elenco/menu select value

[Samleo]

echo "<select name='lordo'>";
while($row= mysql_fetch_array($res)){

   if($_POST['lordo']==$row['lordo']
     $sel="selected='selected'";
   else
     $sel='';
   echo "<option ".$sel.">".$row['lordo']."</option>";
   print $row['lordo'];
}
echo "</select>";