Hey, I am working on the application, thought its not OOP currently, I plan to take it further in a year or so. Right now, I have 4 access levels which define what the users can do on the application. Based on the access levels defined, a session varialble is set called $_SESSION['authtype'], and this defines what are the links shown to the user. so basically the session authtype, defines what links are shown to the users, now i am thinking that if a user comes to know of a link whihc he does not have access to, he / she can put that in the url and try to gain access, what i feel is there should be some check on each of the page for the access and if the acess criteria is not met, then the user should be sent back to him home page view. Any ideas on what the best way is to implement something like this? Any help is appreciated. Thanks, Vinay