if(!$menu.children('.popover_triangle').length){
            $menu.prepend('<div class="popover_triangle" style="'+$.mobile.menuBtnSide+':7px"></div>');
          }
          $menu.children('div:jqmData(role="page")').css('min-height', '100%');
          $main.removeClass('ui-panel-right')
               .css('width', '');
          popoverBtn($mainHeader);

          $main.undelegate('div:jqmData(role="page")', 'pagebeforeshow.splitview');
          $main.delegate('div:jqmData(role="page")','pagebeforeshow.popover', function(){
            var $thisHeader=$(this).children('div:jqmData(role="header")');
            popoverBtn($thisHeader);
          });
          $( document ).unbind('pageshow.resetPageHeight');
          // TODO: unbind resetActivePageHeight for popover pages

        };

        function splitView(){
          $menu.removeClass('panel-popover')
               .addClass('ui-panel-left')
               .css({'width':$.mobile.menuWidth, 'min-width':$.mobile.menuMinWidth, 'display':''});
          $menu.children('.popover_triangle').remove();
          $main.addClass('ui-panel-right')
               .width(function(){
                 return $(window).width()-$('div:jqmData(id="menu")').width();
               });
          $mainHeader.children('.popover-btn').remove();

          // replaceBackBtn($mainHeader);

          $main.undelegate('div:jqmData(role="page")', 'pagebeforeshow.popover');
          $main.delegate('div:jqmData(role="page")', 'pagebeforeshow.splitview', function(){
            var $thisHeader=$(this).children('div:jqmData(role="header")');
            $thisHeader.children('.popover-btn').remove();
            // replaceBackBtn($thisHeader);
          });

        }

        if(event.orientation){
          if(event.orientation == 'portrait'){
            popover();
          }
          else if(event.orientation == 'landscape') {
            splitView();
          }
        }
        else if($window.width() < 1280 && $window.width() > 480){
          popover();
        }
        else if($window.width() > 1280){
          splitView();
        }
      };

      $(window).bind('orientationchange', _orientationHandler);
      $(window).bind('throttledresize', _orientationHandler);

      //popover button click handler - from http://www.cagintranet.com/archive/create-an-ipad-like-dropdown-popover/
      $(document).on('click', '.popover-btn', function(e){
        e.preventDefault();
        $('.panel-popover').fadeToggle('fast');
        if ($('.popover-btn').hasClass($.mobile.activeBtnClass)) {
            $('.popover-btn').removeClass($.mobile.activeBtnClass);
        } else {
            $('.popover-btn').addClass($.mobile.activeBtnClass);
        }
      });

      $(document).on('click', 'body', function(event) {
        if (!$(event.target).closest('.panel-popover').length && !$(event.target).closest('.popover-btn').length) {
            $(".panel-popover").stop(true, true).hide();
            $('.popover-btn').removeClass($.mobile.activeBtnClass);
        };
      });


//----------------------------------------------------------------------------------
//Other event bindings: scrollview, crumbs, data-context and content height adjustments
//----------------------------------------------------------------------------------

      // TODO:cleanup if all is ok
      // DONE: pageshow binding for scrollview - now using IScroll4! hell yeah!
      // $('div:jqmData(role="page")').live('pagebeforeshow.scroll', function(event, ui){
      //   if ($.support.touch && !$.support.touchOverflow) {

      //     var $page = $(this),
      //         $scrollArea = $page.find('div:jqmData(role="content")');
      //         $scrAreaChildren = $scrollArea.children();

      //     if ($scrAreaChildren.length > 1) {
      //       $scrAreaChildren = $scrollArea.wrapInner("<div class='scrollable vertical'></div>").children();
      //     }
      //     $scrollArea.css({ 'width':'auto',
      //                       'height':'auto',
      //                       'overflow':'hidden'});
      //     //TODO: if too many pages are in the DOM that have iscroll on, this might slow down the browser significantly,
      //     //in which case we'll need to destroy() the iscroll as the page hides.
      //     $scrollArea.iscroll();
      //   }
      // });

