function Kontakt(element)
{
  var xcount = 0;
  var xcheck = "";

  if( element.form.T_Vorname.value == "" )
  {
    xcheck = xcheck + "'Vorname'";
    xcount = xcount + 1;
  }
  if( element.form.T_Nachname.value == "" )
  {
    xcheck = (xcount == 0) ? "'Nachname'" : xcheck + ", 'Nachname'";
    xcount = xcount + 1;
  }
  if( element.form.T_Telefon.value == "" )
  {
    xcheck = (xcount == 0) ? "'Telefon'" : xcheck + ", 'Telefon'";
    xcount = xcount + 1;
  }
  if( element.form.T_Email.value == "" )
  {
    xcheck = (xcount == 0) ? "'E-Mail Adresse'" : xcheck + ", 'E-Mail Adresse'";
    xcount = xcount + 1;
  }

  if( xcount == 0 )
  {
    element.form.submit();
  }
  else
  {
    if( xcount == 1 )
      window.alert("Bitte das Feld " + xcheck + " ausfüllen.");
    else
      window.alert("Bitte die Felder " + xcheck + " ausfüllen.");
  }
}