Speed Page Guard

This is a nearly unbreakable pure JavaScript program. You can get the newest version (which may not be the same as the one demonstrated here) can be found at http://start.at/javascripts/ which will include a utility for user adding. For now, try the demo, view the source-code, and see if you can find out a way to crack this...

In case you get tired of being a hacker-wanna-be ;), the username is "John" and the password is "unlock". Not only this, many new features were added to the new version of Page Guard in my web site as well.