<!--
var demo = document.getElementById("demo");
var demo1 = document.getElementById("demo1");
var demo2 = document.getElementById("demo2");
var speed=10;    //数值越大滚动速度越慢
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)}
-->