/**

* domready.js

*

* Cross browser mozilla's 'onDOMContentLoaded' implementation.

* Executes a function when the dom tree is loaded without waiting for images.

*

* Based on +Element.Events.domready+ from Mootools open source project,

* this tiny javascript library adds the emulated 'DOMContentLoaded' functionality.

*

* Features:

* - No dependency on external libraries

* - Compatible with Prototype.js

*

* Tested browsers (Windows):

* - IE 7 (XP standalone)

* - IE 6 SP2

* - Firefox 2.0.0.4

* - Opera 9.21

*

* Tested browsers (Mac OS X):

* - Safari 2.0.4

* - Firefox 2.0.0.4

* - Mac Opera 9.21

* - Mac IE 5.2.3

*

* Copyright (c) 2007 Takanori Ishikawa.

* License: MIT-style license.

*

* MooTools Copyright:

* copyright (c) 2007 Valerio Proietti, <http://mad4milk.net>

*

*

* See Also:

*

* mootools

* http://mootools.net/

*

* The window.onload Problem - Solved!

* http://dean.edwards.name/weblog/2005/09/busted/

*

* [PATCH] Faster onload for Event.onload

* http://dev.rubyonrails.org/ticket/5414

* Changeset 6596: Support for "DOMContentLoaded" event handling (prototype.js event branch)

* http://dev.rubyonrails.org/changeset/6596

*

*/





if (typeof Event == 'undefined') Event = new Object();





/*

* Registers function +fn+ will be executed when the dom

* tree is loaded without waiting for images.

*

* Example:

*

* Event.domReady.add(function() {

* ...

* });

*

*/





Event.domReady = {

	add: function(fn) {

		//-----------------------------------------------------------

		// Already loaded?

		//-----------------------------------------------------------

    	if (Event.domReady.loaded) return fn();



		//-----------------------------------------------------------

		// Observers

		//-----------------------------------------------------------

		var observers = Event.domReady.observers;

		if (!observers) observers = Event.domReady.observers = [];

		// Array#push is not supported by Mac IE 5

		observers[observers.length] = fn;

       

		//-----------------------------------------------------------

		// domReady function

		//-----------------------------------------------------------

		if (Event.domReady.callback) return;

		Event.domReady.callback = function() {

			if (Event.domReady.loaded) return;

			

			Event.domReady.loaded = true;

			if (Event.domReady.timer) {

				clearInterval(Event.domReady.timer);

				Event.domReady.timer = null;

			}

   

			var observers = Event.domReady.observers;

			for (var i = 0, length = observers.length; i < length; i++) {

				var fn = observers[i];

				observers[i] = null;

				fn(); // make 'this' as window

			}

			Event.domReady.callback = Event.domReady.observers = null;

		};

       

		//-----------------------------------------------------------

		// Emulates 'onDOMContentLoaded'

		//-----------------------------------------------------------

		var ie = !!(window.attachEvent && !window.opera);

		var webkit = navigator.userAgent.indexOf('AppleWebKit/') > -1;

       

		if (document.readyState && webkit) {

       

			// Apple WebKit (Safari, OmniWeb, ...)

			Event.domReady.timer = setInterval(function() {

				var state = document.readyState;

				if (state == 'loaded' || state == 'complete') {

					Event.domReady.callback();

				}

			}, 50);

       

		} else if (document.readyState && ie) {

       

			// Windows IE

			var src = (window.location.protocol == 'https:') ? '://0' : 'javascript:void(0)';

			document.write(

				'<script type="text/javascript" defer="defer" src="' + src + '" ' +

				'onreadystatechange="if (this.readyState == \'complete\') Event.domReady.callback();"' +

				'><\/script>');

       

		} else {

       

			if (window.addEventListener) {

				// for Mozilla browsers, Opera 9

				document.addEventListener("DOMContentLoaded", Event.domReady.callback, false);

				// Fail safe

				window.addEventListener("load", Event.domReady.callback, false);

			} else if (window.attachEvent) {

				window.attachEvent('onload', Event.domReady.callback);

			} else {

				// Legacy browsers (e.g. Mac IE 5)

				var fn = window.onload;

				window.onload = function() {

					Event.domReady.callback();

					if (fn) fn();

				}

			}

       

		}

       

	}

}







/*

if(!window.domReady) domReady = new Object();

domReady.loaded = false;

domReady.timer = null;

domReady.observers = new Array();

//-----------------------------------------------------------

// Add Functions

//-----------------------------------------------------------

domReady.add = function(fn){

	//-----------------------------------------------------------

	// Already loaded?

	//-----------------------------------------------------------

	if(domReady.loaded) return fn();

	

	//-----------------------------------------------------------

	// Observers

	//-----------------------------------------------------------

	domReady.observers[domReady.observers.length] = fn;

}

//-----------------------------------------------------------

// Caller

//-----------------------------------------------------------

domReady.callback = function(){

	if (domReady.loaded) return;

	domReady.loaded = true;

	

	if (domReady.timer) {

		clearInterval(domReady.timer);

		domReady.timer = null;

	}

	

	var length = domReady.observers.length;

	for (var i = 0; i < length; i++) {

		var fn = domReady.observers[i];

		fn();

	}

}





//-----------------------------------------------------------

// Emulates 'onDOMContentLoaded'

//-----------------------------------------------------------

var domR_ie = !!(window.attachEvent && !window.opera);

var domR_webkit = navigator.userAgent.indexOf('AppleWebKit/') > -1;



if ( document.addEventListener && )

/*

if (document.readyState && domR_webkit) {



	// Apple WebKit (Safari, OmniWeb, ...)

	domReady.timer = setInterval(function() {

		var state = document.readyState;

		if (state == 'loaded' || state == 'complete') {

			domReady.callback();

		}

	}, 50);



} else if (document.readyState && domR_ie) {



	// Windows IE

	var src = (window.location.protocol == 'https:') ? '://0' : 'javascript:void(0)';

	document.write(

		'<script type="text/javascript" defer="defer" src="' + src + '" ' +

		'onreadystatechange="if (this.readyState == \'complete\') domReady.callback();"' +

		'><\/script>');



} else {



	if (window.addEventListener) {

		// for Mozilla browsers, Opera 9

		document.addEventListener("DOMContentLoaded", domReady.callback, false);

		// Fail safe

		window.addEventListener("load", domReady.callback, false);

	} else if (window.attachEvent) {

		window.attachEvent('onload', domReady.callback);

	} else {

		// Legacy browsers (e.g. Mac IE 5)

		var fn = window.onload;

		window.onload = function() {

			domReady.callback();

			if (fn) fn();

		}

	}



}

*/