What is the best jQuery plugin for forms validation

What is the best jQuery plugin for forms validation

I'm very new to jQuery (two weeks) so maybe this should be in getting started.

What are the best plugins for forms validation?

So far I've had a cursory look at 3.

jFormer (Looks very attractive since it develops the form for you as well as does validation but does it work as advertised?)


jQuery Validation Plugin (I've experimented a bit with this one but it looks a bit ancient)

I should explain that the forms I'm developing will have quite a few checkbox and radio groups and will require Ajax (which I'm also slowly getting to grips with)

All suggestions welcome.