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var EventUtil = {
	addHandler: function(element, type, handler){
		if(element.addEventListener) {
			element.addEventListener(type, handler, false);
		} else if(element.attachEvent) {
			element.attachEvent('on' + type, handler);
		} else {
			element['on' + type] = handler;
		}
	},
	removeHanlder: function(){
		if(element.removeEventListener) {
			element.removeEventListener(type, handler, false);
		} else if(element.detachEvent) {
			element.detachEvent('on' + type, handler);
		} else {
			element['on' + type] = null;
		}
	},
	getEvent: function(event){
		return event ? event : window.event;
	},
	getTarget: function(event){
		return event.target || event.srcElement;
	},
	getRelatedTarget: function(){
		if(event.relatedTarget) {
			return event.relatedTarget;
		} else if(event.toElement) {
			return event.toElement;
		} else if(event.fromElement) {
			return event.fromElement;
		} else {
			return null;
		}
	},
	getButton: function(event){
		if(document.implementation.hasFeature('MouseEvents', '2.0')) {
			return event.button;
		} else {
			switch(event.button) {
				case 0:
				case 1:
				case 3:
				case 5:
				case 7:
					return 0;
				case 2:
				case 6:
					return 2;
				case 4:
					return 1;
			}
		}
	},
	getWheelDelta: function(event){
		if(event.wheelDelta) {
			var engine = {};
			if(window.opera) {
				engine.ver = window.opera.version();
				engine.opera = parseFloat(engine.ver);
			} 
			return (engine.opera && engine.opera < 9.5 ? -event.wheelDelta : event.wheelDelta);
		} else {
			return -event.detail * 40;
		}
	},
	getCharCode: function(event){
		if(typeof event.charCode == 'number') {
			return event.charCode;
		} else {
			return event.keyCode;
		}
	},
	getClipboardText: function(event){
		var clipboardData = event.clipboardData || window.clipboardData;
		return clipboardData.getData('text');
	},
	setClipboardText: function(event, value){
		if(event.clipboardData) {
			return event.clipboardData.setData('text/plain', value);
		} else if(window.clipboardData) {
			return window.clipboardData.setData('text', value);
		}
	},
	preventDefault: function(event){
		if(event.preventDefault) {
			event.preventDefault();
		} else {
			event.returnValue = false;
		}
	},
	stopPropagation: function(event){
		if(event.stopPropagation) {
			event.stopPropagation();
		} else {
			event.cancelBubble = true;
		}
	},
};