var browserName = navigator.appName;
var browserVersion = parseInt(navigator.appVersion);
var browser;
 
if (browserName == "Netscape" && browserVersion == 5) {
  browser = "nn6";
}
else if (browserName == "Netscape" && browserVersion == 4) {
  browser = "nn4";
}
else if (browserName == "Microsoft Internet Explorer" && browserVersion == 4 && navigator.appVersion.indexOf("MSIE 7.0") != -1) {
    browser = "ie7";
}
else if (browserName == "Microsoft Internet Explorer" && browserVersion == 4 && navigator.appVersion.indexOf("MSIE 6.0") != -1) {
  browser = "ie6";                      
}
else if (browserName == "Microsoft Internet Explorer" && browserVersion == 4 && navigator.appVersion.indexOf("MSIE 5.5") != -1) {
  browser = "ie55";            
}
else if (browserName == "Microsoft Internet Explorer" && browserVersion == 4 && navigator.appVersion.indexOf("MSIE 5.0") != -1) {
  browser = "ie5";                      
}
else if (browserName == "Microsoft Internet Explorer" && browserVersion == 4) {
  browser = "ie4";
}

if (browser == "ie6"  || browser == "ie7") {
	alert('You are using a fucking old Internet Borwser to watch our Homepage. We are sorry but that doesn\'t work as well. Please download the latest version of Firefox and than go on with Rock \'n\' Roll.');
}

if (browser == "ie6"  || browser == "ie7") {
    document.write('<center><br />You are using a fucking old Internet Borwser to watch our Homepage. We are sorry but that doesn\'t work as well. Please download the latest version of Firefox and than go on with Rock \'n\' Roll.') ;
    document.write('<br /><a target="_blank" href="http://www.mozilla-europe.org/de/">') ;
    document.write('<img border="0" alt="Browser: Firefox!" title="Browser: Firefox!"   src="http://sfx-images.mozilla.org/affiliates/Buttons/110x32/get.gif" /></a>') ;
    document.write('<br /></center>') ;
}
 
/*
if (browser == "nn4" || browser == "ie4") {
    document.write('<center><br /><div class="rot">Sie verwenden zur Betrachtung von Internetseiten einen sehr alten Browser!<br />Daurch ist die Anzeige dieser Webseite nicht richtig.</div>') ;
    document.write('<br /><a target="_blank" href="http://www.mozilla-europe.org/de/">') ;
    document.write('<img border="0" alt="Browser: Firefox!" title="Browser: Firefox!"   src="http://sfx-images.mozilla.org/affiliates/Buttons/110x32/get.gif" /></a>') ;
    document.write('<br /></center>') ;
}
 
if (browser == "ie55" || browser == "ie5") {
    document.write('<center><br /><div class="rot">Sie verwenden zur Betrachtung von Internetseiten einen &#228;lteten Browser!<br />Daurch ist die Anzeige dieser Webseite nicht immer richtig.</div>') ;
    document.write('<br /><a target="_blank" href="http://www.mozilla-europe.org/de/">') ;
    document.write('<img border="0" alt="Browser: Firefox!" title="Browser: Firefox!"   src="http://sfx-images.mozilla.org/affiliates/Buttons/110x32/get.gif" /></a>') ;
    document.write('<br /></center>') ;
}
*/