MVC comes with a validation framework that supports both server-side and client-side validation with very little coding. You can still use this framework with Sitecore MVC if you wish, but it breaks a few fundamental aspects of content management systems, namely that the error messages you use won't be content editable as they are embedded in your code. This article shows how we can use the built-in MVC framework and also allow the messages to be content manageable, and also multi-lingual.
