function elm(id)
{
  return document.getElementById(id);
}

function validateAndSubmit()
{
  var organisation = elm('tfOrganisation').value;
  var email = elm('tfEmail').value;
  var phone = elm('tfPhone').value;
  var name = elm('tfName').value;
  var errorFree = true;
  
  if((!organisation)||(!email)||(!phone)||(!name))
    elm('errorMessage').style.display = 'block';
  else
    elm('contactForm').submit();

}