Reading and writing an xml document from and to a form

Hello Everybody

I have following form:

<form id="form1" name="form1" method="post" action="">
<table align="center" width="600">
  <tr>
    <td  align="center"colspan="2">
    <label>Event Name</label>
      <select name="event_id" id="event_id">
      <option value="Event 22">Event 22</option>
	  <option value="Event 23">Event 23</option>
	  <option value="Event 26">Event 26</option>
      <option value="Event 32">Event 32</option>
      </select>
    </td>
  </tr>
  <tr>
    <td>Turnstile 01</td>
    <td><select multiple="multiple" name="t1[]" id="t1" >
      <option selected="selected" value="VIP">VIP</option>
      <option selected="selected" value="Zone 1">Zone 1</option>
      <option selected="selected" value="Zone 2">Zone 2</option>
      <option selected="selected" value="Zone 3">Zone 3</option>
    </select></td>
    </tr>
  <tr>
    <td>Turnstile 02</td>
    <td><select multiple="multiple" name="t2[]" id="t2">
      <option selected="selected" value="VIP">VIP</option>
      <option selected="selected" value="Zone 1">Zone 1</option>
      <option selected="selected" value="Zone 2">Zone 2</option>
      <option selected="selected" value="Zone 3">Zone 3</option>
    </select></td>
    </tr>
  <tr>
    <td>Turnstile 03</td>
    <td><select multiple="multiple" name="t3[]" id="t3">
      <option selected="selected" value="VIP">VIP</option>
      <option selected="selected" value="Zone 1">Zone 1</option>
      <option selected="selected" value="Zone 2">Zone 2</option>
      <option selected="selected" value="Zone 3">Zone 3</option>
    </select></td>
    </tr>
  <tr>
    <td>Turnstile 04</td>
    <td><select multiple="multiple" name="t4[]" id="t4">
      <option selected="selected" value="VIP">VIP</option>
      <option selected="selected" value="Zone 1">Zone 1</option>
      <option selected="selected" value="Zone 2">Zone 2</option>
      <option selected="selected" value="Zone 3">Zone 3</option>
    </select></td>
    </tr>
  <tr>
    <td>Turnstile 05</td>
    <td><select multiple="multiple" name="t5[]" id="t5">
      <option selected="selected" value="VIP">VIP</option>
      <option selected="selected" value="Zone 1">Zone 1</option>
      <option selected="selected" value="Zone 2">Zone 2</option>
      <option selected="selected" value="Zone 3">Zone 3</option>
    </select></td>
    </tr>
  <tr>
    <td>Turnstile 06</td>
    <td><select multiple="multiple" name="t6[]" id="t6">
      <option selected="selected" value="VIP">VIP</option>
      <option selected="selected" value="Zone 1">Zone 1</option>
      <option selected="selected" value="Zone 2">Zone 2</option>
      <option selected="selected" value="Zone 3">Zone 3</option>
    </select></td>
  </tr>
  <tr>
    <td  align="center"colspan="8">
    <input name="submit" type="button" value="Generate XML" />
    </td>
  </tr>
</table>
</form>

and the corresponding xml document:

<?xml version="1.0" encoding="utf-8"?>
<event timeout_reuse="60" id="22">
  <turnstile name="1">
    <category value="VVIP"></category>
    <category value="Zone 1"></category>
    <category value="Zone 2"></category>
    <category value="Zone 3"></category>
  </turnstile>
  <turnstile name="2">
    <category value="VVIP"></category>
    <category value="Zone 1"></category>
    <category value="Zone 2"></category>
    <category value="Zone 3"></category>
  </turnstile>
  <turnstile name="3">
    <category value="VVIP"></category>
    <category value="Zone 1"></category>
    <category value="Zone 2"></category>
    <category value="Zone 3"></category>
  </turnstile>
  <turnstile name="4">
    <category value="VVIP"></category>
    <category value="Zone 1"></category>
    <category value="Zone 2"></category>
    <category value="Zone 3"></category>
  </turnstile>
  <turnstile name="4">
    <category value="VVIP"></category>
    <category value="Zone 1"></category>
    <category value="Zone 2"></category>
    <category value="Zone 3"></category>
  </turnstile>
  <turnstile name="5">
    <category value="VVIP"></category>
    <category value="Zone 1"></category>
    <category value="Zone 2"></category>
    <category value="Zone 3"></category>
  </turnstile>
  <turnstile name="6">
    <category value="VVIP"></category>
    <category value="Zone 1"></category>
    <category value="Zone 2"></category>
    <category value="Zone 3"></category>
  </turnstile>
</event>

Is it possible to read the information of the xml document into the form and write new selections back to the xml document.

Any help would be greatly appreciated !!!

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