var current = 0;

function init() {
   if (!document.images) return;
   
   if(current == myImages.length - 1) {
      current = 0;
   }
   else {
      current = current + 1;
   }
   


   if(useIEHack == true) {
      var oSpan = document.getElementById('topPictureImage');
      oSpan.filters(0).src = myImages[current];
   }
   else {
      document.images['topPictureImage'].src = myImages[current];
   }   
   
   setTimeout('init()',2000);
}