logout problem??

sir,
the logout code which u have send is not the proper solution coz,by using this code the browser get closed which shuold not happen.to logout properly i think we should empty or clear the browser cache regarding that session object which used in particular application.this doesnt mean that whole of the cache of the browser is cleared,we shold clear the cache regarding that application.hope u understand wat i want to say..for coding plz use sevlet don,t use javascript plzzzzzzzzzzzzzz...