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

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

  image3on = new Image();
  image3on.src = "/images/testimonials_over.gif";
        
  image4on = new Image();
  image4on.src = "/images/store_over.gif";
  
  image5on = new Image();
  image5on.src = "/images/support_over.gif";
  
  image6on = new Image();
  image6on.src = "/images/downloads_over.gif";
  
  image7on = new Image();
  image7on.src = "/images/contact_over.gif";
  

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

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

  image3off = new Image();
  image3off.src = "/images/testimonials_normal.gif";
  
  image4off = new Image();
  image4off.src = "/images/store_normal.gif";
  
  image5off = new Image();
  image5off.src = "/images/support_normal.gif";
  
  image6off = new Image();
  image6off.src = "/images/downloads_normal.gif";
  
  image7off = new Image();
  image7off.src = "/images/contact_normal.gif";

}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}