var eventClass={
	
eventRegistry : {},

addEventListener : function(element, eventName, eventHandler, scope) {
	
var scopedEventHandler = scope ? function(e) { eventHandler.apply(scope, [e]); } : eventHandler;

if (typeof eventRegistry == "undefined") eventRegistry = {};

if (typeof eventRegistry[eventName] == "undefined") eventRegistry[eventName] = {};

eventRegistry[eventName][eventHandler] = scopedEventHandler;

element.addEventListener(eventName, scopedEventHandler, false);


},

removeEventListener : function(element, eventName, eventHandler, scope) {

var scopedEventHandler = eventRegistry[eventName][eventHandler];

element.removeEventListener(eventName, scopedEventHandler, false);

}

}