if (document.images) {

 passporton = new Image();
 passporton.src = "/images/menu_passport_on.gif";

 passportoff = new Image();
 passportoff.src = "/images/menu_passport_off.gif";

 mapon = new Image();
 mapon.src = "/images/menu_map_on.gif";

 mapoff = new Image();
 mapoff.src = "/images/menu_map_off.gif";

 winerieson = new Image();
 winerieson.src = "/images/menu_wineries_on.gif";

 wineriesoff = new Image();
 wineriesoff.src = "/images/menu_wineries_off.gif";

 newson = new Image();
 newson.src = "/images/menu_news_on.gif";

 newsoff = new Image();
 newsoff.src = "/images/menu_news_off.gif";
 
 eventson = new Image();
 eventson.src = "/images/menu_events_on.gif";

 eventsoff = new Image();
 eventsoff.src = "/images/menu_events_off.gif";

 homeon = new Image();
 homeon.src = "/images/menu_home_on.gif";

 homeoff = new Image();
 homeoff.src = "/images/menu_home_off.gif";

 }