原生态javascript不间断向左滚动代码

<div id=demo style="overflow:hidden;width:750;" align=center>

<table border=0 align=center cellpadding=1 cellspacing=1 cellspace=0 >

<tr>

<td valign=top bgcolor=ffffff id=marquePic1>

<table width='100%' border='0' cellspacing='0'>

<tr>

<td align=center><a href='#'><img src="
http://www.baidu.com/img/shouye_b5486898c692066bd2cbaeda86d74448.gif" width=120 height=80 border=0><br><br>01</a></td>

<td align=center><a href='#'><img src="
http://www.baidu.com/img/shouye_b5486898c692066bd2cbaeda86d74448.gif" width=120 height=80 border=0><br><br>02</a></td>

<td align=center><a href='#'><img src="
http://www.baidu.com/img/shouye_b5486898c692066bd2cbaeda86d74448.gif" width=120 height=80 border=0><br><br>03</a></td>

<td align=center><a href='#'><img src="
http://www.baidu.com/img/shouye_b5486898c692066bd2cbaeda86d74448.gif" width=120 height=80 border=0><br><br>04</a></td>

<td align=center><a href='#'><img src="
http://www.baidu.com/img/shouye_b5486898c692066bd2cbaeda86d74448.gif" width=120 height=80 border=0><br><br>05</a></td>

<td align=center><a href='#'><img src="
http://www.baidu.com/img/shouye_b5486898c692066bd2cbaeda86d74448.gif" width=120 height=80 border=0><br><br>06</a></td>

<td align=center><a href='#'><img src="
http://www.baidu.com/img/shouye_b5486898c692066bd2cbaeda86d74448.gif" width=120 height=80 border=0><br><br>07</a></td>

<td align=center><a href='#'><img src="
http://www.baidu.com/img/shouye_b5486898c692066bd2cbaeda86d74448.gif" width=120 height=80 border=0><br><br>08</a></td>

<td align=center><a href='#'><img src="
http://www.baidu.com/img/shouye_b5486898c692066bd2cbaeda86d74448.gif" width=120 height=80 border=0><br><br>09</a></td>

</tr>

</table>

</td>

<td id=marquePic2 valign=top></td>

</tr>

</table>

</div>

<script type="text/javascript">

var speed=50

marquePic2.innerHTML=marquePic1.innerHTML

function Marquee(){

if(demo.scrollLeft>=marquePic1.scrollWidth){

demo.scrollLeft=0

}else{

demo.scrollLeft++

}

}

var MyMar=setInterval(Marquee,speed)

demo.onmouseover=function() {clearInterval(MyMar)}

demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}

</script>