computer & internet

How do I get internet on a computer that has no connection? I have 3 computers one is hooked up to the internet and has a wireless connection for the laptop but the other computer has no internet and don't have a phone jack; is there a way or a device that can give that computer internet or make it realize the wireless connection is there.

[(TKC)-o]T3[o]

You need something like this: CLICK

or this: CLICK

depending on if you have a PCI slot available, or want to go the easier route and just get a USB adapter.