if (document.images) {
  image1on = new Image();
  image1on.src = "images/but_home_on.gif";
  image2on = new Image();
  image2on.src = "images/but_services_on.gif";
  image3on = new Image();
  image3on.src = "images/but_products_on.gif";
  image4on = new Image();
  image4on.src = "images/but_fun_on.gif";
  image5on = new Image();
  image5on.src = "images/but_email_on.gif";
  image6on = new Image();
  image6on.src = "images/but_about_on.gif";
  image7on = new Image();
  image7on.src = "/images/nav-triangle-ltgray.gif";
  image8on = new Image();
  image8on.src = "images/link-funstuff-on.gif";
  image9on = new Image();
  image9on.src = "/images/nav-graytriangle-ur.gif";


  image1off = new Image();
  image1off.src = "images/but_home_off.gif";
  image2off = new Image();
  image2off.src = "images/but_services_off.gif";
  image3off = new Image();
  image3off.src = "images/but_products_off.gif";
  image4off = new Image();
  image4off.src = "images/but_fun_off.gif";
  image5off = new Image();
  image5off.src = "images/but_email_off.gif";
  image6off = new Image();
  image6off.src = "images/but_about_off.gif";
  image7off = new Image();
  image7off.src = "/images/nav-bullet.gif";
  image8off = new Image();
  image8off.src = "images/link-funstuff-off.gif";
  image9off = new Image();
  image9off.src = "/images/nav-redbullet-ur.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");
  }
}