if (document.images) {
	about_hu_on = new Image();
	about_hu_on.src = "gfx/menu/about_hu_on.jpg";
	about_hu_off = new Image();
	about_hu_off.src = "gfx/menu/about_hu_off.jpg";

	buildings_hu_on = new Image();
	buildings_hu_on.src = "gfx/menu/buildings_hu_on.jpg";
	buildings_hu_off = new Image();
	buildings_hu_off.src = "gfx/menu/buildings_hu_off.jpg";

	contact_hu_on = new Image();
	contact_hu_on.src = "gfx/menu/buildings_rent_hu_on.jpg";
	contact_hu_off = new Image();
	contact_hu_off.src = "gfx/menu/buildings_rent_hu_off.jpg";

	contact_hu_on = new Image();
	contact_hu_on.src = "gfx/menu/contact_hu_on.jpg";
	contact_hu_off = new Image();
	contact_hu_off.src = "gfx/menu/contact_hu_off.jpg";

	error_report_hu_on = new Image();
	error_report_hu_on.src = "gfx/menu/error_report_hu_on.jpg";
	error_report_hu_off = new Image();
	error_report_hu_off.src = "gfx/menu/error_report_hu_off.jpg";

	services_hu_on = new Image();
	services_hu_on.src = "gfx/menu/services_hu_on.jpg";
	services_hu_off = new Image();
	services_hu_off.src = "gfx/menu/services_hu_off.jpg";

}