I don't think there's anything for Java- that would also require Java programming staff for the Wiki- but I'm not sure about Javascript. I'd be willing to help with Javascript if we could get it implemented somehow, and I'm pretty sure anyone that wanted to help in that respect could learn JS really quick since it's easy scripting
That would require Javascripting or something, wouldn't it? I'm pretty sure only basic static PHP things are in Wiki's by default- that would have to be done by hand if that's what you mean.