var speed3=25//速度数值越大速度越慢
demopro2.innerHTML=demopro1.innerHTML
function Marquee(){
if(demopro2.offsetWidth-demopro.scrollLeft<=0)
demopro.scrollLeft-=demopro1.offsetWidth
else{
demopro.scrollLeft++
}
}
var MyMar=setInterval(Marquee,speed3)
demopro.onmouseover=function() {clearInterval(MyMar)}
demopro.onmouseout=function() {MyMar=setInterval(Marquee,speed3)}