js 元素添加多个监听

function addListener(element,e,fn){
    if(element.addEventListener){
        element.addEventListener(e,fn,false);
    } else {
         element.attachEvent("on" + e,fn);
    }
}

var addEvent = function( obj, type, fn ) {
    if (obj.addEventListener)
        obj.addEventListener( type, fn, false );
    else if (obj.attachEvent) {    //兼容IE
        obj["e"+type+fn] = fn;
        obj.attachEvent( "on"+type, function() {
            obj["e"+type+fn].call(obj, window.event);
        } );
   }
};