div图片marquee无缝连接实现代码

<div id="demo">
<div id="indemo">
<div id="demo1">
<div class="box">
<a href="#"><img src="http://www.cnrui.cn/other/link/Clear_logo.gif" border="0" /></a>
<p>你号</p>
hello
</div>
<div class="box">
<a href="#"><img src="http://www.cnrui.cn/other/link/Clear_logo.gif" border="0" /></a>
<p>白痴</p>
stupid
</div>
<div class="box">
<a href="#"><img src="http://www.cnrui.cn/other/link/Clear_logo.gif" border="0" /></a>
</div>
</div>
<div id="demo2"></div>
</div>
</div>
<script>
<!--
var speed=10; //数字越大速度越慢
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>
</body>
</html>