Web Client Validation Bundle Ships
You know that I love the work that the Patterns & Practices Guys do.
Glen Block let me know about this new little gem for web developers.
https://blogs.msdn.com/gblock/archive/2007/10/01/web-client-validation-bundle-shipped.aspx
It uses AJAX methods to combine Client & Server side validation so that you get the great UI experience AND secure use r input.
Check it out !