      //data-hash 'crumbs' handler
      //now that data-backbtn is no longer defaulting to true, lets set crumbs to create itself even when backbtn is not available
      $(document).on("pagebeforeshow.crumbs", 'div:jqmData(role="page")', function(event, data){
        var $this = $(this);
        if($this.jqmData('hash') == 'crumbs' || $this.parents('div:jqmData(role="panel")').data('hash') == 'crumbs'){
          if($this.jqmData('hash')!=false && $this.find('.ui-crumbs').length < 1){
            var $header=$this.find('div:jqmData(role="header")');
              backBtn = $this.find('a:jqmData(rel="back")');

            if(data.prevPage.jqmData('url') == $this.jqmData('url')){  //if it's a page refresh
              var prevCrumb = data.prevPage.find('.ui-crumbs');
              crumbify(backBtn, prevCrumb.attr('href'), prevCrumb.find('.ui-btn-text').html());
            }
            else if($.mobile.urlHistory.stack.length > 0) {
              var text = data.prevPage.find('div:jqmData(role="header") .ui-title').html();
              crumbify(backBtn, '#'+data.prevPage.jqmData('url'), text);
            }
            else if(backBtn.length && $.mobile.urlHistory.stack.length <= 1) {
              backBtn.remove();
            }
          }
        }

          function crumbify(button, href, text){
            if(!button.length) {
              $this.find('div:jqmData(role="header")').prepend('<a class="ui-crumbs ui-btn-left" data-icon="arrow-l"></a>');
              button=$header.children('.ui-crumbs').buttonMarkup();
            }
            button.removeAttr('data-rel')
                  .jqmData('direction','reverse')
                  .addClass('ui-crumbs')
                  .attr('href',href);
            button.find('.ui-btn-text').html(text);
          }
      });

      //data-context handler - a page with a link that has a data-context attribute will load that page after this page loads
      //this still needs work - pageTransitionQueue messes everything up.
      $(document).on('pagechange.context', 'div:jqmData(role="panel")', function(){
        var $this=$(this),
            $currPanelActivePage = $this.children('.' + $.mobile.activePageClass),
            panelContextSelector = $this.jqmData('context'),
            pageContextSelector = $currPanelActivePage.jqmData('context'),
            contextSelector= pageContextSelector ? pageContextSelector : panelContextSelector;
        //if you pass a hash into data-context, you need to specify panel, url and a boolean value for refresh
        if($.type(contextSelector) === 'object') {
          var $targetContainer=$('div:jqmData(id="'+contextSelector.panel+'")'),
              $targetPanelActivePage=$targetContainer.children('div.'+$.mobile.activePageClass),
              isRefresh = contextSelector.refresh === undefined ? false : contextSelector.refresh;
          if(($targetPanelActivePage.jqmData('url') == contextSelector.url && contextSelector.refresh)||(!contextSelector.refresh && $targetPanelActivePage.jqmData('url') != contextSelector.url)){
              $.mobile.changePage(contextSelector.url, options={transition:'fade', changeHash:false, pageContainer:$targetContainer, reloadPage:isRefresh});
          }
        }
        else if(contextSelector && $currPanelActivePage.find(contextSelector).length){
          $currPanelActivePage.find(contextSelector).trigger('click');
        }
      });

      //TODO: cleanup if all is ok
      // this measures the height of header and footer and sets content to the appropriate height so
      // that no content is concealed behind header and footer
      // $('div:jqmData(role="page")').live('pageshow.contentHeight', function(){
      //   var $this=$(this),
      //       $header=$this.children(':jqmData(role="header")'),
      //       $footer=$this.children(':jqmData(role="footer")'),
      //       thisHeaderHeight=$header.css('display') == 'none' ? 0 : $header.outerHeight(),
      //       thisFooterHeight=$footer.css('display') == 'none' ? 0 : $footer.outerHeight();
      //   // $this.children(':jqmData(role="content")').css({'top':thisHeaderHeight, 'bottom':thisFooterHeight});
      // })

      //this allows panels to change their widths upon changepage - useful for pages that need a different width than the ones provided.
      // $('div:jqmData(role="page")').live('')
    }
    else {
      //removes all panels so the page behaves like a single panel jqm
      $(function(){
        $('div:jqmData(role="panel")').each(function(){
          var $this = $(this);
          $this.replaceWith($this.html());
        })
      });
    }
  });
})(jQuery,window);