<form> 안에 <form> 을 넣어야 하는 상황인데요 ㅠㅠ

안녕하세요 ~~ 폼안에 폼을 넣어야 하는 상황인데 어떻게해야할지 모르겠네요 자꾸 망가져요 ㅠㅠ

메인폼은 이렇구요 <아미나 빌더 사용중>

<form name="fwrite" id="fwrite" action="<?php echo $action_url ?>" onsubmit="return fwrite_submit(this);" method="post" enctype="multipart/form-data" autocomplete="off" role="form" class="form-horizontal">

............................

</form>

이건데 제가

// 메인폼시작

<form name="fwrite" id="fwrite" action="<?php echo $action_url ?>" onsubmit="return fwrite_submit(this);" method="post" enctype="multipart/form-data" autocomplete="off" role="form" class="form-horizontal">

// 중간폼

<form name="form">
</form>
  <tr>
    <td height="25">&nbsp;<input name="chkbox" type="checkbox" value="59000" onClick="itemSum(this.form);">&nbsp;슈퍼퍼포먼스 18.2kg</td>
  </tr>
  <tr>
    <td height="25">&nbsp;<input name="chkbox" type="checkbox" value="2000" onClick="itemSum(this.form);">&nbsp;2000원</td>
  </tr>
  <tr>
    <td height="25">&nbsp;<input name="chkbox" type="checkbox" value="3000" onClick="itemSum(this.form);">&nbsp;3000원</td>
  </tr>
  <tr>
    <td height="25">&nbsp;<input name="chkbox" type="checkbox" value="4000" onClick="itemSum(this.form);">&nbsp;4000원</td>
  </tr>
  <tr>
    <td height="25">&nbsp;<input name="chkbox" type="checkbox" value="5000" onClick="itemSum(this.form);">&nbsp;5000원</td>
  </tr>
  <tr>
    <td height="25">&nbsp;합계:&nbsp;<input name="total_sum" type="text" size="20" readonly></td>
  </tr>
</table>

// 중간폼 끝
</form>​

// 메인폼 끝

</form>

이해가 되시는지 모르겠지만 ㅠㅠ 혹시 이게 가능할까요