var speed3=25;//速度数值越大速度越慢

document.getElementById('jpdemo2').innerHTML=document.getElementById('jpdemo1').innerHTML;
function Marquee(){
if(document.getElementById('jpdemo2').offsetWidth-document.getElementById('jpdemo').scrollLeft<=0)
document.getElementById('jpdemo').scrollLeft-=document.getElementById('jpdemo1').offsetWidth;
else{
document.getElementById('jpdemo').scrollLeft++;
}
}
var MyMar=setInterval(Marquee,speed3);
document.getElementById('jpdemo').onmouseover=function() {clearInterval(MyMar)}
document.getElementById('jpdemo').onmouseout=function() {MyMar=setInterval(Marquee,speed3)}