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  image2on = new Image();
  image2on.src = "images/about-on.gif";
  image2off = new Image();
  image2off.src = "images/about-off.gif";
  image3on = new Image();
  image3on.src = "images/contact-on.gif";
  image3off = new Image();
  image3off.src = "images/contact-off.gif";
  image4on = new Image();
  image4on.src = "images/careers-on.gif";
  image4off = new Image();
  image4off.src = "images/careers-off.gif";
  image5on = new Image();
  image5on.src = "images/fueloil-on.gif";
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function changeImages()
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// -->