/*
 * (c)2006 Dean Edwards/Matthias Miller/John Resig
 * Special thanks to Dan Webb's domready.js Prototype extension
 * and Simon Willison's addLoadEvent
 *
 * For more info, see:
 * http://dean.edwards.name/weblog/2006/06/again/
 * http://www.vivabit.com/bollocks/2006/06/21/a-dom-ready-extension-for-prototype
 * http://simon.incutio.com/archive/2004/05/26/addLoadEvent
 * 
 * Thrown together by Jesse Skinner (http://www.thefutureoftheweb.com/)
 *
 *
 * To use: call addDOMLoadEvent one or more times with functions, ie:
 *
 *    function something() {
 *       // do something
 *    }
 *    addDOMLoadEvent(something);
 *
 *    addDOMLoadEvent(function() {
 *        // do other stuff
 *    });
 *
 */
 
function addDOMLoadEvent(func) {
   if (!window.__load_events) {
      var init = function () {
          // quit if this function has already been called
          if (arguments.callee.done) return;
      
          // flag this function so we don't do the same thing twice
          arguments.callee.done = true;
      
          // kill the timer
          if (window.__load_timer) {
              clearInterval(window.__load_timer);
              window.__load_timer = null;
          }
          
          // execute each function in the stack in the order they were added
          for (var i=0;i < window.__load_events.length;i++) {
              window.__load_events[i]();
          }
          window.__load_events = null;
      };
   
      // for Mozilla/Opera9
      if (document.addEventListener) {
          document.addEventListener("DOMContentLoaded", init, false);
      }
      
      // for Internet Explorer
			/*@cc_on @*/
			/*@if (@_win32)
			var proto = "javascript:void(0)";
			if (location.protocol == "https:") proto = "//0";
			document.write("<scr"+"ipt id=__ie_onload defer src=" + proto + "><\/scr"+"ipt>");
			var script = document.getElementById("__ie_onload");
			script.onreadystatechange = function() {
	 				if (this.readyState == "complete") {
	            init(); // call the onload handler
	        }
			};
			/*@end @*/


      // for Safari
      if (/WebKit/i.test(navigator.userAgent)) { // sniff
          window.__load_timer = setInterval(function() {
              if (/loaded|complete/.test(document.readyState)) {
                  init(); // call the onload handler
              }
          }, 10);
      }
      
      // for other browsers
      window.onload = init;
      
      // create event function stack
      window.__load_events = [];
   }
   
   // add function to event stack
   window.__load_events.push(func);
}

//add event function
function addEvent( obj, type, fn ) {
	if (obj.addEventListener) {
		obj.addEventListener( type, fn, false );
		EventCache.add(obj, type, fn);
	}
	else if (obj.attachEvent) {
		obj["e"+type+fn] = fn;
		obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }
		obj.attachEvent( "on"+type, obj[type+fn] );
		EventCache.add(obj, type, fn);
	}
	else {
		obj["on"+type] = obj["e"+type+fn];
	}
}

//remove event function
function removeEvent( obj, type, fn )
{
EventCache.remove(obj, type, fn);
}

//flush all events on page unload
var EventCache = function()
{
var listEvents = [];
return {
listEvents : listEvents,
add : function(node, sEventName, fHandler)
{
listEvents.push(arguments);
},
remove : function(node, sEventName, fHandler)
{
var i, item;
for(i = listEvents.length - 1; i >= 0; i = i - 1) {
if(node == listEvents[i][0] && sEventName == listEvents[i][1] && fHandler == listEvents[i][2]) {
item = listEvents[i];
if(item[0].removeEventListener) {
item[0].removeEventListener(item[1], item[2], item[3]);
}
if(item[1].substring(0, 2) != "on") {
item[1] = "on" + item[1];
}
if(item[0].detachEvent) {
item[0].detachEvent(item[1], item[0][sEventName+fHandler]);

}
item[0][item[1]] = null;
}
}
},
flush : function()
{
var i, item, eventtype;
for(i = listEvents.length - 1; i >= 0; i = i - 1) {
item = listEvents[i];
if(item[0].removeEventListener) {
item[0].removeEventListener(item[1], item[2], item[3]);
}
eventtype = item[1];
if(item[1].substring(0, 2) != "on") {
item[1] = 'on' + item[1];
}
if(item[0].detachEvent) {
item[0].detachEvent(item[1], item[2]);
item[0].detachEvent(item[1], item[0][eventtype+item[2]]);
}
item[0][item[1]] = null;
}
}
}
}();

function cleanUp(){
	EventCache.flush;
}