What is the correct way to write this conditional?

[dutchbb]

Hello I'm hving trouble writing a conditional in vbulletin:

<if condition="$bbuserinfo['field18'] AND $bbuserinfo[usergroupid] = 5,6,7,13,18">

What's wrong and how should I write it? Basically the comma's are OR...

[Analogpoint]

<if condition="$bbuserinfo['field18'] && is_member_of($bbuserinfo, 5, 6, 7, 13, 18)">

[dutchbb]

Works like a charm, thanks a lot!

[Analogpoint]

You're welcome.