function goMail()
{
  if
  (
   document.mailform.name_1.value!=''  &&
   document.mailform.name_2.value!=''  &&
   document.mailform.company.value!='' &&
   document.mailform.email.value!=''   &&
   document.mailform.msg.value!=''
  )
  {
   document.mailform.submit();
  }
  else
  {
   alert('Bitte alle Felder ausfuellen!');
  }
}