Restarting a computer from a website

Background:

At work, we have different passwords for logging into the computer, Lotus Notes, webmail, SAP, and internal websites. People were always forgetting their password and calling in. Our engineering team decided to come up with a "super password" - one password to rule them all (insert LOTR reference here). The only think with this system is that after changing your password, you HAVE to log off of the computer for 15 minutes so that all passwords replicate. Now people are not doing this and calls are coming in for this.

Dilemma:

I would like to know of any code (HTML, JAVA, etc. . . ) that will automatically restart the computer after displaying the "You have successfully changed your password" screen. We only use IE6 here. I've looked online, but haven't seen anything yet.

Thanks in advance