function frameTest(){
  if(top == self) {
    var home = "http://www.gerdt-sylt.de";
    var neueURL = home
    var appVer = navigator.appVersion;
    var NS = (navigator.appName == 'Netscape') && ((appVer.indexOf('3') != -1) || (appVer.indexOf('4') != -1));
    var MSIE = (appVer.indexOf('MSIE 4') != -1);
    if (NS || MSIE)
      location.replace(neueURL);
    else
      location.href = neueURL;
    }
}