一个很简洁 效果很好的js效果

<script language=JavaScript>
<!--
var pic_ar=new Array();
var pic_arlink=new Array();
var adNum=0;
pic_ar[0]="http://img1.pclady.com.cn/pclady/0611/07/121157_061107AI03%20(1).jpg";
pic_ar[1]="http://img1.pclady.com.cn/pclady/0611/07/121157_061107AI03.jpg";
pic_ar[2]="http://img1.pclady.com.cn/pclady/0611/07/121157_061107AI03%20(6).jpg";
pic_ar[3]="http://img1.pclady.com.cn/pclady/0611/07/121157_061107AI03%20(7).jpg";
pic_ar[4]="http://img1.pclady.com.cn/pclady/0611/07/121157_061107AI03%20(8).jpg";
pic_ar[5]="http://img1.pclady.com.cn/pclady/0611/07/121157_061107AI03%20(2).jpg";
pic_ar[6]="http://img1.pclady.com.cn/pclady/0611/07/121157_061107AI03%20(3).jpg";
pic_ar[7]="http://img1.pclady.com.cn/pclady/0611/07/121157_061107AI03%20(4).jpg";
pic_ar[8]="http://img1.pclady.com.cn/pclady/0611/07/121157_061107AI03%20(5).jpg";
var preloadedimages=new Array();
for (i=1;i<pic_ar.length;i++){
preloadedimages[i]=new Image();
preloadedimages[i].src=pic_ar[i];
}
function setTransition(){
if (document.all){
pic_arrotator.filters.revealTrans.Transition=Math.floor(Math.random()*23);
pic_arrotator.filters.revealTrans.apply();
}
}
function playTransition(){
if (document.all)
pic_arrotator.filters.revealTrans.play()
}
function nextAd(){
if(adNum<pic_ar.length-1)adNum++ ;
else adNum=0;
setTransition();
document.images.pic_arrotator.src=pic_ar[adNum];
playTransition();
theTimer=setTimeout("nextAd()", 5000);
}
function displayStatusMsg() {
status=pic_arlink[adNum];
document.returnValue = true;
}
//-->
</script>
<p style="text-align:center;text-indent:0"><IMG style="FILTER: revealTrans(duration=2,transition=20);border:1px solid #ccc" height=356 src="http://img1.pclady.com.cn/pclady/0611/07/121157_061107AI03%20(1).jpg" width="500" border="1" name="pic_arrotator"></p>
<script language=JavaScript>nextAd()</script>