var adImages = new Array("http://www.achelya.com.au/images/ban1.jpg","http://www.achelya.com.au/images/ban2.jpg","http://www.achelya.com.au/images/ban3.jpg","http://www.achelya.com.au/images/ban4.jpg")

var thisAd = 0

function cycle()
 {
   if(document.images) 
   {
     if (document.adBanner.complete) 
       {
         thisAd++
         if (thisAd == 4) 
           {
             thisAd = 0
           }
           document.adBanner.src=adImages[thisAd]
       }
       setTimeout("cycle()",4*1000)
   }
 }