Script Summary: Automatically logs into 30boxes when http://www.30boxes.com/login is opened and the Password manager filled in a username and password.
NOTE: The script also deactivates the encryption 30boxes uses for the login, as this did not work with my FireFox 3. If you don't want this, simply quote out the following line in the script:
document.getElementById('plaintext').checked = true;
by putting // (two slashes) before it!