function validateZipCode(zip_code)
{
  if(!zip_code.match(/^\d{5}(-\d{4})?$/))
    return(false);

  return(true);
}

function validatePostalCode(postal_code)
{
  if(!postal_code.match(/^[ABCEGHJKLMNPRSTVXY]\d[A-Z] *\d[A-Z]\d$/i))
    return(false);

  return(true);
}