Thread:Project:Support desk/How do I auto-login users into our secured wiki who have already logged in to our site?

I've already got users logging into our portal, but I don't want them to have to re-login to our wiki. How can I automatically log them into the wiki since I already have stored they're authentication credentials (username & password). Can I call the login form directly? And if so, what format is the URL? I've already tried the obvious (using the default login form element id's) to no avail. Could use some help and/or guidance...