// ebenen anzeigen und verbergen
/* Funktion Schicht anzeigen */
function show(l_name){
	get_browser();
    if (browser_info){
          if ((browser_info[0] == 'Netscape Navigator')&&(browser_info[2] <= 4))
                    {window.document.layers['' + l_name].visibility = "show";}
          if ((browser_info[0] == 'Netscape Navigator')&&(parseInt(browser_info[2])>4))
					          {document.getElementById(l_name).style.visibility="visible";}
          if ((browser_info[0] == 'Microsoft Internet Explorer')&&(parseInt(browser_info[2])>4))
          					{document.getElementById(l_name).style.visibility = "visible";
							}
                                   }
		  else {document.write('sorry this page wont work with youre browser!<br>browser ='+ browser_info[0]);}                    
									}	
/* Funktion Schicht verbergen */
function hide(l_name){ 
    if (browser_info){
          if ((browser_info[0] == 'Netscape Navigator')&&(parseInt(browser_info[2])<=4))
                    {window.document.layers['' + l_name].visibility = "hide";}
          if ((browser_info[0] == 'Netscape Navigator')&&(parseInt(browser_info[2])>4))
					          {document.getElementById(l_name).style.visibility="hidden";}
          if ((browser_info[0] == 'Microsoft Internet Explorer')&&(parseInt(browser_info[2])>4))
          					{document.getElementById(l_name).style.visibility = "hidden";}
                                   }
		  else {document.write('sorry this page wont work with youre browser!<br>browser ='+ browser_info[0]);}                    
					}
					
//skript zur erkennung von browsern
// aufruf durch "javascript:get_browser()"
// rückgabewerte: 
// browser_info[0]=browser
// browser_info[1]=os
// browser_info[2]=version
var browser , os , version ;
var browser_info = new Array(3);
function get_browser(){
if(parseInt(navigator.appVersion.indexOf('6.')) != -1){
	version = '6'; }else
	if(parseInt(navigator.appVersion.indexOf('5.')) != -1){
		version = '5'; }else
		if(parseInt(navigator.appVersion.indexOf('4.')) != -1){
			version = '4'; }else
			if(parseInt(navigator.appVersion.indexOf('3.')) != -1){
				version = '3'; }else
				if(navigator.appVersion.indexOf('2.') != -1){
				version = '2';}
if(navigator.appName.indexOf('Microsoft') != -1){
browser = 'Microsoft Internet Explorer';
}else
if(navigator.userAgent.indexOf('Opera') != -1){
browser = 'Opera';
}else
if(navigator.appName.indexOf('Netscape') != -1){
browser = 'Netscape Navigator'}
if(navigator.appVersion.indexOf('NT') != -1){
os = 'Windows NT' ; } else
if(parseInt(navigator.appVersion.indexOf('95')) != -1){
os = 'Windows 95'; }
else
if(navigator.appVersion.indexOf('98') != -1){
os = 'Windows 98' ; } else
if(navigator.appVersion.indexOf('Mac') != -1){
os = 'Mac OS';}else
if(navigator.appVersion.indexOf('X') != -1){
os = 'X-Windows' ; } else
if(navigator.appVersion.indexOf('Win') != -1){
os = 'Windows (3.1?)' ; }
if (browser=='Netscape Navigator' && version=='5') {
	version='6'
	if (os == 'Windows (3.1?)') os = 'Windows';
}
browser_info[0]=browser;
browser_info[1]=os;
browser_info[2]=version;
return browser_info;
}