var MyLeftMyMar;
                                      
var Myspeed=30;

function  MarqueeLeft()
{
clearInterval(MyLeftMyMar)


Mydemo2.innerHTML=Mydemo1.innerHTML
//向左走
function Marquee(){
if(Mydemo2.offsetWidth-Mydemo.scrollLeft<=0)
Mydemo.scrollLeft-=Mydemo1.offsetWidth
else{
Mydemo.scrollLeft++
}
}
MyLeftMyMar=setInterval(Marquee,Myspeed)
Mydemo.onmouseover=function() {clearInterval(MyLeftMyMar)}
Mydemo.onmouseout=function() {MyLeftMyMar=setInterval(Marquee,Myspeed)}
}
MarqueeLeft();