adImages = new Array("Images/backache.jpg","Images/backache1.jpg","Images/MaleMuscleAnatomy.jpg", "Images/FemaleMuscleAnatomy.jpg", "Images/HeadAnatomy.jpg", "Images/brainspine.jpg", "Images/xrayheadwithbrain.jpg", "Images/skeletalanatomy.jpg", "Images/neckpain.jpg", "Images/skeleton.jpg", "Images/humanskeleton.jpg", "Images/SpinalChord.jpg", "Images/PieceofSpine.jpg", "Images/PieceofSpine1.jpg");
thisAd = 0;
imgCtr = adImages.length;

function rotate()
{
   if (document.images)
   {
      if (thisAd == imgCtr)
      {
         thisAd = 0;
      }
      document.adBanner.src=adImages[thisAd];
      thisAd++;

      setTimeout("rotate()", 5 * 1000);
   }
}