// Event.onDOMReady for Prototype
// by Vivabit via Dean Edwards:
// http://dean.edwards.name/weblog/2006/06/again/

Object.extend(Event, {
  _domReady : function() {
    if (arguments.callee.done) return;
    arguments.callee.done = true;
    if (this._timer) clearInterval(this._timer);
    this._readyCallbacks.each(function(f) { f() });
    this._readyCallbacks = null;
  },
  
  onDOMReady : function(f) {
    if (!this._readyCallbacks) {
      var domReady = this._domReady.bind(this);
      if (document.addEventListener)
        document.addEventListener("DOMContentLoaded", domReady, false);
      /*@cc_on @*/
      /*@if (@_win32)
          document.write("<script id=__ie_onload defer src=javascript:void(0)><\/script>");
          document.getElementById("__ie_onload").onreadystatechange = function() {
              if (this.readyState == "complete") domReady(); 
          };
      /*@end @*/
      if (/WebKit/i.test(navigator.userAgent)) { 
        this._timer = setInterval(function() {
          if (/loaded|complete/.test(document.readyState)) domReady(); 
        }, 10);
      }
      Event.observe(window, 'load', domReady);
      Event._readyCallbacks =  [];
    }
    Event._readyCallbacks.push(f);
  }
});