How do i check if a user is in an additional usergroup?

[Forcemaster]

I got this working but its only for primaryusergroup... so how do i check if they're a member of an additional usergroup

this is for primary:
<if condition="$post['usergroupid']==6"><div class="smallfont">Admin!</div></if>

Plz help :D

[Paul M]

<i>is_member_of($post,n,n,n) </i> where n is the usergroups you want to check (as many or few as you want).