<div id="form_container">
    <form class="yui3-widget-bd" id="theme_form" action="#" method="get">
        <fieldset>
            <h3>Update Theme</h3>
            <label for="font_size">Font size:</label>
            <input type="text" size="3" id="font_size" value="16px">

            <label for="heading_color">Heading color:</label>
            <input type="text" size="12" id="heading_color" value="#005A9C">

            <label for="link_hover">Link hover backgound:</label>
            <input type="text" size="12" id="link_hover" value="#ffa">
        </fieldset>
        <input type="submit">
    </form>
</div>
