Here I am make one application which is fully remote based.
only once all js and css loaded. So I want need solution for session expired.
Means when ajax request come to controller, it will be authenticated first, for session if session expired then I want to redirect to login page relogin.
[EDIT - @Brad]
Let's try and clarify your requirement..
1) make request to server via Ajax
2) server responds with HTTP 401, not authorized
3) Ajax recognises 401 status and redirects to Login page
4) login success,
5) then old request executed. means step 1 request executes.
6) but I want dont want to execute that step-1 request but want to execute home page everytime.