I have a situation where I would like to be able to rate a users password in the web interface to my system, so that before they hit submit they know if they have a bad password.

Key Requirements:

• Must be able to rate the password, not just pass/fail.


• Should disable the form if the password is below a threshhold, so the user can't submit it.


• Look nice. :)


• Not use jQuery - we're currently using Mochikit and Y!UI in this system.

I've found many password meters written in jQuery, and things like http://www.passwordmeter.com/ that are too verbose.

Can anyone suggest a good drop in javascript password rater I can use, or give an example of how to write one?