上下不间断滚动支持表格

<div id="demo" style="overflow:hidden;height:168px;width:300px;">
<div id="demo1">
<!--此处放要显示的内容-->
</div>
<div id="demo2"></div>
</div>

<script language="javascript">
var speed=30;
var demo2=document.getElementById("demo2");
var demo1=document.getElementById("demo1");
var demo=document.getElementById("demo");
demo2.innerHTML=demo1.innerHTML;
function Marquee(){
if(demo2.offsetTop-demo.scrollTop<=0){
demo.scrollTop-=demo1.offsetHeight;
}
else{
demo.scrollTop++;
}
}
var MyMar=setInterval(Marquee,speed);
demo.onmouseover=function() {clearInterval(MyMar)};
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)};
</script>