Login issues - plzzz help =)

hey all,

im trying to think of how i should do this i want to have 1 login preferrably that will allow the client to access several secure pages and i want the admin to have access to all the secure pages?

i have aready made a login on another site with php and a database and that works fine but its just dealing with different permissions or levels…could anyone plzz pass me in the direction of any tutorials of this or if they know how to do it to plzz share with me =)

cheers peeps!