滚动效果
程序代码：<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<script type="text/javascript" language="javascript">
var i=1;
function show()
{
if(Div3.offsetTop-Div1.scrollTop<=0)
{
Div1.scrollTop-=Div2.offsetHeight;
}
else
{
Div1.scrollTop++;
}
}
var theTime=setInterval("show()",50);
</script>
</head>
<body>
<div id="Div1" style="overflow:hidden;width:383px;height:275px">
<div id="Div2" style="overflow:hidden;width:346px;height:117px">
<p>asdfasdfffffffffffffffffffffffffffff</p>
<p>fffffffffffffffffffffffffffffffffffffffff</p>
<p>fffffffffffffffffffffffffffffffffffffffffffffff</p>
<p>fffffffffffffffffffffffffffffffffffffffffffff</p>
</div>
<div id="Div3" style="position:absolute;left:15px;top:153px;width:353px;height:105px">
<p>fffffffffffffffffffffffffffffffff</p>
<p>sssssssssssssssssssssssssssssssssssss</p>
<p>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</p>
<p>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</p>
</div>
</div>
</body>
</html>
不知道为什么只滚动一下就不走了！请大侠帮忙看看！
