如何制作一串从右到左移动的照片

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<style type="text/css">
.RollPic{
border:1px solid #999999;
padding:9px 9px 9px 9px;
background-color:#fff;
overflow:hidden;
}

.RollTitle{color:#fff;line-height:19px;}
</style>
<table width=750 cellspacing=0 bgcolor=#ffffff>
<tr>
<td width=1 height=2></td>
<td></td>
<td width=1></td>
</tr>
<tr>
<td></td>
<td>

<table width=100% cellspacing=0 style='border:1px solid #9F9F9F;'>
<tr align=center>
<td width=27 height=140 bgcolor=#7C7C7C class='RollTitle'><b>滚<br/>动<br/>图<br/>片</b></td>
<td bgcolor=#CCCCCC>
<div id=demo style="overflow:hidden;height:140px;width:700px;margin-top:12px;">

<table width= cellspacing=0>
<tr>
<td id=demo1>
<table cellspacing=0>
<tr>
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<td class=RollPic><a href=/z/chinaoverseas/photo/21206/index.shtml target="_blank"><img src=http://image2.sina.com.cn/ty/g/p/2005-10-28/U1022P6T12D1849520F44DT20051028232916_small_h.jpg border=1 alt='阿德莱德险胜曲圣卿发威'></a></td>
<td width=4><img width=4></td>
<td class=RollPic><a href=/z/chinaoverseas/photo/21153/index.shtml target="_blank"><img src=http://image2.sina.com.cn/ty/g/p/2005-10-27/U329P6T12D1847136F44DT20051027111027_small_h.jpg border=1 alt='德国杯邵佳一进球1860晋级'></a></td>
<td width=4><img width=4></td>
<td class=RollPic><a href=/z/chinaoverseas/photo/21143/index.shtml target="_blank"><img src=http://image2.sina.com.cn/ty/j/p/2005-10-27/U1489P6T12D1846210F44DT20051027015255_small_h.jpg border=1 alt='杜威回国欲汇合国足'></a></td>
<td width=4><img width=4></td>
<td class=RollPic><a href=/z/chinaoverseas/photo/21022/index.shtml target="_blank"><img src=http://image2.sina.com.cn/ty/g/p/2005-10-23/U1022P6T12D1839816F44DT20051023024326_small_h.jpg border=1 alt='孙继海难阻阿森纳取胜'></a></td>
<td width=4><img width=4></td>
<td class=RollPic><a href=/z/newphoto/photo/21000/index.shtml target="_blank"><img src=http://image2.sina.com.cn/ty/g/p/2005-10-22/U1533P6T12D1839147F44DT20051022202221_small_h.jpg border=1 alt='澳超曲圣卿表现不俗'></a></td>
<td width=4><img width=4></td>
<td class=RollPic><a href=/z/chinaoverseas/photo/20950/index.shtml target="_blank"><img src=http://image2.sina.com.cn/ty/g/p/2005-10-21/U1022P6T12D1837335F44DT20051021213650_small_h.jpg border=1 alt='杜威训练中热情高涨'></a></td>
<td width=4><img width=4></td>

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</tr>
</table>

</td>
<td id=demo2></td>
</tr>
</table>

</div>
</td>
</tr>
</table>
</td>
<td></td>
</tr>
<tr>
<td height=8></td>
<td></td>
<td></td>
</tr>
</table>

<script>
var speed=10//速度数值越大速度越慢
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)}
</script>
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