if (document.images) {
  image1on = new Image();
  image1on.src = "images/productheader/rackmount_server_on.jpg";
  image2on = new Image();
  image2on.src = "images/productheader/tower_on.jpg";
  image3on = new Image();
  image3on.src = "images/productheader/rackmount_storage_on.jpg";
  image4on = new Image();
  image4on.src = "images/productheader/rack_on.jpg";
  image5on = new Image();
  image5on.src = "images/productheader/displays_on.jpg";
  image6on = new Image();
  image6on.src = "images/productheader/slicknode_on.jpg";
  image7on = new Image();
  image7on.src = "images/configure_button3.gif";
  image8on = new Image();
  image8on.src = "images/configure_button3.gif";
  image9on = new Image();
  image9on.src = "images/configure_button3.gif";
  image10on = new Image();
  image10on.src = "images/configure_button3.gif";
  image11on = new Image();
  image11on.src = "images/configure_button3.gif";
  image12on = new Image();
  image12on.src = "images/configure_button3.gif";
  image13on = new Image();
  image13on.src = "images/configure_button3.gif";
  image14on = new Image();
  image14on.src = "images/configure_button3.gif";
  image15on = new Image();
  image15on.src = "images/productheader/opteron_on.jpg";


  image1off = new Image();
  image1off.src = "images/productheader/rackmount_server.jpg";
  image2off = new Image();
  image2off.src = "images/productheader/tower.jpg";
  image3off = new Image();
  image3off.src = "images/productheader/rackmount_storage.jpg";
  image4off = new Image();
  image4off.src = "images/productheader/rack.jpg";
  image5off = new Image();
  image5off.src = "images/productheader/displays.jpg";
  image6off = new Image();
  image6off.src = "images/productheader/slicknode.jpg";
  image7off = new Image();
  image7off.src = "images/configure_button3_on.gif";
  image8off = new Image();
  image8off.src = "images/configure_button3_on.gif";
  image9off = new Image();
  image9off.src = "images/configure_button3_on.gif";
  image10off = new Image();
  image10off.src = "images/configure_button3_on.gif";
  image11off = new Image();
  image11off.src = "images/configure_button3_on.gif";
  image12off = new Image();
  image12off.src = "images/configure_button3_on.gif";
  image13off = new Image();
  image13off.src = "images/configure_button3_on.gif";
  image14off = new Image();
  image14off.src = "images/configure_button3_on.gif";
  image15off = new Image();
  image15off.src = "images/productheader/opteron.jpg";

}

function turnOn(imageName) {
  if (document.images) {
    document[imageName].src = eval(imageName + "on.src");

  }
}

function turnOff(imageName) {
  if (document.images) {
    document[imageName].src = eval(imageName + "off.src");
  }
}