var GEKO = document.getElementById? 1:0;
var NS = document.layers? 1:0;
var IE = document.all? 1:0;

function haupt(untermenue)
{
var hauptmenues = new Array('jungsaenger', 'maenner', 'frauen', 'geschichte', 'kontakte', 'events', 'termine', 'home','gaestebuch', 'links');

for (var menue in hauptmenues)
{
var das_menue = hauptmenues[menue];
if (GEKO) {document.getElementById(das_menue).style.display = 'none';}
else if (NS) {document.layers[das_menue].style.display = 'none';}
else if (IE) {document.all[das_menue].style.display = 'none';}
}

aufklappen(untermenue);
}

function aufklappen(untermenue)
{
if (GEKO) {document.getElementById(untermenue).style.display = 'block';}
else if (NS) {document.layers[untermenue].style.display = 'block';}
else if (IE) {document.all[untermenue].style.display = 'block';}
}

function zuklappen(untermenue)
{
if (GEKO) {document.getElementById(untermenue).style.display = 'none';}
else if (NS) {document.layers[untermenue].style.display = 'none';}
else if (IE) {document.all[untermenue].style.display = 'none';}
}




function switchlayer(Layer_Name)
{
var GEKO = document.getElementById? 1:0;
var NS = document.layers? 1:0;
var IE = document.all? 1:0;

if (GEKO) {document.getElementById(Layer_Name).style.display = (document.getElementById(Layer_Name).style.display =='block') ? 'none' : 'block';}

else if (NS) {document.layers[Layer_Name].style.display = (document.layers[Layer_Name].style.display == 'block') ? 'none' : 'block';}

else if (IE) {document.all[Layer_Name].style.display = (document.all[Layer_Name].style.display == 'block') ? 'none' : 'block';}
}