how to do logout in mvc 4.0 mobile application

Refer

2.5. Stage 4: Adding Login and Logout actions - Couchbase

actually in my application we r using nested master pages so for dat we have taken one folder that is Areas folder in that again we have given controllers so defaultly user will login from Home controller after dat login is succeed he will enters in to the controllers in the areas folder 

here my question is under Areas(folder) we have given controllers in this we have given logout button so if user clicks on logout button he has to redirect to Home(Index default login )page this home page is at outside of the Areas folder

how to do this?