//Browserabfrage
var bName = navigator.appName;
var version = navigator.appVersion;
                if (bName == "Netscape" && version > "4" && version < "5") fall = "n4";
                else if (document.getElementById) fall = "e5n6";
                else if (bName == "Microsoft Internet Explorer" && version > "4" && version < "5") fall = "e4";
                else fall = "no";

var alt_url = "under_version_4.htm";

function zeigen(name)
	{

	if (fall == "n4")
		{
		document.layers[name].visibility ="show";
		}
	else if (fall == "e5n6")
		{
		document.getElementById(name).style.visibility="visible";
		}
	else if (fall =="e4")
		{
		document.all[name].style.visibility ="visible";
		}
		else
		{
		location.href=alt_url;
		}
	}



function verstecken(name)
	{
	if (fall == "n4")
		{
		document.layers[name].visibility ="hide";
		}
	else if (fall == "e5n6")
		{
		document.getElementById(name).style.visibility="hidden";
		}
	else if (fall =="e4")
		{
		document.all[name].style.visibility="hidden";
		}
	}



//********************************************************
//Hauptnavigation::

function over(punkt) {

	verstecken('delayer');
	verstecken('enlayer');
	verstecken('frlayer');
         verstecken('itlayer');


         zeigen(punkt); //zeigt aktuellen layer

	}

function out(punkt) {

	verstecken(punkt);

	}