EventUtil 整理

/**
*
* 跨浏览器支持event
**/

var EventUtil = {
	//添加时间处理
	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;
		}
	},
	removeHandler:function(element, type, handler){
		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.enent;
	},
	getTarget:function(enent){
		return event.target || event.srcElement;
	},
	preventDefault:function(event){
		if(event.preventDefault){
			event.preventDefault();
		}else{
			event.returnValue = false;
		}
	},

	stopPropagation:function(event){
		if(event.stopPropagation){
			event.stopPropagation();
		}else{
			event.cancleBubble = true;
		}
	},

	getButton:function(event){
		if(document.implementaion.hasFeaturn('MouseEvent', '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 3;
				case 4:
					return 1
			}
		}
	},

	getWheelDelta:function(event){
		if(event.wheelDelta){
			return (client.engine.opera && client.engine.opera < 9.5 ? -event.wheelDelta : enent.wheelDelta);
		}else{
			return -event.detail = 40;
		}
	},

	getCharCode:function(event){
		if(typeof event.charCode == "number"){
			return event.charCode;
		}else{
			return event.keyCode;
		}
	}
}