function VersionNavigator(Netscape, Explorer) {
  if ((navigator.appVersion.substring(0,3) >= Netscape && navigator.appName == 'Netscape') ||      
      (navigator.appVersion.substring(0,3) >= Explorer && navigator.appName.substring(0,9) == 'Microsoft'))
    return true;
else return false;
}
if (document.images) {

  menu1on = new Image();
  menu1on.src = "bilder/HM_Unternehmen_MO.gif";

  menu1off = new Image();
  menu1off.src = "bilder/HM_Unternehmen.gif";

  menu2on = new Image();
  menu2on.src = "bilder/HM_Leistungs_Profil_MO.gif";

  menu2off = new Image();
  menu2off.src = "bilder/HM_Leistungs_Profil.gif";
  
  menu3on = new Image();
  menu3on.src = "bilder/HM_RuplanSite_MO.gif";

  menu3off = new Image();
  menu3off.src = "bilder/HM_RuplanSite.gif";

  menu4on = new Image();
  menu4on.src = "bilder/UMmo_Home.gif";

  menu4off = new Image();
  menu4off.src = "bilder/UMpv_Home.gif";

  menu5on = new Image();
  menu5on.src = "bilder/UMmo_Kontakt.gif";

  menu5off = new Image();
  menu5off.src = "bilder/UMpv_Kontakt.gif";

  menu6on = new Image();
  menu6on.src = "bilder/UMmo_WebForum.gif";

  menu6off = new Image();
  menu6off.src = "bilder/UMpv_WebForum.gif";

  menu7on = new Image();
  menu7on.src = "bilder/UMmo_Suchen.gif";

  menu7off = new Image();
  menu7off.src = "bilder/UMpv_Suchen.gif";

  smson = new Image();
  smson.src = "bilder/UMmo_SMS-Nachricht.gif";

  smsoff = new Image();
  smsoff.src = "bilder/UMpv_SMS-Nachricht.gif";

  tickeron = new Image();
  tickeron.src = "bilder/BUTmo_TextTicker_Home.gif";

  tickeroff = new Image();
  tickeroff.src = "bilder/BUT_TextTicker_Home.gif";


}

function turnOn(imageName) {
  if (document.images) {
    document[imageName].src = eval(imageName + "on.src");
  }
}

function turnOff(imageName) {
  if (document.images) {
    document[imageName].src = eval(imageName + "off.src");
  }
}