if (document.images) {

  image1on = new Image();
  image1on.src = "images/homeover.gif";
 
  image2on = new Image();
  image2on.src = "images/aboutover.gif";

  
  image3on = new Image();
  image3on.src = "images/productover.gif";
  
  image4on = new Image();
  image4on.src = "images/suppover.gif";

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

  image6on = new Image();
  image6on.src = "images/loginover.gif";
 
  image7on = new Image();
  image7on.src = "images/contactover.gif";



  image1off = new Image();
  image1off.src = "images/home.gif";
 
  image2off = new Image();
  image2off.src = "images/about.gif";

  
  image3off = new Image();
  image3off.src = "images/products.gif";
  
  image4off = new Image();
  image4off.src = "images/supp.gif";

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

  image6off = new Image();
  image6off.src = "images/login.gif";
 
  image7off = new Image();
  image7off.src = "images/contact.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");
    }
  }
}