js-DOM事件

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;
        }
    }
}