var speed=13;//速度数值越大速度越慢
if (window.XMLHttpRequest){
	demo = document.getElementById("demo");
	demo1 = document.getElementById("demo1");
	demo2 = document.getElementById("demo2");
}
	
demo2.innerHTML=demo1.innerHTML;
function Marquee(){
	if(demo2.offsetWidth-demo.scrollLeft<=0) demo.scrollLeft-=demo1.offsetWidth;
	else demo.scrollLeft++;
}
var MyMar=setInterval(Marquee,speed);
demo.onmouseover=function() {clearInterval(MyMar)}
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}