[Zope] Login forms and selective dtml display

[Paul Merrill]

Dear All,

I'm looking for a little help on constructing a simple login/hidden 
section application. What I want to do is thus:

1. User visits my site anonymously and sees a list of links, like A, B, C.

2. Because they are anonymous they don't see the D link (I've put some 
dtml code around the D link so it will only display if they are 
authenticated).

3. On the left hand border, there is a username, password and login 
button. The user enters his username and password and presses the login 
button. The system checks the login and logs the user in with the 
standard Zope login process (whatever that is).

4. If the person is now authenticated, then the page re-displays and 
they see A, B, C, D.

I know that I will need to create an input form for the username and 
password and the Login button will do the submit but once the server 
side received the information how does one call "zope" to log the person 
in? I'm assuming it's some python script that will do the job?

Can someone point me to a code snip?

Thanks,

Paul