Comments Format Hack

I’m interested in hacking my comments form a little bit, but I’m in need of some help.

Instead of the standard large textarea field in the comments, I would like to split it in two. To separate out people typing in “Strengths” and “Weaknesses” as if they were writing a review.

Is there a way to use PHP and/or Javascript to do this?

It would be awesome if it could also add the words “Strengths:” and “Weaknesses:” to each paragraph.