var EventUtil = {    addHandler:function(elm,type,handler){
   //添加事件        if(elm.addEventListener){            elm.addEventListener(type,handler,false);        }else if(elm.attachEvent){            elm.attachEvent('on'+type,handler);        }else{            elm['on'+'type']= handler;        }    },    removeHandler:function(elm,type,handler){
   //移除事件        if(elm.removeEventListener){            elm.removeEventListener(type,handler,false);        }else if(elm.detachEvent){            elm.detachEvent('on'+type,handler);        }else{            elm['on'+type]=null;        }    },    getEvent:function(event){
   //获取e        return event?event:window.event;    },    getTarget:function(event){
   //获取当前点击对象        return event.target || event.srcElement;    },    preventDefault:function(event){
   //阻止默认事件        if(event.preventDefault){            event.preventDefault();        }else{            event.returnValue = false;        }    },    stopPropagation:function(event){
   //阻止冒泡事件        if(event.stopPropagation){            event.stopPropagation();        }else{            event.cancleBubble= true;        }    }}