fValidate -- A full-fledged form validation Library
JavaScript -- A Scripting Language of excellency. This saves up a lot of time, at least with respect to the client side form validations. Even then, web developers worldwide feel that it is nightmarish to write validation code in JavaScript.
Sometime back, there was a site called PeterBailey.net which gave a validation library in JavaScript called fValidate. The domain is currently unavailable. A Quick Search in Google revealed the new home of fValidate.
It is a good news for JavaScript lovers worldwide to see thier favorite fValidate back after a brief lull.