<!--
function untermenu(id) {
	if (document.getElementById(id).className == "unsichtbar") {
		nountermenu();
		document.getElementById(id).className = "sichtbar";
	}
	else {
		nountermenu();

	}
}
function nountermenu() {
	for (var i = 1; i <= 4; i++) {
  		id = 'S' + i;
  		document.getElementById(id).className = "unsichtbar";
  	}
}
//-->