var speed3=45//速度数值越大速度越慢
demo13.innerHTML=demo12.innerHTML
function Marquee(){
if(demo13.offsetWidth-demo11.scrollLeft<=0)
demo11.scrollLeft-=demo12.offsetWidth
else{
demo11.scrollLeft++
}
}
var MyMar=setInterval(Marquee,speed3)
demo11.onmouseover=function() {clearInterval(MyMar)}
demo11.onmouseout=function() {MyMar=setInterval(Marquee,speed3)}