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]);
obj[type+fn]=null;
obj["e"+type+fn]=null;
}
}
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