跨浏览器事件处理程序

		//跨浏览器事件处理程序
		var eventUtil = {
			//添加句柄
			addHandler:function(element,type,handle){
				if(element.addEventListener){
					element.addEventListener(type,handle,false);
				}else if(element.attachEvent){
					element.attachEvent('on'+type,handle);
				}else{
					element['on' + type] = handle;
				}
			},
			removeHandler:function(element,type,handle){
				if(element.removeEventListener){
					element.removeEventListener(type,handle,false);
				}else if(element.detachEvent){
					element.detachEvent('on'+type,handle);
				}else{
					element['on' + type] = null;
				}
			}			
			
		}