JS:attachEvent和addEventListener 使用方法

JYEvent.addListener=function(o, evType, f, capture) //增加事件
{
if(o.addEventListener)
{
if(typeof(capture)=="undefined")
capture = false;
o.addEventListener(evType, f, capture);
}
else if (o.attachEvent)
o.attachEvent("on" + evType, f);
else
eval("o.on" + evType + "=f;");
};

attachEvent 支持IE,不支持firefox

attachEventListener 支持firefox