function set_values($prefix)
{
global $TPL;
$db = new db_alloc();
$db->query("SELECT * FROM invoiceRepeatDate WHERE invoiceRepeatID = %d", $this->get_id());
while ($row = $db->row()) {
$rows[] = $row["invoiceDate"];
}
$TPL[$prefix . "frequency"] = implode(" ", (array) $rows);
return parent::set_values($prefix);
}