JavaScript 兼容旧版浏览器的 addEvent 与 removeEvent 实现

兼容旧版浏览器的 addEvent 与 removeEvent 实现

网上搜来的，看样子不错，记一笔。

// heavily based on the Quirksmode addEvent contest winner, John Resig

// addEvent

function addEvent(obj,type,fn){

if(obj.addEventListener) obj.addEventListener(type,fn,false);

else if(obj.attachEvent){

obj["e"+type+fn]=fn;

obj[type+fn]=function(){obj["e"+type+fn](window.event);}

obj.attachEvent("on"+type,obj[type+fn]);

}

}

// removeEvent

function removeEvent(obj,type,fn){

if(obj.removeEventListener) obj.removeEventListener(type,fn,false);

else if(obj.detachEvent){

obj.detachEvent("on"+type,obj[type+fn]);