if (document.images) {
   homeOn = new Image();
   homeOn.src = "images/paw-home-on.gif";
   homeOff = new Image();
   homeOff.src = "images/paw-home-off.gif";
   }

if (document.images) {
   aboutOn = new Image();
   aboutOn.src = "images/paw-about-on.gif";
   aboutOff = new Image();
   aboutOff.src = "images/paw-about-off.gif";
   }

if (document.images) {
   pricesOn = new Image();
   pricesOn.src = "images/paw-prices-on.gif";
   pricesOff = new Image();
   pricesOff.src = "images/paw-prices-off.gif";
   }

if (document.images) {
   contactOn = new Image();
   contactOn.src = "images/paw-contact-on.gif";
   contactOff = new Image();
   contactOff.src = "images/paw-contact-off.gif";
   }

if (document.images) {
   galleryOn = new Image();
   galleryOn.src = "images/paw-gallery-on.gif";
   galleryOff = new Image();
   galleryOff.src = "images/paw-gallery-off.gif";
   }

if (document.images) {
   linksOn = new Image();
   linksOn.src = "images/paw-links-on.gif";
   linksOff = new Image();
   linksOff.src = "images/paw-links-off.gif";
   }

function activate(image_name) {
   if (document.images) {
       document[image_name].src = eval(image_name + "On.src");
   }
   }

function deactivate(image_name) {
   if (document.images) {
       document[image_name].src = eval(image_name + "Off.src");
   }
}