Board Thread:Support Requests - Getting Technical/@comment-25523075-20150416161022/@comment-25995065-20150417080236

From what it sounds like, you'd need some JavaScript to generate a new code and to also make text appear determining if the code was correct/incorrect. This is doable with your wiki's MediaWiki:Common.js page. I don't think I'd be able to do this for you (both for lack of time and don't think I'd be able to do it as efficiently as someone else may be able to), but this is most likely the route you'll need to take and find someone who is able to.