Using Authentication Services in ASP.NET AJAX for Forms Authentication

Authentication is one of the important modules in any website we develop, unless and until there is nothing private on the site or something we explicitly know as being unnecessary. To provide Forms Authentication in ASP.Net AJAX, Authentication Service is packed with the ASP.Net AJAX framework as a web service, which is exposed to the client through a web service proxy script. Means, in server side, the user is verified against the authentication database through the web service which can be called via a JavaScript proxy library which is automatically created by ASP.Net AJAX.