AJAX in Asp.net [AJAX Quick Overview] AJAX in Asp.net – One major difference between the Web Applications and Desktop Applications is that Web Applications are stateless. That means a web application runs on the client-side and communicates with the server-side in a stateless manner. When we use AJAX in our web form to submit form, JavaScript will make a request to the server, interpret the results and update the current portion of the screen, at that time user would never know anything that data was transmitted to the server.