var bild1 = new Image();
	var bild2 = new Image();
	var bild3 = new Image();
	var bild4 = new Image();
	var bild5 = new Image();
	var bild6 = new Image();
	var bild7 = new Image();
	var bild8 = new Image();
	var bild9 = new Image();

	bild1.src = "images/menu_n_startseite.gif";
	bild2.src = "images/menu_n_wir_uber_uns.gif";
	bild3.src = "images/menu_n_neufahrzeuge.gif";
	bild4.src = "images/menu_n_gebrauchtwagen.gif";
	bild5.src = "images/menu_n_leihfahrzeuge.gif";
	bild6.src = "images/menu_n_bekleidung.gif";
	bild7.src = "images/menu_n_hit_des_monats.gif";
	bild8.src = "images/menu_n_kontakt.gif";
	bild9.src = "images/menu_n_gaestebuch.gif";

	var bild1a = new Image();
	var bild2a = new Image();
	var bild3a = new Image();
	var bild4a = new Image();
	var bild5a = new Image();
	var bild6a = new Image();
	var bild7a = new Image();
	var bild8a = new Image();
	var bild9a = new Image();

	
	bild1a.src = "images/menu_a_startseite.gif";
	bild2a.src = "images/menu_a_wir_uber_uns.gif";
	bild3a.src = "images/menu_a_neufahrzeuge.gif";
	bild4a.src = "images/menu_a_gebrauchtwagen.gif";
	bild5a.src = "images/menu_a_leihfahrzeuge.gif";
	bild6a.src = "images/menu_a_bekleidung.gif";
	bild7a.src = "images/menu_a_hit_des_monats.gif";
	bild8a.src = "images/menu_a_kontakt.gif";
	bild9a.src = "images/menu_a_gaestebuch.gif";

// global variable deklaration
var activeimage = "undefined";

// main functions
function active(name){
        if(name == activeimage) return;
        if(activeimage != "undefined"){
        document.images[activeimage].src = eval(activeimage+".src");
        }
        activeimage = name;
}
function on(name){

        if(activeimage != name){
                document.images[name].src = eval(name+"a.src");
        }
}
function off(name){
        if(activeimage != name){
                document.images[name].src = eval(name+".src");
        }
}


//-----------------------------------------------------------------------------
// Browser erkennen und Layer-Begriffe initialisieren
//-----------------------------------------------------------------------------
var NS4 = (navigator.appName.indexOf("Netscape") >= 0 &&
                parseFloat(navigator.appVersion) >= 4) ? 1 : 0;
var NS6 = (NS4 && parseFloat(navigator.appVersion) >= 5) ? 1 : 0;
var IE4 = (document.all) ? 1 : 0;
var IE5 = (IE4 && navigator.appVersion.indexOf("5.")) >= 0 ? 1 : 0;
var layerRef = "";
var styleSwitch = "";
var visibleVar = "";
var hideVar = "";
var styleTop = "";
var posiHeight = "";
if (NS6){
NS4 = 0;
}
function init()
{
	if (NS4)
	{
		styleSwitch="";
		visibleVar="show";
		hideVar="hide";
		styleTop=".top";
		posiHeight=".clip.height"
     }
	else
	{ 
		styleSwitch=".style";
		visibleVar="visible";
		hideVar="hidden";
		posiHeight=".offsetHeight"
		
		if (NS6)
		{
			styleTop=".style.top";
        }
		else
		{	
			styleTop=".style.pixelTop";	
		}
	}
}

function GetLayerRef(name)
{
	if (NS4)
	{
		eval(layerRef = "document." + name);
    }
	else
	{
        if (NS6)
		{
			eval(layerRef = "document.getElementById(\'"+name+"\')");
        }
		else
		{
			eval(layerRef = "document.all." + name);
		} 
	} 
	return layerRef;
}
function show_layer(layerName)
{
	var layerRef = GetLayerRef(layerName);
	eval(layerRef+styleSwitch+'.visibility=visibleVar');
}
function hide_layer(layerName)
{
	var layerRef = GetLayerRef(layerName);
	eval(layerRef+styleSwitch+'.visibility=hideVar');
}