function addEvent(elt, name, handler, atEnd)
{
	name = name.replace(/^(on)?/, 'on');
	var prev = elt[name];
	var tmp = '__tmp';

	elt[name] = function(e)
	{
		if (!e) e = window.event;
		var result;

		if (!atEnd)
		{
			elt[tmp] = handler;
			result = elt[tmp](e);
			elt[tmp] = null;
			if (result === false) return result;
		}

		if (prev)
		{
			elt[tmp] = prev;
			result = elt[tmp](e);
			elt[tmp] = null;
		}

		if (atEnd && result !== false)
		{
			elt[tmp] = handler;
			result = elt[tmp](e);
			elt[tmp] = null;
		}

		return result;
	}

	return handler;
}

function addEvent2(element, type, handler) {
	if (element.addEventListener){
		element.addEventListener(type, handler, false);
	} else {
		if (!handler.$$guid) handler.$$guid = addEvent.guid++;
		if (!element.events) element.events = {};
		var handlers = element.events[type];
		if (!handlers) {
			handlers = element.events[type] = {};
			if (element["on" + type]) {
				handlers[0] = element["on" + type];
			}
		}
		handlers[handler.$$guid] = handler;
		element["on" + type] = handleEvent;
	}
};
addEvent.guid = 1;

function removeEvent(element, type, handler) {
	if (element.removeEventListener) {
		element.removeEventListener(type, handler, false);
	} else {
		if (element.events && element.events[type]) {
			delete element.events[type][handler.$$guid];
		}
	}
};

function handleEvent(event) {
	var returnValue = true;
	event = event || fixEvent(((this.ownerDocument || this.document || this).parentWindow || window).event);
	var handlers = this.events[event.type];
	for (var i in handlers) {
		this.$$handleEvent = handlers[i];
		if (this.$$handleEvent(event) === false) {
			returnValue = false;
		}
	}
	return returnValue;
};

function fixEvent(event) {
	event.preventDefault = fixEvent.preventDefault;
	event.stopPropagation = fixEvent.stopPropagation;
	return event;
};

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