if (document.images) {
  image01on = new Image();
  image01on.src = "/images/nav_01r.gif";

  image02on = new Image();
  image02on.src = "/images/nav_02r.gif";

  image03on = new Image();
  image03on.src = "/images/nav_03r.gif";  
  
  image04on = new Image();
  image04on.src = "/images/nav_04r.gif"; 
    
  image05on = new Image();
  image05on.src = "/images/nav_05r.gif"; 
    
  image06on = new Image();
  image06on.src = "/images/nav_06r.gif"; 
    
  image07on = new Image();
  image07on.src = "/images/nav_07r.gif"; 
  
  image08on = new Image();
  image08on.src = "/images/nav_08r.gif";  
  
  image50on = new Image();
  image50on.src = "/images/nav_homer.gif";  

  image01off = new Image();
  image01off.src = "/images/nav_01.gif";

  image02off = new Image();
  image02off.src = "/images/nav_02.gif";

  image03off = new Image();
  image03off.src = "/images/nav_03.gif";
  
  image04off = new Image();
  image04off.src = "/images/nav_04.gif";
  
  image05off = new Image();
  image05off.src = "/images/nav_05.gif";
    
  image06off = new Image();
  image06off.src = "/images/nav_06.gif";
    
  image07off = new Image();
  image07off.src = "/images/nav_07.gif";
    
  image08off = new Image();
  image08off.src = "/images/nav_08.gif";

  image50off = new Image();
  image50off.src = "/images/nav_home.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");
    }
  }
}