In my job there are 6 Computers. 3 of them can access the internet ONLY to the website that services our accounts; they cannot go to yahoo, msn, youtube or anything else. The other three can go to any website. Right now the website that we use for our accounts is temporarlly moved to another address so the 3 computers that have restricted access to the internet cannot log in to it. The network admin. is not available but he gave me administrator rights. How can I "unrestrict" so to speak those computers so that they can log in to our site?
Also I keep getting these messages every time my browser refreshes or changes:

A Runtime error has occurred
Do you wish to debug?
Line xxx
The pagetracker is undefined


What is it?