form.getData与mini-hidden的问题 - jQuery MiniUI

  <div id="editForm1" style="padding:5px;">
<input class="mini-hidden" name="id"/>
<input class="mini-hidden" name="distributer" value="ZQAD0001" />
<table style="width:100%;">
   <tr>
      <td style="width:80px;">参与活动号码：</td>
      <td style="width:150px;"><input id="user_number" name="user_number" class="mini-textbox" /></td>
   </tr>
   <tr>
      <td>选择参与活动：</td>
      <td><input id="activity_id" name="activity_id" class="mini-combobox" textField="name" valueField="id"/></td>
   </tr>
   <tr>
      <td>选择活动礼品：</td>
      <td><input id="gift_id" name="gift_id" class="mini-combobox" textField="name" valueField="id" /></td>
   </tr>
   <tr><td/><td><button id="saveButton" >确认</button></td></tr>
</table>
  </div>

form = new mini.Form('#editForm1');

$('#saveButton').on('click', function() {
var json, o;

o = form.getData();
json = mini.encode(o);
alert('Save record.\n' + JSON.stringify(o));
});