كيف احدف خانة اختيار الجنس ؟؟

<option value="m" selected="selected">{$lang['gender_m']}</option>

    <tr>
	   <td width="20%" class="row1">
	   {$lang['user_gender']}
	   </td>
	   <td width="30%" class="row1">
		  <select name="gender" id="gender_id">
			 <option value="m" selected="selected">{$lang['gender_m']}</option>
			 <option value="f">{$lang['gender_f']}</option>
		  </select>
	   </td>
    </tr>

<input type="hidden" value="f" />