if (document.images) {

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

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

 aboutuson = new Image();
 aboutuson.src = "/images/menu_aboutus_on.gif";

 aboutusoff = new Image();
 aboutusoff.src = "/images/menu_aboutus_off.gif";

 galleryon = new Image();
 galleryon.src = "/images/menu_gallery_on.gif";

 galleryoff = new Image();
 galleryoff.src = "/images/menu_gallery_off.gif";

 supporton = new Image();
 supporton.src = "/images/menu_support_on.gif";

 supportoff = new Image();
 supportoff.src = "/images/menu_support_off.gif";

 climateon = new Image();
 climateon.src = "/images/menu_climate_on.gif";

 climateoff = new Image();
 climateoff.src = "/images/menu_climate_off.gif";

 contactuson = new Image();
 contactuson.src = "/images/menu_contactus_on.gif";

 contactusoff = new Image();
 contactusoff.src = "/images/menu_contactus_off.gif";

 wateron = new Image();
 wateron.src = "/images/menu_water_on.gif";

 wateroff = new Image();
 wateroff.src = "/images/menu_water_off.gif";

 mountainson = new Image();
 mountainson.src = "/images/menu_mountains_on.gif";

 mountainsoff = new Image();
 mountainsoff.src = "/images/menu_mountains_off.gif";

 desertson = new Image();
 desertson.src = "/images/menu_deserts_on.gif";

 desertsoff = new Image();
 desertsoff.src = "/images/menu_deserts_off.gif";

 snowon = new Image();
 snowon.src = "/images/menu_snow_on.gif";

 snowoff = new Image();
 snowoff.src = "/images/menu_snow_off.gif";

 roadson = new Image();
 roadson.src = "/images/menu_roads_on.gif";

 roadsoff = new Image();
 roadsoff.src = "/images/menu_roads_off.gif";

 structureson = new Image();
 structureson.src = "/images/menu_structures_on.gif";

 structuresoff = new Image();
 structuresoff.src = "/images/menu_structures_off.gif";

 }