function addEvent(elm, evType, fn, useCapture)
{
if (elm.addEventListener)
	{
	elm.addEventListener(evType, fn, useCapture);
	return true;
	}
else if (elm.attachEvent)
	{
	var r = elm.attachEvent('on' + evType, fn);
	EventCache.add(elm, evType, fn);
	return r;
	}
else
	{
	elm['on' + evType] = fn;
	}
}

function getEventSrc(e)
{
	if (!e) e = window.event;

	if (e.originalTarget)
		return e.originalTarget;
	else if (e.srcElement)
		return e.srcElement;
}

function addLoadEvent(func)
{
var oldonload = window.onload;
if (typeof window.onload != 'function')
	{
	window.onload = func;
	}
else
	{
	window.onload = 
		function() {
			oldonload();
			func();
		}
	}
}

var EventCache = function()
{
var listEvents = [];
return {
	listEvents : listEvents,

	add : function(node, sEventName, fHandler, bCapture)
		{
		listEvents.push(arguments);
		},

	flush : function()
		{
		var i, item;
		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]);
				};
				
				/* From this point on we need the event names to be prefixed with 'on" */
			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][item[1]] = null;
			};
		}
	};
}();

addEvent(window,'unload',EventCache.flush, false);