javascript 滚动图片代码

//滚动图片区
<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>
            <!--滚动图片-->
            </tr>
       </table>
       </td>
       <td id=demo2></td>
    </tr>
</table>
</div>

//javascript代码区
<script>
var speed=20    //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>