if (document.images)
    {
     preload_image_object = new Image();
     image_url = new Array();
     image_url[0] = "/images/Link_Submit1.gif";
     image_url[1] = "/images/Link_Submit2.gif";

     var i = 0;
     for(i=0; i<=3; i++)
        preload_image_object.src = image_url[i];
      }

  function mouseOver()
  {
  document.button.src  = "/images/Link_Submit2.gif";
  }

  function mouseOut()
  {
  document.button.src  = "/images/Link_Submit1.gif";
  }