/**
 * inscription()
 */
function inscription() {

  document.getElementById('error_plaque').style.display = 'none';
  if(!document.getElementById('vehicule_no_plaque').checked
    && document.getElementById('vehicule_plaque').value=='')
    {
      document.getElementById('error_plaque').style.display = 'block';
      return false;
    }
  return true;

  
}