javascript实现走马灯效果[无缝连接、循环滚动、无空白maquee]
以下代码在IE6、Firefox+Win2k环境下测试通过

一、向上的无缝循环滚动


程序代码： [ 复制代码到剪贴板 ]


<!-- 指向链接图片的URL -->
<base href="http://www.it365cn.com">
<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-->
        <img src="images/logo_1.gif">
        <img src="images/logo/flashempire.gif">
        <img src="images/logo.gif">
        <img src="images/logo/5dmedia.gif">
        <img src="images/logo/macromedia.gif">
        <img src="images/logo/sucaiw.gif">
        <img src="images/logo/blueieda.gif">
        <img src="images/logo/htmlcn.gif">
        <img src="images/logo/fwcn.gif">
    </div>
    <div id="demo2"></div>
</div>

<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>


二、向下的无缝循环滚动

程序代码： [ 复制代码到剪贴板 ]
<!-- 指向链接图片的URL -->
<base href="http://www.it365cn.com">
<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-->
        <img src="images/logo_1.gif">
        <img src="images/logo/flashempire.gif">
        <img src="images/logo.gif">
        <img src="images/logo/5dmedia.gif">
        <img src="images/logo/macromedia.gif">
        <img src="images/logo/sucaiw.gif">
        <img src="images/logo/blueieda.gif">
        <img src="images/logo/htmlcn.gif">
        <img src="images/logo/fwcn.gif">
    </div>
    <div id="demo2"></div>
</div>

<script language="javascript" type="text/javascript">
<!--
var demo = document.getElementById("demo");
var demo1 = document.getElementById("demo1");
var demo2 =