var speed=30 //速度数值越大速度越慢
var d1 = document.getElementById("marquePic1");
var d2 = document.getElementById("marquePic2");
 var d3 = document.getElementById("demo");
d2.innerHTML=d1.innerHTML 
function Marquee(){ 
if(d3.scrollLeft>=d1.scrollWidth){ 
d3.scrollLeft=0 
}else{ 
d3.scrollLeft++ 
}} 
var MyMar=setInterval(Marquee,speed) 
d3.onmouseover=function() {clearInterval(MyMar)} 
d3.onmouseout=function() {MyMar=setInterval(Marquee,speed)}