function check_param ()
 {var param = window.location.search.toLowerCase();
  if (param.search ("home") != -1)
   {window.frames["MedEFHomeFrame"].location.href = "Home.htm";}
  else if (param.search ("vorstand") != -1)
   {window.frames["MedEFHomeFrame"].location.href = "Vorstand.htm";}
  else if (param.search ("mail") != -1)
   {window.frames["MedEFHomeFrame"].location.href = "Mail.htm";}
  else if (param.search ("impress") != -1)
   {window.frames["MedEFHomeFrame"].location.href = "Impress.htm";}
  else
   {window.frames["MedEFHomeFrame"].location.href = "Home.htm";}}