var speed35=25//速度数值越大速度越慢
demo25.innerHTML=demo15.innerHTML
function Marquee5(){
if(demo25.offsetTop-demo5.scrollTop<=0)
demo5.scrollTop-=demo15.offsetHeight 
else{
demo5.scrollTop++
}
}
var MyMar5=setInterval(Marquee5,speed35)
demo5.onmouseover=function() {clearInterval(MyMar5)}
demo5.onmouseout=function() {MyMar5=setInterval(Marquee5,speed35)}