请问网页中的滚动图片新闻效果怎么实现？ 就像csdn主页左侧的效果


<script language="JavaScript1.2"> 
<!-- 
/*设置下面的参数。 设置scrollerwidth和scrollerheight参数，设置成滚动显示的图片中尺寸最大的。*/
var scrollerwidth=400
var scrollerheight=66
var scrollerbgcolor='white'
//修改下面的每个图间暂停时间，本例为3秒。
var pausebetweenimages=3000
//改变下面的图像地址，如果希望logo都是带连接的，只要将#改为相应的链接地址。
var slideimages=new Array()
slideimages[0]='<a href=#><img src="../image/05s.jpg" border=0"></a>'
slideimages[1]='<a href=#><img src="../image/04s.jpg" border=0"></a>'
slideimages[2]='<a href=#><img src="../image/03s.jpg" border=0"></a>'
slideimages[3]='<a href=#><img src="../image/02s.jpg" border=0"></a>'//////下面的行不要编辑///////////////////////
if (slideimages.length>1)
i=2
else
i=0
function move1(whichlayer){
tlayer=eval(whichlayer)
if (tlayer.top>0&&tlayer.top<=5){
tlayer.top=0
setTimeout("move1(tlayer)",pausebetweenimages)
setTimeout("move2(document.main.document.second)",pausebetweenimages)
return
}
if (tlayer.top>=tlayer.document.height*-1){
tlayer.top-=5
setTimeout("move1(tlayer)",100)
}
else{
tlayer.top=scrollerheight
tlayer.document.write(slideimages[i])
tlayer.document.close()
if (i==slideimages.length-1)
i=0
else
i++
}}
function move2(whichlayer){
tlayer2=eval(whichlayer)
if (tlayer2.top>0&&tlayer2.top<=5){
tlayer2.top=0
setTimeout("move2(tlayer2)",pausebetweenimages)
setTimeout("move1(document.main.document.first)",pausebetweenimages)
return
}
if (tlayer2.top>=tlayer2.document.height*-1){
tlayer2.top-=5
setTimeout("move2(tlayer2)",100)
}
else{
tlayer2.top=scrollerheight
tlayer2.document.write(slideimages[i])
tlayer2.document.close()
if (i==slideimages.length-1)
i=0
else
i++
}}
function move3(whichdiv){
tdiv=eval(whichdiv)
if (tdiv.style.pixelTop>0&&tdiv.style.pixelTop<=5){
tdiv.style.pixelTop=0
setTimeout("move3(tdiv)",pausebetweenimages)
setTimeout("move4(second2)",pausebetweenimages)
return
}
if (tdiv.style.pixelTop>=tdiv.offsetHeight*-1){
tdiv.style.pixelTop-=5
setTimeout("move3(tdiv)",100)
}
else{
tdiv.style.pixelTop=scrollerheight
tdiv.innerHTML=slideimages[i]
if (i==slideimages.length-1)
i=0
else
i++
}
}
function move4(whichdiv){
tdiv2=eval(whichdiv)
if (tdiv2.style.pixelTop>0&&tdiv2.style.pixelTop<=5){
tdiv2.style.pixelTop=0
setTimeout("move4(tdiv2)",pausebetweenimages)
setTimeout("move3(first2)",pausebetweenimages)
return
}
if (tdiv2.style.pixelTop>=tdiv2.offsetHeight*-1){
tdiv2.style.pixelTop-=5
setTimeout("move4(second2)",100)
}
else{
tdiv2.style.pixelTop=scrollerheight
tdiv2.innerHTML=slideimages[i]
if (i==slideimages.length-1)
i=0
else
i++
}}
function startscroll(){
if (document.all){
move3(first2)
second2.style.top=scrollerheight
}
else if (document.layers){
move1(document.main.document.first)
document.main.document.second.top=scrollerheight+5
document.main.document.second.visibility='show'
}}
window.onload=startscroll
//-->
</script>
<ilayer id="main" width="&{scrollerwidth};" height="&{scrollerheight};" bgcolor="&{scrollerbgcolor};">
<layer id="first" left="0" top="1" width="&{scrollerwidth};">
<script language="JavaScript1.2">
if (document.layers)
document.write(slideimages[0])
</script>
</layer>
<layer id="second" left="0" top="0" width="&{scrollerwidth};" visibility="hide">
<script
language="JavaScript1.2">
if (document.layers)
document.write(slideimages[1])
</script>
</layer>
</ilayer>
<p><script language="JavaScript1.2">
<!-- 
if (document.all){
document.writeln('<span id="main2" style="position:relative;width:'+scrollerwidth+';height:'+scrollerheight+';overflow:hiden;background-color:'+scrollerbgcolor+'">')
document.writeln('<div style="position:absolute;width:'+scrollerwidth+';height:'+scrollerheight+';clip:rect(0 '+scrollerwidth+' '+scrollerheight+' 0);left:0;top:0">')
document.writeln('<div id="first2" style="position:absolute;width:'+scrollerwidth+';left:0;top:1;">')
document.write(slideimages[0])
document.writeln('</div>')
document.writeln('<div id="second2" style="position:absolute;width:'+scrollerwidth+';left:0;top:0">')
document.write(slideimages[1])
document.writeln('</div>')
document.writeln('</div>')
document.writeln('</span>')
}
//--></script> </p>