extract($_POST);
$sesid = session_id();
$i=0;
foreach ($rm_id1 as $id1){
    $room_id = $id1;
    $room_qty = $rm_qty1[$i];
    mysql_query("INSERT into prereservation set session_id ='$sesid',
                 room_id ='$room_id', qty ='$room_qty'");
    $i++;
}