Secondary usergroup

[Beermonster]

I have this setup which works from if someone is in a usergroup, but is there something different if I add someone to a secondary group as well?

<if condition="$post[usergroupid]==16"><a href="#"><img src="support/supporter.gif" alt="Click here to find out how $post[username] became a supporter"</a></if>

[Opserty]

Use:

<if condition="is_member_of($post, 16)"><a href="#"><img src="support/supporter.gif" alt="Click here to find out how $post[username] became a supporter"</a></if>

[Beermonster]

Thanks that works great