radio button group with one native button

radio button group with one native button

Hi All,
I am just wondering if it is possible/supported to have a radio button group where only one of the buttons is native (data-role="none").  When I click one of the enhanced buttons, a JS exception happens because there is no widget on the other input.
< fieldset data-input-name="radioGroup1" data-role="controlgroup" id="radioGroup1"><input data-mini="true" data-theme="a" id="item1" name="radioGroup1" type="radio" value="item1"></input><label for="item1">Item1</label><input id="item2" name="radioGroup1" type="radio" value="item2"></input><label for="item2">Item2</label><input id="item3" name="radioGroup1" type="radio" value="item3"></input><label for="item3">Item3</label><input checked="checked" id="item4" name="radioGroup1" type="radio" value="item4"></input><label for="item4">Item4</label><input id="item5" name="radioGroup1" type="radio" value="item5"></input><label for="item5">Item5</label><input data-role="none" id="item6" name="radioGroup1" type="radio" value="item6"></input><label for="item6">Item6</label></fieldset>

thoughts?
thanks,
David