Month

Greetings, I have the following code which populates a dropdown box so a user can select a month. They see the month name and the SELECTED value is the corresponding numeric value 1-12 for the month. However, the selected value for January would be 1. I need the selected value fro January to be 01. How would I accomplish this? <select name="month"> <?PHP

    for ($m=1;$m<=12;$m++)
    {
     $months=date('M', mktime(0, 0, 0, $m, 1));
     if ($m == $_POST['month'])
      echo "<option value=\"{$m}\" SELECTED>{$months}</option>";
     else
      echo "<option value=\"$m\">$months</option>";
    }

?> </select>