if (document.images) {
  cat1b = new Image();
  cat1b.src = "/archive/banner/2069b.jpg";
  cat1a = new Image();
  cat1a.src = "/archive/banner/2069.jpg";
  cat2b = new Image();
  cat2b.src = "/archive/banner/2245b.jpg";
  cat2a = new Image();
  cat2a.src = "/archive/banner/2245.jpg";
  cat3b = new Image();
  cat3b.src = "/archive/banner/4129b.jpg";
  cat3a = new Image();
  cat3a.src = "/archive/banner/4129.jpg";
  cat4b = new Image();
  cat4b.src = "/archive/banner/2026b.jpg";
  cat4a = new Image();
  cat4a.src = "/archive/banner/2026.jpg";
  cat5b = new Image();
  cat5b.src = "/archive/banner/4382b.jpg";
  cat5a = new Image();
  cat5a.src = "/archive/banner/4382.jpg";
  cat6b = new Image();
  cat6b.src = "/archive/banner/2038b.jpg";
  cat6a = new Image();
  cat6a.src = "/archive/banner/2038.jpg";
  cat7b = new Image();
  cat7b.src = "/archive/banner/3548b.jpg";
  cat7a = new Image();
  cat7a.src = "/archive/banner/3548.jpg";
  cat8b = new Image();
  cat8b.src = "/archive/banner/3128b.jpg";
  cat8a = new Image();
  cat8a.src = "/archive/banner/3128.jpg";
} 
 
function act(imgName) {
  if (document.images) 
  document[imgName].src = eval(imgName + "b.src");
} 
 
function inact(imgName) {
  if (document.images)
  document[imgName].src = eval(imgName + "a.src");
}