//跨浏览器兼容问题

			Util = {

					//添加类名

					add : function(ele,type,hand){

						if(ele.addEventListener){

								ele.addEventListener(type,hand,false);

						}else if(ele.attachEvent){

								ele.attachEvent("on" + type,hand);

						}else{

							ele["on" + type] = hand;

						}

					},

					//删除类名

					remove : function(ele,type,hand){

								if(ele.removeEventListener){

										ele.removeEventListener(type,hand,false);

								}else if(ele.detachEvent){

										ele.detachEvent("on" + type,hand);

								}else{

									ele["on" + type] = null;;

								}

					},

					//兼容事件对象

					getEvent : function(event){

						return event ? event : window.event;

					},

					//兼容获取当前标签

					getTarget : function(event){

						return event.target || event.srcElement;

					}

			},