I need a clarification of what you mean.

Lets say I have 1000's of html files under /members

I want to put static links to the html files.

If the user did not log in from a web form then I want the web server somehow to know they are not logged in and brings up the login page.

If the user did login from an html web page and created a a session cookie I want the web server to allow the access

Thanks/ David J.