How to insert a combobox to QTextTable cell?

Is it possible to place a combobox into a cell in QTextTable? I try to insert this into QTextEdit but it does not work...

<form name=myform>
<select name=mytextarea>
<option name=one value=one> one </option>
<option name=two value=two> two </option>
<option name=three value=three> three </option>
</select>
</form>

Thanks!

See the Rich Text documentation for the supported HTML subset.