function swapImage (elId, newState) {
	document.getElementById (elId).src = preloadedImages[elId+"_"+newState].src;
}

var preloadedImages = new Array ();

preloadedImages["menu_home_off"] = new Image (81, 50);
preloadedImages["menu_home_off"].src = "skin1/images/menu_home_off.gif";

preloadedImages["menu_home_on"] = new Image (81, 50);
preloadedImages["menu_home_on"].src = "skin1/images/menu_home_on.gif";

preloadedImages["menu_order_off"] = new Image (179, 50);
preloadedImages["menu_order_off"].src = "skin1/images/menu_start_off.gif";

preloadedImages["menu_order_on"] = new Image (179, 50);
preloadedImages["menu_order_on"].src = "skin1/images/menu_start_on.gif";

preloadedImages["menu_contact_off"] = new Image (242, 50);
preloadedImages["menu_contact_off"].src = "skin1/images/menu_help_off.gif";

preloadedImages["menu_contact_on"] = new Image (242, 50);
preloadedImages["menu_contact_on"].src = "skin1/images/menu_help_on.gif";

preloadedImages["menu_news_off"] = new Image (242, 50);
preloadedImages["menu_news_off"].src = "skin1/images/menu_ofice_off.gif";

preloadedImages["menu_news_on"] = new Image (242, 50);
preloadedImages["menu_news_on"].src = "skin1/images/menu_ofice_on.gif";

preloadedImages["menu_links_off"] = new Image (242, 50);
preloadedImages["menu_links_off"].src = "skin1/images/menu_thisweek_off.gif";

preloadedImages["menu_links_on"] = new Image (242, 50);
preloadedImages["menu_links_on"].src = "skin1/images/menu_thisweek_on.gif";

preloadedImages["menu_store_off"] = new Image (242, 50);
preloadedImages["menu_store_off"].src = "skin1/images/menu_homedelivery_off.gif";

preloadedImages["menu_store_on"] = new Image (242, 50);
preloadedImages["menu_store_on"].src = "skin1/images/menu_homedelivery_on.gif";