if (document.images) 

		{

        img1on = new Image();      

        img1on.src = "bilder/navigation/home_a.gif"; 

        img2on = new Image(); 

        img2on.src = "bilder/navigation/unternehmen_a.gif";  

        img3on = new Image();

        img3on.src = "bilder/navigation/produkte_a.gif";

        img5on = new Image();

        img5on.src = "bilder/navigation/kontakt_a.gif";

  
        img1off = new Image();      

        img1off.src = "bilder/navigation/home.gif"; 

        img2off = new Image(); 

        img2off.src = "bilder/navigation/unternehmen.gif";  

        img3off = new Image();

        img3off.src = "bilder/navigation/produkte.gif";

        img5off = new Image();

        img5off.src = "bilder/navigation/kontakt.gif";

 
	}

	function imgAct(imgName) {
		if (document.images) {
			document[imgName].src = eval(imgName + "on.src");

		}
	}

	function imgInact(imgName) {
		if (document.images) {
			document[imgName].src = eval(imgName + "off.src");

		}
	}

  // Welcher Browser
userAgent = navigator.userAgent.toLowerCase();
n4 = document.layers;                                             
ie = (document.all && userAgent.indexOf("mac")<0);                
w3c = document.documentElement;                                   
                                                                  

function layeroff(whichlayer) {

if (n4) {
	eval("document.layers['"+whichlayer+"'].visibility = 'hide'");
}

if ((ie) || (w3c)) {
	document.getElementById(whichlayer).style.visibility = "hidden";
}

}



function layeron(whichlayer) {

if (n4) {
	eval("document.layers['"+whichlayer+"'].visibility = 'show'");
}

if ((ie) || (w3c)) {
	document.getElementById(whichlayer).style.visibility = "visible";
}

}

function showLayer(whichlayer) {
	if (oldLayer != '') {
		hideLayer(oldLayer, 1)
	}	
	layeron(whichlayer);	
	if (whichlayer == 'home') {
		imgAct('img1');
	}
	else {
		imgInact('img1');
	}	
	if (whichlayer == 'unternehmen') {
		imgAct('img2');
	}	
	else {
		imgInact('img2');
	}		
	if (whichlayer == 'produkte') {
		imgAct('img3');
	}	
	else {
		imgInact('img3');
	}	
	if (whichlayer == 'kontakt') {
		imgAct('img5');
	}
	else {
		imgInact('img5');
	}		
	oldLayer = whichlayer;
}
function hideLayer(whichlayer, hidemain) {
	layeroff(whichlayer);
	if (whichlayer == 'home') {
		imgInact('img1');
	}
	if (whichlayer == 'unternehmen') {
		imgInact('img2');
	}
	if (whichlayer == 'produkte') {
		imgInact('img3');
	}
	if (whichlayer == 'kontakt') {
		imgInact('img5');
	}		

 // Ausser wenn unterbunden, Hauptlayer wieder anzeigen	
	if (!(hidemain)) {
		oldLayer = '';
		if (hauptLayer == 'home') {
			imgAct('img1');
		}
		if (hauptLayer == 'unternehmen') {
			imgAct('img2');
		}	
		if (hauptLayer == 'produkte') {
			imgAct('img3');
		}	
		if (hauptLayer == 'kontakt') {
			imgAct('img5');
		}
	}	
}	


function adresse(name, domain, endung) {
document.write('<a href="mailto:' + name + '@' + domain + '.' + endung + '">' + name + '@' + domain + '.' + endung + '</a>')
}