If you want to add client side validation in your web project using jQuery instead of server side validation like PHP, ASP.NET and JSP, then You have to include jQuery validate library in the head ...

Ajax Image Upload using PHP and jQuery In this process the image is selected first and previewed before storing it in to any location . Then using jQuery Ajax, it is send to php script on submit ...

A simple, extensible validation library for PHP with support for filtering and validating any input array along with generating client side validation code.