if (document.images) {
  image1on = new Image();
  image1on.src = "images/ourmission_on.gif";

  image1off = new Image();
  image1off.src = "images/ourmission_off.gif";

  image2on = new Image();
  image2on.src = "images/whatweare_on.gif";

  image2off = new Image();
  image2off.src = "images/whatweare_off.gif";

  image3on = new Image();
  image3on.src = "images/signs_on.gif";

  image3off = new Image();
  image3off.src = "images/signs_off.gif";

  image4on = new Image();
  image4on.src = "images/ourresults_on.gif";

  image4off = new Image();
  image4off.src = "images/ourresults_off.gif";

  image5on = new Image();
  image5on.src = "images/ourebook_on.gif";

  image5off = new Image();
  image5off.src = "images/ourebook_off.gif";

  image6on = new Image();
  image6on.src = "images/shareatip_on.gif";

  image6off = new Image();
  image6off.src = "images/shareatip_off.gif";

  image7on = new Image();
  image7on.src = "images/askus_on.gif";

  image7off = new Image();
  image7off.src = "images/askus_off.gif";

  image8on = new Image();
  image8on.src = "images/waistingaway_home.gif";

  image8off = new Image();
  image8off.src = "images/waistingaway_logo.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');
  }
}