var speed3=25//速度数值越大速度越慢
gd2.innerHTML=gd1.innerHTML
function Marqueeb(){
if(gd2.offsetWidth-gd.scrollLeft<=0)
gd.scrollLeft-=gd1.offsetWidth
else{
gd.scrollLeft++
}
}
var MyMarb=setInterval(Marqueeb,speed3)
gd.onmouseover=function() {clearInterval(MyMarb)}
gd.onmouseout=function() {MyMarb=setInterval(Marqueeb,speed3)}