var speed3=50//速度数值越大速度越慢
demo8.innerHTML=demo7.innerHTML
function Marquee(){
if(demo8.offsetWidth-demo6.scrollLeft<=0)
demo6.scrollLeft-=demo7.offsetWidth
else{
demo6.scrollLeft++
}
}
var MyMar=setInterval(Marquee,speed3)
demo6.onmouseover=function() {clearInterval(MyMar)}
demo6.onmouseout=function() {MyMar=setInterval(Marquee,speed3)}