var speed3=25//速度数值越大速度越慢
demo4.innerHTML=demo3.innerHTML
function Marquee(){
if(demo4.offsetWidth-demo5.scrollLeft<=0)
demo5.scrollLeft-=demo3.offsetWidth
else{
demo5.scrollLeft++
}
}
var MyMar=setInterval(Marquee,speed3)
demo5.onmouseover=function() {clearInterval(MyMar)}
demo5.onmouseout=function() {MyMar=setInterval(Marquee,speed3)}