function Verif_Date_Chosen ()
{
  var form = document.getElementById('form_bdc_3');
  var i;
  var nb = form.DELIVERY_DATE_ID.length;
  var found = false;
  for (i = 0; i < nb; ++i)
  {
    if (form.DELIVERY_DATE_ID[i].checked)
    {
      found = true;
    }
  }
  if (true == found)
  {
    document.getElementById('mesg_no_date').style.display = 'none';
    return true;
  }
  else
  {
    document.getElementById('mesg_no_date').style.display = 'block';
    return false;
  }
}  // Verif_Date_Chosen (form)