function checkContact() {

if(document.ContactForm.Name.value == "") {
  alert("Please enter your name. Thanks");
  document.ContactForm.Name.focus();
  return false;
  }
  else
  {
  var Nn = document.ContactForm.Name.value;
  var ZahlNn = Nn.search(/[0-9]/);
  if(ZahlNn != -1)
    {
    alert("No numbers in Name field allowed.");
    document.ContactForm.Name.focus();
    return false;
    }
  }

if(document.ContactForm.email.value == "") {
  alert("Please enter your E-Mail Address. Thanks");
  document.ContactForm.email.focus();
  return false;
  }
  else
  {
  if(document.ContactForm.email.value.search('@') == -1 || document.ContactForm.email.value.length < 8 || document.ContactForm.email.value.search(/[\.]/) == -1) {
    alert("Your E-Mail Address is incorrect.");
    document.ContactForm.email.focus();
    return false;
    }
  }

if(document.ContactForm.Telefon.value != "") {
  var Tel = document.ContactForm.Telefon.value.search(/[a-z, A-Z]/);
  if(Tel != -1) {
    alert("Letters and spaces are not allowed in Fon.");
    document.ContactForm.Telefon.focus();
    return false;
    }
  }

if(document.ContactForm.supportanfrage.value == "") {
  alert("What do you want to tell us?");
  document.ContactForm.supportanfrage.focus();
  return false;
  }

sbm()
}


function sbm()
{
 document.ContactForm.submit();
}