新闻无缝滚动效果 [ 新手入门 ]

<tr>
<td>
<div id="ggb" style="OVERFLOW: hidden; WIDTH: 239; HEIGHT: 211px">
<div id=”ggb1”>
内容
</div>
<div id=”ggb1”>
&nbsp;
</div>
</div>
</td>
</tr>
<script>
var speed2=50
ggb2.innerHTML=ggb1.innerHTML
function Marquee2(){
if(ggb2.offsetTop-ggb.scrollTop<=0)
ggb.scrollTop-=ggb1.offsetHeight
else{
ggb.scrollTop++
}
}
var MyMar2=setInterval(Marquee2,speed2)
ggb.onmouseover=function() {clearInterval(MyMar2)}
ggb.onmouseout=function() {MyMar2=setInterval(Marquee2,speed2)}
</script>