LEFT JOIN ".TB_PREF."sales_orders so ON so.trans_type=".ST_SALESORDER." AND so.order_no=dt.order_
WHERE dt.type=".ST_SALESINVOICE." AND trans_no=".db_escape($trans_no);
$row = db_fetch(db_query($sql, 'cannot retrieve prepaid invoice factor'));
LEFT JOIN ".TB_PREF."sales_orders so ON so.trans_type=".ST_SALESORDER." AND so.order_no=dt.order_
WHERE dt.type=".ST_SALESINVOICE." AND trans_no=".db_escape($trans_no);
$row = db_fetch(db_query($sql, 'cannot retrieve prepaid invoice factor'));