no, it's not a simple hide/show, that I can do myself. Actually, I did that in the new version with the Basic/Advanced Settings. I described the problem in the other thread, but I guess you missed that. This is the situation I layed out in the other thread:
So the combination of hiding/showing together with storing values at the same time, that's the challenge. I don't know if that must be done with AJAX or something else, I am not a developer and don't know about that stuff. I just want to mimic the old situation with jQuery, that's all I know.
If you can think you can help, I will send you the theme. Please let me know.