//要加载的图片-----------------------------------------------
var bannerAD=new Array();
bannerAD[0]="/images/tp-1.jpg"; 
bannerAD[1]="/images/tp-2.jpg"; 
bannerAD[2]="/images/tp-3.jpg";
bannerAD[3]="/images/tp-4.jpg";
bannerAD[4]="/images/tp-5.jpg"; 
var adNum=0;
//加载图片到内存---------------------------------------------
var preloadedimages=new Array();
function FillImages()
{
   for (i=0;i<bannerAD.length;i++){
      preloadedimages[i]=new Image();
      preloadedimages[i].src=bannerAD[i];
   }
}
function setTransition(){
   if (document.all){
      bannerADrotator.filters.revealTrans.Transition=Math.floor(Math.random()*23);
      bannerADrotator.filters.revealTrans.apply();
   }
}
function playTransition(){
   if (document.all)
      bannerADrotator.filters.revealTrans.play();
}
function nextAd(){
   if(adNum<bannerAD.length-1)
   {
 adNum++ ;
   }
   else
   {
 adNum=0;
   }
   if(typeof(bannerADrotator)=="undefined")
   {
        bannerADrotator=document.getElementById("bannerADrotator");
   }          
   setTransition();
   bannerADrotator.src=preloadedimages[adNum].src; 
   document.getElementById("bannerADrotator").style.display="";
   playTransition();
   theTimer=setTimeout("nextAd()", 3000);
}
function InitAd()
{
   FillImages();
   nextAd();
}
window.onload=InitAd;