public function validate_username(Module_Guestbook $m, $arg)
{
$arg = $_POST['username'] = trim($arg);
$max = $m->cfgMaxUsernameLen();
$len = GWF_String::strlen($arg);
if ($len < 1 || $len > $max) {
return $m->lang('err_gbm_username', array(1, $max));
}
return false;
}
