连继左右循环滚动图片效果

<div id=demo style=overflow:hidden;height:100%;width:570;color:#ffffff>
<table align=left cellpadding=0 cellspace=0 border=0>
<tr>
<td id=demo1 valign=top><img src="images/b.gif"><img src="images/test.gif"><img src="images/b.gif"><img src="images/test.gif"><img src="images/b.gif"><img src="images/test.gif"><img src="images/b.gif"><img src="images/test.gif"><img src="images/b.gif"><img src="images/test.gif">
</td>
<td id=demo2 valign=top></td>
</tr>
</table>
</div>

<script>
var speed=10
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)}
</script>