if (document.images) {
  image1on = new Image();
  image1on.src = "images/homeOn.gif";
  image2on = new Image();
  image2on.src = "images/biographyOn.gif";
  image3on = new Image();
  image3on.src = "images/musicOn.gif";
  image4on = new Image();
  image4on.src = "images/onTourOn.gif";
  image5on = new Image();
  image5on.src = "images/inTuneOn.gif";
  image6on = new Image();
  image6on.src = "images/linksOn.gif";
  image7on = new Image();
  image7on.src = "images/contactOn.gif";




  image1off = new Image();
  image1off.src = "images/home.gif";
  image2off = new Image();
  image2off.src = "images/biography.gif";
  image3off = new Image();
  image3off.src = "images/music.gif";
  image4off = new Image();
  image4off.src = "images/onTour.gif";
  image5off = new Image();
  image5off.src = "images/inTune.gif";
  image6off = new Image();
  image6off.src = "images/links.gif";
  image7off = new Image();
  image7off.src = "images/contact.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");
  }
}