What version of BBCode does this board use?

[AnonymousBroccoli 0]

I'm trying to see if I can get a spoiler tag incorporated into the software of another forum I visit, so I showed the boss lady how it works here. She's curious which version of BBCode is used here. That's about it. Thanks.

[Guest Dazed]

Don't know if this is quite what you're looking for, but the board is Powered by Invision Power Board(U) v1.3 Final © 2003 IPS, Inc.