var addEvent = function(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];
	}
}
	
var EventCache = function(){
	var listEvents = [];
	return {
		listEvents: listEvents,
		add: function(node, sEventName, fHandler){
			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]);
				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);