js 图片走马灯

<style type="text/css">
#demo {
background: #FFF;
overflow:hidden;
border: 1px dashed #CCC;
width: 90%;
}
#demo img {
border: 3px solid #F2F2F2;
}
#indemo {
float: left;
width: 800%;
}
#demo1 {
float: left;
}
#demo2 {
float: left;
}
</style>

<center>

<div id="demo">
<div id="indemo">
<div id="demo1">
<a><img src="1.jpg" tppabs="photo02.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>

</div>
<div id="demo2">
<a><img src="1.jpg" tppabs="photo02.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>
<a><img src="2.jpg" tppabs="photo03.jpg" border="0"></a>

</div>
</div>
</div>
<script>
<!--
var speed=10;
var tab=document.getElementById("demo");
var tab1=document.getElementById("demo1");
var tab2=document.getElementById("demo2");
tab2.innerHTML=tab1.innerHTML;
function Marquee(){
if(tab2.offsetWidth-tab.scrollLeft<=0)
tab.scrollLeft-=tab1.offsetWidth
else{
tab.scrollLeft++;
}
}
var MyMar=setInterval(Marquee,speed);
tab.onmouseover=function() {clearInterval(MyMar)};
tab.onmouseout=function() {MyMar=setInterval(Marquee,speed)};
-->
</script>

</center>