How to get form action right

In a list of links this code is used:

echo '<form action="tinymce/edit_tinymce.php?sort='.$id.'">
        <tr>
          <td>&nbsp;</td>
          <td style="background-color: #E5EDF6"><span class="brodrubrik">Redigera resa till '.$plats.' den '.$datum.'</span></td>
          <td style="background-color: #E5EDF6"><input type="submit" name="B2" id="B2" value="G&aring; dit" >
          </span></td>
          <td>&nbsp;</td>
        </tr>
        </form>';

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The url is correct when in the browser the cursor is put on the button. But when the button is pressed and the new page comes up the url is displayed awkwardly in the browser's address field.
I had expected to get http://www.whaterver.com/tinymce/edit_tinymce.php?sort=x but instead I get http://www.whaterver.com/tinymce/edit_tinymce.php?B2=G%E5+dit.

Please, experts, teach me how to get it right.