[dartho]

You could edit your footer template and add the following at the very top of the template:

<if condition="$show['quickchooser']">
<div>
	<select name="styleid" onchange="switch_id(this, 'style')">
		<optgroup label="$vbphrase[quick_style_chooser]">
			$quickchooserbits
		</optgroup>
	</select>
</div>
</if>

This code won;t have any effect if you are using the mobile autodetect add-on or the different domain, different style addon as these addons *force* the style...