var speed=30 
caseshow.innerHTML+=caseshow.innerHTML 
function Marquee(){ 
if(caseshow.scrollTop>=860){ 
caseshow.scrollTop=0 
}else{ 
caseshow.scrollTop++ 
}} 
var MyMar=setInterval(Marquee,speed) 
caseshow.onmouseover=function() {clearInterval(MyMar)} 
caseshow.onmouseout=function() {MyMar=setInterval(Marquee,speed)}