function preload_images() {
	menu_gastro_aktuell_on = new Image();
	menu_gastro_aktuell_on.src = "images/gastro_aktuell_on.gif";
	menu_gastro_aktuell_off = new Image();
	menu_gastro_aktuell_off.src = "images/gastro_aktuell_off.gif";

	menu_gastro_boerse_on = new Image();
	menu_gastro_boerse_on.src = "images/gastro_boerse_on.gif";
	menu_gastro_boerse_off = new Image();
	menu_gastro_boerse_off.src = "images/gastro_boerse_off.gif";

	menu_gastro_automaten_on = new Image();
	menu_gastro_automaten_on.src = "images/gastro_automaten_on.gif";
	menu_gastro_automaten_off = new Image();
	menu_gastro_automaten_off.src = "images/gastro_automaten_off.gif";

	menu_gastro_about_on = new Image();
	menu_gastro_about_on.src = "images/gastro_about_on.gif";
	menu_gastro_about_off = new Image();
	menu_gastro_about_off.src = "images/gastro_about_off.gif";

	submenu_home_on = new Image();
	submenu_home_on.src = "images/home_on.gif";
	submenu_home_off = new Image();
	submenu_home_off.src = "images/home_off.gif";

	submenu_kontakt_on = new Image();
	submenu_kontakt_on.src = "images/kontakt_on.gif";
	submenu_kontakt_off = new Image();
	submenu_kontakt_off.src = "images/kontakt_off.gif";

	submenu_sitemap_on = new Image();
	submenu_sitemap_on.src = "images/sitemap_on.gif";
	submenu_sitemap_off = new Image();
	submenu_sitemap_off.src = "images/sitemap_off.gif";

	bottommenu_gastronomie_on = new Image();
	bottommenu_gastronomie_on.src = "images/gastronomie_on.gif";
	bottommenu_gastronomie_off = new Image();
	bottommenu_gastronomie_off.src = "images/gastronomie_off.gif";
}

function img_act(imgName)
{
	imgOn = eval(imgName + "_on.src");
	document[imgName].src = imgOn;
}

function img_inact(imgName)
{
	imgOff = eval(imgName + "_off.src");
	document[imgName].src = imgOff;
}

preload_images();