$sql .= " AND ".TB_PREF."stock_master.stock_id RLIKE ".db_escape($regexp);
else
$sql .= " AND ".TB_PREF."stock_master.stock_id LIKE ".db_escape($item_like);
$sql .= " AND ".TB_PREF."stock_master.stock_id RLIKE ".db_escape($regexp);
else
$sql .= " AND ".TB_PREF."stock_master.stock_id LIKE ".db_escape($item_like);