Is JavaScript validation bad?

Question

It has been long time since we have been validating our forms using JavaScript. I am sure this must be the case with most other developers.

Question:

What if the

Answer 1

Client-side (Javascript) validation is about usability, nothing else. If the cost of implementing is not worth the perceived increase in usability, then don't spend the time on it. These days it's pretty easy to do though!

I don't think you can do without server-side validation, however, since this is the only thing that provides you with any security.