How do I use TV and Monitor on one PC

[:job2]

Im getting a new 32" TV and wondered if it was possible to have my computer monitor and my tv both connected to the PC and have a switch of some kind so I can choose which screen its displayed on without having to swap wires over.

I want to be able to watch films from my PC on my big TV :D

+rep to everyone that helps

[N!ck]

KVM switch or having a dual screen setup would be better if you have two outputs on your graphics card.