if (document.images) {
  var bisc_off = new Image();
  bisc_off.src = "images/hdr_menu_bisc_off.gif";
  var bisc_on = new Image();
  bisc_on.src = "images/hdr_menu_bisc_on.gif";
  var cookie_off = new Image();
  cookie_off.src = "images/hdr_menu_cookie_off.gif";
  var cookie_on = new Image();
  cookie_on.src = "images/hdr_menu_cookie_on.gif";
  var past_off = new Image();
  past_off.src = "images/hdr_menu_past_off.gif";
  var past_on = new Image();
  past_on.src = "images/hdr_menu_past_on.gif";
  var choc_off = new Image();
  choc_off.src = "images/hdr_menu_choc_off.gif";
  var choc_on = new Image();
  choc_on.src = "images/hdr_menu_choc_on.gif";
  var gifts_off = new Image();
  gifts_off.src = "images/hdr_menu_gifts_off.gif";
  var gifts_on = new Image();
  gifts_on.src = "images/hdr_menu_gifts_on.gif";
  var spec_off = new Image();
  spec_off.src = "images/hdr_menu_spec_off.gif";
  var spec_on = new Image();
  spec_on.src = "images/hdr_menu_spec_on.gif";
  var recip_off = new Image();
  recip_off.src = "images/hdr_menu_recip_off.gif";
  var recip_on = new Image();
  recip_on.src = "images/hdr_menu_recip_on.gif";
}
function act(imgName) {
  if (document.images) 
    document.images[imgName].src = eval(imgName + "_on.src");
}
function inact(imgName) {
  if (document.images)
    document.images[imgName].src = eval(imgName + "_off.src");
}