function show(was) {
	if (document.layers) {
		ebene = document.layers[was];
		ebene.visibility = "show";
	}
	else {
		ebene = document.all[was].style;
		ebene.visibility = "visible";
	}
}

function hide(was) {
	if (document.layers) {
		ebene = document.layers[was];
		ebene.visibility = "hide";
	}
	else {
		ebene = document.all[was].style;
		ebene.visibility = "hidden";
	}
}