while ($r = db_rowarr($c)) {
				$con = '';
				foreach ($f as $k => $v) {
					$con .= "{$v}='{$r[$k]}' AND ";
				}
				$con = substr($con, 0, -4);
				q("DELETE FROM {$tbl} WHERE {$con} LIMIT ".($r[$n] - 1));
			}