无缝滚动（小鹏写）

<script>
var speed=40
var slide=document.getElementById("tablewrap");
var slide2=document.getElementById("demo2");
var slide1=document.getElementById("demo1");
slide2.innerHTML=slide1.innerHTML
function Marquee(){
if(slide2.offsetTop-slide.scrollTop<=0)
slide.scrollTop-=slide1.offsetHeight
else{
slide.scrollTop++
}
}
var MyMar=setInterval(Marquee,speed)
slide.onmouseover=function(){clearInterval(MyMar)}
slide.onmouseout=function(){MyMar=setInterval(Marquee,speed)}
</script>