<script language="javascript" type="text/javascript">
<!--
var demo = document.getElementById("demo");
var demo1 = document.getElementById("demo1");
var demo2 = document.getElementById("demo2");
var speed=10;    //滚动速度值，值越大速度越慢
demo2.innerHTML = demo1.innerHTML    //克隆demo2为demo1
function Marquee(){
    if(demo2.offsetTop-demo.scrollTop<=0)    //当滚动至demo1与demo2交界时
        demo.scrollTop-=demo1.offsetHeight    //demo跳到最顶端
    else{
        demo.scrollTop++
    }
}
var MyMar = setInterval(Marquee,speed);        //设置定时器
demo.onmouseover = function(){clearInterval(MyMar)}    //鼠标经过时清除定时器达到滚动停止的目的
demo.onmouseout = function(){MyMar = setInterval(Marquee,speed)}    //鼠标移开时重设定时器
-->
</script>

<div align="center" id="demo" style="overflow:hidden;height:200px;width:95px;border-width:1px 1px 1px 1px;border-style:dotted dotted dotted dotted;">
    <div id="demo1">
        <!-- 定义内容-->
        将阿拉法拉发放将阿拉法拉发放将阿拉法拉发放将阿拉法拉发放将阿拉法拉发放将阿拉法拉发放将阿拉法拉发放将阿拉法拉发放将阿拉法拉发放将阿拉法拉发放将阿拉法拉发放将阿拉法拉发放将阿拉法拉发放将阿拉法拉发放将阿拉法拉发放将阿拉法拉发放             </div>
    <div id="demo2"></div>
</div>