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HTML

<fieldset data-role="controlgroup" data-type="horizontal"> 
	<label for="select-choice-month">Month</label>
	<select name="select-choice-month" id="select-choice-month">
		<option>Month</option>
		<option value="jan">January</option>
		<option value="dec">December</option>
		<option value="feb">February</option>
		<option value="mar">March</option>
		<option value="apr">April</option>
		<option value="may">May</option>
		<option value="jun">June</option>
		<option value="jul">July</option>
		<option value="aug">August</option>
		<option value="sep">September</option>
		<option value="oct">October</option>
		<option value="nov">November</option>
		<option value="dec">December</option>
	</select>

	<label for="select-choice-day">Day</label>
	<select name="select-choice-day" id="select-choice-day">
		<option>Day</option>
		<option value="1">1</option>
		<option value="2">2</option>
		<option value="3">3</option>
		<option value="4">4</option>
		<option value="5">5</option>
		<option value="6">6</option>
		<option value="7">7</option>
	</select>

	<label for="select-choice-year">Year</label>
	<select name="select-choice-year" id="select-choice-year">
		<option>Year</option>
		<option value="2011">2011</option>
		<option value="2010">2010</option>
		<option value="2009">2009</option>
		<option value="2008">2008</option>
		<option value="2007">2007</option>
		<option value="2006">2006</option>
		<option value="2005">2005</option>
		<option value="2004">2004</option>
	</select>
</fieldset>