if (document.images) {
   image1on = new Image();
   image1on.src ="/images/products_on.gif";
   
   image2on = new Image();
   image2on.src ="/images/mens_on.gif";
   
   image3on = new Image();
   image3on.src ="/images/womens_on.gif";
   
   image4on = new Image();
   image4on.src ="/images/sunreaders_on.gif";
   
   image5on = new Image();
   image5on.src ="/images/accessories_on.gif";
   
   image6on = new Image();
   image6on.src ="/images/sunglasses_on.gif";
   
   image1off = new Image();
   image1off.src ="/images/products_off.gif";
   
   image2off = new Image();
   image2off.src ="/images/mens_off.gif"; 
   
   image3off = new Image();
   image3off.src ="/images/womens_off.gif";
   
   image4off = new Image();
   image4off.src ="/images/sunreaders_off.gif";
   
   image5off = new Image();
   image5off.src ="/images/accessories_off.gif";
   
   image6off = new Image();
   image6off.src ="/images/sunglasses_off.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");
      }
   }
}