if(document.images) {
   home_on = new Image(90,20);
   home_on.src = "http://www.energydepot.com/images/nav/home_on.gif";
   home_off = new Image(90,20);
   home_off.src = "http://www.energydepot.com/images/nav/home_off.gif";
   aboutus_on = new Image(90,20);
   aboutus_on.src = "http://www.energydepot.com/images/nav/aboutus_on.gif";
   aboutus_off = new Image(90,20);
   aboutus_off.src = "http://www.energydepot.com/images/nav/aboutus_off.gif";
   contactus_on = new Image(90,20);
   contactus_on.src = "http://www.energydepot.com/images/nav/contactus_on.gif";
   contactus_off = new Image(90,20);
   contactus_off.src = "http://www.energydepot.com/images/nav/contactus_off.gif";
   news_on = new Image(90,20);
   news_on.src = "http://www.energydepot.com/images/nav/news_on.gif";
   news_off = new Image(90,20);
   news_off.src = "http://www.energydepot.com/images/nav/news_off.gif";
   portfolio_on = new Image(90,20);
   portfolio_on.src = "http://www.energydepot.com/images/nav/portfolio_on.gif";
   portfolio_off = new Image(90,20);
   portfolio_off.src = "http://www.energydepot.com/images/nav/portfolio_off.gif";
   products_on = new Image(90,20);
   products_on.src = "http://www.energydepot.com/images/nav/products_on.gif";
   products_off = new Image(90,20);
   products_off.src = "http://www.energydepot.com/images/nav/products_off.gif";
   
   services_on = new Image(90,20);
   services_on.src = "http://www.energydepot.com/images/nav/services_on.gif";
   services_off = new Image(90,20);
   services_off.src = "http://www.energydepot.com/images/nav/services_off.gif";
   support_on = new Image(90,20);
   support_on.src = "http://www.energydepot.com/images/nav/support_on.gif";
   support_off = new Image(90,20);
   support_off.src = "http://www.energydepot.com/images/nav/support_off.gif";
   demos_on = new Image(90,20);
   demos_on.src = "http://www.energydepot.com/images/nav/demos_on.gif";
   demos_off = new Image(90,20);
   demos_off.src = "http://www.energydepot.com/images/nav/demos_off.gif";
   
}  

function nav_rollover(target) {
   if(document.images) {
      eval("document.images[target].src=" + target + "_on.src");
   }
}
function nav_rollout(target) {
   if(document.images) {
      eval("document.images[target].src=" + target + "_off.src");
   }
}