submit til iframe i vindue

<form target="winn.framen" METHOD="POST" ACTION="uploader.asp" NAME="form2" ENCTYPE="multipart/form-data">
<input type="hidden" name="mode" value="2">

                <tr>
                    <td class="form_hl" style="width: 150px;" nowrap>Lille eksempel</td>
                    <td></td>
                    <td class="form_field"><input name="FILE1" type="file" class="input" style="width: 300px;" onchange="displayWindow('vait.asp','winn',300,300);document.form2.submit();"></td>
                    <td class="form_field_info"><img src="../../_images/icons/16x16/info.gif" border="0" onMouseOver="showinfo(2);" onMouseOut="hideinfo(2);"></td>
                </tr>
</form>






Hvad skal jeg bruge som target i min form for at den submit'er til en iframe ("framen") i mit windue ("winn")