这段JS代码在FIREFOX下不正常，在IE下是正常的，哪位高手帮忙改改呢？

Question

var speed1=50//速度数值越大速度越慢
document.getElementById("dear2").innerHTML=document.getElementById("dear1").innerHTML
document.getElementById("dear").scrollLeft=document.getElementById("dear").scrollWidth
function Marquee(){ 
if(document.getElementById("dear").scrollLeft<=0) 
document.getElementById("dear").scrollLeft+=document.getElementById("dear2").offsetWidth 
else{ 
document.getElementById("dear").scrollLeft-- 
} 
}
var MyMar=setInterval(Marquee,speed1)
dear.onmouseover=function() {clearInterval(MyMar)}
dear.onmouseout=function() {MyMar=setInterval(Marquee,speed1)}

Answer 1

try to see:http://topic.csdn.net/u/20090902/22/4be98add-ec5e-4bfc-adbf-8eda22331fbf.html