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function attEvent(obj,ev,fn)
{
if(obj.addEventListener)
{
obj.addEventListener(ev,fn,false);
}
else if(obj.attachEvent)
{
obj.attachEvent('on'+ev,fn); //导致这里报错
}
}
function throttle()
{
}
attEvent(window,'scroll',function(){});//IE6下正常
attEvent(window,'scroll',throttle());//IE6下,导致上面报错,类型不匹