// JavaScript Document
<!--

function Is() {
var agent = navigator.userAgent.toLowerCase();
this.major = parseInt(navigator.appVersion);
this.minor = parseFloat(navigator.appVersion);
this.ns = ((agent.indexOf('mozilla') != -1) &&
(agent.indexOf('spoofer') == -1) &&
(agent.indexOf('compatible') == -1) &&
(agent.indexOf('opera') == -1) &&
(agent.indexOf('webtv') == -1));
this.ns2 = (this.ns && (this.major == 2));
this.ns3 = (this.ns && (this.major == 3));
this.ns4 = (this.ns && (this.major == 4));
this.ns6 = (this.ns && (this.major >= 5));
this.ie = (agent.indexOf("msie") != -1);
this.ie3 = (this.ie && (this.major < 4));
this.ie4 = (this.ie && (this.major >= 4));
this.ie5 = (this.ie && (this.major == 4) &&
(agent.indexOf("msie 5.0") != -1));
this.ieX = (this.ie && !this.ie3 && !this.ie4);
}

var is = new Is();

function layerObject(id,visibility) {
if (is.ie5||is.ns6){
this.obj = document.getElementById(id).style;
this.obj.visibility = visibility;
return this.obj;
} else if(is.ie4) {
this.obj = document.all[id].style;
this.obj.visibility = visibility;
return this.obj;
} else if(is.ns4) {
this.obj = document.layers[id];
this.obj.visibility = visibility;
return this.obj;
} 
}

var labeldb;
var nachhaltigleben;
var dialog;

function layerSetup() {
labeldb = new layerObject('labeldb','hidden');
nachhaltigleben = new layerObject('nachhaltigleben','hidden');
dialog = new layerObject('dialog','hidden');
}

var old;
var memold;
var subold;

if(document.layers) {
	window.captureEvents(Event.MOUSEDOWN);
	window.onmousedown=do_out;
} else {
	document.onmousedown=do_out;
	}

function show_layer(x) {
	layerObject(x,"visible");
	}
    
function hide_layer(x) {
	layerObject(x,"hidden");
	}
 
function do_menu(x) {
	if(!old)
		old=memold;
    if(old!=x) {
		show_layer(x);
        old=x;
	} else
    	old="";
}

function do_check(x) {
	if(old && old!=x) {
    	hide_layer(old);
        show_layer(x);
		old=x;
		}
	do_submenu();
	}
    
function do_out() {
	if(old)
		hide_layer(old);
	memold=old; old="";
    do_submenu();
    }
    
function do_submenu(x) {
	if(subold) {
    	hide_layer(subold);
        subold="";
	}
	if(x) {
		show_layer(x);
		subold=x;
    }
}
// -->