图片效果js代码在ie7能正常显示怎么在ie6布不能显示

<div id="table"><table width="310" height="215" border="0" cellpadding="0" cellspacing="0">
<tr>
<td width="350" height="215">
<script language="JavaScript">
var bannerAD=new Array();
var adNum=0;
bannerAD[0]="images/youya.jpg";
bannerAD[1]="images/15.jpg";
bannerAD[2]="images/13.jpg";
bannerAD[3]="images/16.jpg";
function setTransition(){
if (document.all){
bannerADrotator.filters.revealTrans.Transition=Math.floor(Math.random()*20);
bannerADrotator.filters.revealTrans.apply();
}
}
function playTransition(){
if (document.all)
bannerADrotator.filters.revealTrans.play() }
function nextAd(){
if(adNum<bannerAD.length-1)adNum++;
else adNum=0;
setTransition();
document.images.bannerADrotator.src=bannerAD[adNum];
playTransition();
theTimer=setTimeout("nextAd()", 5000);
}
</script>
<img height=350 src="" width=300 border=1 name=bannerADrotator>
<SCRIPT language=JavaScript>nextAd()</SCRIPT>

这个没办法只能两个浏览器看慢慢调，

可能ff上还不一样呢