[PHP & MySQL] Problema con listmenu

[Andrea1979]

<select name="styleselect" id="styleselect" class="BoxStyle">
            <?php while($result_style = mysql_fetch_assoc($query_style)) {
                $styleName = $result_style['stl_name']; ?>
  <option <?php if($_POST['style'] == $styleName) { echo("selected");} ?>><?php echo($styleName);?></option>
            <?php } ?>
</select>