Ajax Based Login Control

How can I have ajax based login on my website home page ? How can I use built in login control in asp.net 2.0 to implement ajax ..

I want a login functionality as we use in gmail kindly guide me please

This really depends on how you do your login page. If you're login page is a seperate page (than the rest of your app), AJAX will only help you in that it will not "flick" when someone enter's wrong credentials.

However, if you have a "login" control that is added to a page if they're not logged in, you can use an AJAX callback to add that control do the page. You can use UpdatePanels if you need.

I have my login Control with in the page but i want to sent only that login form to server and remain rest page as it is ...how to do this pls guide

hello.
well, you do have some options here. for instance, you can use the client side validation services and build a simple form that will do just that.
http://www.asp.net/ajax/documentation/live/tutorials/UsingFormsAuthenticationTutorial.aspx