var rollOverArr=new Array();

      function setrollover(OverImgSrc,pageImageName)
      {
        if (! document.images)return;

        if (pageImageName == null)
          pageImageName = document.images[document.images.length-1].name;

          rollOverArr[pageImageName]=new Object;
          rollOverArr[pageImageName].overImg = new Image;
          rollOverArr[pageImageName].overImg.src=OverImgSrc;
      }

      function rollover(pageImageName)
      {
        if (! document.images)return;
        if (! rollOverArr[pageImageName])return;
        if (! rollOverArr[pageImageName].outImg)
        {
        rollOverArr[pageImageName].outImg = new Image;
        rollOverArr[pageImageName].outImg.src = document.images[pageImageName].src;
        }
        document.images[pageImageName].src=rollOverArr[pageImageName].overImg.src;
      }

      function rollout(pageImageName)
      {
        if (! document.images)return;
        if (! rollOverArr[pageImageName])return;
        document.images[pageImageName].src=rollOverArr[pageImageName].outImg.src;
      }