$pytanie='select id_towaru from towar';

$wynik=mysql_query($pytanie) or die (mysql_error);

while ($line = mysql_fetch_assoc($wynik)) {

     while(list($col_name, $col_value) = each($line)) {

            if ($col_name=='id_towaru') {

                              $pytanie_2="insert into uzytkownik values(0,1,$col_value)";

             }

    }

     mysql_query($pytanie_2)or die (mysql_error);



}