<form  action="<?php echo $_SERVER['PHP_SELF'];?>" method="post">
    <table border=0>
    <tr>
      <td>K�rper:
      </td>
      <td>
      <input type="radio" value="1" checked name="koerper">Zylinder &nbsp;&nbsp;&nbsp;
      <input type="radio" value="2" name="koerper">Kreiskegel
      </td>
    </tr>
    <tr>
      <td>Radius:
      </td>
      <td><input type="text" name="radius">
      </td>
    </tr>
    <tr>
      <td>H�he:
      </td>
      <td><input type="text" name="hoehe">
      </td>
    </tr>
    <tr>
      <td></td>
      <td><input type="submit" name="senden" value="Rechnen">
      </td>
    </tr>
    </table>
</form>