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;
  }