function SubmitContactForm ()
{
 var TextName = document.getElementById('TextName').value;
 var TextAddress = document.getElementById('TextAddress').value;
 var TextZipCode = document.getElementById('TextZipCode').value;
 var TextCity = document.getElementById('TextCity').value;
 var TextPhoneNumber = document.getElementById('TextPhoneNumber').value;
 var TextEMail = document.getElementById('TextEMail').value;
 var TextMessage = document.getElementById('TextMessage').value;
 
 if (TextName && TextAddress && TextZipCode && TextCity && TextPhoneNumber && TextMessage)
 {
  document.forms.FormContactForm.submit ();
 }
 else
 {
  alert ('U heeft niet alle velden ingevuld. Probeer het opnieuw AUB');
 }
}