var speed=120
pro_demo2.innerhtml=pro_demo1.innerhtml
function marquee(){
if(pro_demo2.offsetwidth-pro_demo.scrollleft<=0)
pro_demo.scrollleft-=pro_demo1.offsetwidth
else{
pro_demo.scrollleft+=5
}
}
var mymar=setinterval(marquee,speed)
pro_demo.onmouseover=function() {clearinterval(mymar)}
pro_demo.onmouseout=function() {mymar=setinterval(marquee,speed)}