/*	Event Handlers	*/


function addEvent(elem, eventType, handler) { 
	if (!elem.eventHandlers) elem.eventHandlers = []; 
	if (!elem.eventHandlers[eventType]) { 
		elem.eventHandlers[eventType] = []; 
		if (elem['on' + eventType]) elem.eventHandlers[eventType].push(elem['on' + eventType]); 
		elem['on' + eventType] = handleEvent; 
	} 
	elem.eventHandlers[eventType].push(handler); 
} 
	
function removeEvent(elem, eventType, handler) { 
	var handlers = elem.eventHandlers[eventType]; 
	for (var i in handlers) if (handlers[i] == handler) delete handlers[i]; 
	
} 

function handleEvent(e) { 
	var returnValue = true; 
	if (!e) e = fixEvent(event); 
	var handlers = this.eventHandlers[e.type] 
	for (var i in handlers) { 
		this.$$handleEvent = handlers[i]; 
		returnValue = !((returnValue && this.$$handleEvent(e)) === false); 
	} return returnValue; 
} 

function fixEvent(event) { 
	// add W3C standard event methods 
	event.preventDefault = fixEvent.preventDefault; 
	event.stopPropagation = fixEvent.stopPropagation; 
	return event; 
}; 

fixEvent.preventDefault = function() { 
	this.returnValue = false; 
}; 
	
fixEvent.stopPropagation = function() { 
	this.cancelBubble = true; 
};