if (document.images) {

  image1on = new Image();
  image1on.src = "images/galleries_on.gif";
  image1off = new Image();
  image1off.src = "images/galleries_off.gif";

  image2on = new Image();
  image2on.src = "images/commissions_on.gif";
  image2off = new Image();
  image2off.src = "images/commissions_off.gif";

  image3on = new Image();
  image3on.src = "images/about_on.gif";
  image3off = new Image();
  image3off.src = "images/about_off.gif";

  image4on = new Image();
  image4on.src = "images/links_on.gif";
  image4off = new Image();
  image4off.src = "images/links_off.gif";

  image5on = new Image();
  image5on.src = "images/contact_on.gif";
  image5off = new Image();
  image5off.src = "images/contact_off.gif";

  image6on = new Image();
  image6on.src = "images/jsa_on.gif";
  image6off = new Image();
  image6off.src = "images/jsa_off.gif";

  image7on = new Image();
  image7on.src = "images/vamp_on.gif";
  image7off = new Image();
  image7off.src = "images/vamp_off.gif";

  image8on = new Image();
  image8on.src = "images/horseman_on.gif";
  image8off = new Image();
  image8off.src = "images/horseman_off.gif";

  image9on = new Image();
  image9on.src = "images/media_on.gif";
  image9off = new Image();
  image9off.src = "images/media_off.gif";

  image10on = new Image();
  image10on.src = "images/pencils_on.gif";
  image10off = new Image();
  image10off.src = "images/pencils_off.gif";

  image11on = new Image();
  image11on.src = "images/sketch_on.gif";
  image11off = new Image();
  image11off.src = "images/sketch_off.gif";

  image12on = new Image();
  image12on.src = "images/pastcomm_on.gif";
  image12off = new Image();
  image12off.src = "images/pastcomm_off.gif";

  image13on = new Image();
  image13on.src = "images/conpics_on.gif";
  image13off = new Image();
  image13off.src = "images/conpics_off.gif";

  image14on = new Image();
  image14on.src = "images/pricing_on.gif";
  image14off = new Image();
  image14off.src = "images/pricing_off.gif";


  image15on = new Image();
  image15on.src = "images/prev_on.gif";
  image15off = new Image();
  image15off.src = "images/prev_off.gif";

  image16on = new Image();
  image16on.src = "images/next_on.gif";
  image16off = new Image();
  image16off.src = "images/next_off.gif";

}

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');
  }
}