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);