The remote ?on button?. :)

Hi
My friend just gave me his old computer ?AMD 500..yap it is OLD.
And I don?t have any room for that in my chamber.
I put the computer in my closed to use it like a apache/php..server.
I want to start the computer from my desk…
Haw can I put the ?on button? from my case, on my desk?
I fink it should be simple, like putting 2 wires in the case (in the on button) and some how making a switch mechanism?How can I do this ?

By.