How to make avatar central in postbit?

[BrightStar]

Hiya

How can I make this avatar appear central as per other elements? Do I mess in postbit template or have to do somewhere else?



Thanks

--------------- Added [DATE]1332334864[/DATE] at [TIME]1332334864[/TIME] ---------------

<vb:if condition="$show['avatar']">
<div class="usercenter">
<a class="postuseravatar" href="{vb:link member, {vb:raw post}}" title="{vb:rawphrase {vb:raw post['onlinestatusphrase']}, {vb:raw post.username}}">
<img src="{vb:raw post.avatarurl}" alt="{vb:rawphrase xs_avatar, {vb:raw post.username}}" title="{vb:rawphrase xs_avatar, {vb:raw post.username}}" />
</a>
</div>

The above is the code from the postbit template.