function reset(){
			if (parent.menu.menu_akt.src != "") {
				parent.menu.menu_akt.src="../images/shim.gif";
				parent.menu.mini.src="../images/shim.gif";
				parent.menu.menu_akt=parent.menu.menu_nil; 
			}
		}
		
		function zu(bereich) {
			parent.menu.location.href = "../" + bereich + "/menu_nop.html";
			parent.main.location.href = "../" + bereich + "/main.html";
			parent.kopf.location.href = "../" + bereich + "/kopf_nop.html";
		}