var bname = navigator.appName;
var bver = parseInt(navigator.appVersion);
var zeit = 10000;

function hauptnav()
{
if (bname == "Netscape" && bver < 5) {
 window.document.navhaupt.visibility="show";
 window.document.news.visibility="show";
 }
else if (bname == "Microsoft Internet Explorer" && bver < 5) {
 navhaupt.style.visibility="visible";
 news.style.visibility="visible";
 }
else {
 document.getElementById("navhaupt").style.visibility="visible";
 document.getElementById("news").style.visibility="visible";
 }
window.clearTimeout(zeit);
zeit = window.setTimeout("onofflayers('')",10000);
}

function onofflayers(nameLayer_show)
{
if (bname == "Netscape" && bver < 5) {
 window.document.navkontakt.visibility="hide";
 window.document.navagentur.visibility="hide";
 if (nameLayer_show != '') {
 window.document.layers[''+nameLayer_show].visibility="show"; }}
else if (bname == "Microsoft Internet Explorer" && bver < 5) {
 navkontakt.style.visibility="hidden";
 navagentur.style.visibility="hidden";
 if (nameLayer_show != '') {
 document.all[''+nameLayer_show].style.visibility="visible"; }}
else {
 document.getElementById("navkontakt").style.visibility="hidden";
 document.getElementById("navagentur").style.visibility="hidden";
 if (nameLayer_show != '') {
 document.getElementById(''+nameLayer_show).style.visibility="visible"; }}
window.clearTimeout(zeit);
zeit = window.setTimeout("onofflayers('')",5000);
}