求网页中滚动文本的特效代码

求网页中滚动文本的特效代码

<table width="123" height="160" border="0" cellpadding="0" cellspacing="0">

<tr >
<td align="center" valign="top" bgcolor="ffd77b" >
<div id=demo style="overflow:hidden; width:160px; height:220px;">
<div id=demo1>
<table width="90%" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td align="left" class="sha">
aaaaaaaaaaaaaaaaaaaaaaaaaa</td>
</tr>
</table>
</div>
<div id=demo2></div>
</div>
<script language="javascript">
var speed=30
demo2.innerHTML=demo1.innerHTML
function Marquee(){
if(demo2.offsetTop-demo.scrollTop<=0)
demo.scrollTop-=demo1.offsetHeight
else{
demo.scrollTop++
}
}
var MyMar=setInterval(Marquee,speed)
demo.onmouseover=function() {clearInterval(MyMar)}
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}
</script>
</td>
</tr>
<tr><td valign=top height="0"></td></tr>
</table>2008-11-18