I think what you need is a KVM Swutch. KVM stands for Keyboard, Video, Mouse. It is a switch in witch

I think what you need is a KVM Swutch. KVM stands for Keyboard, Video, Mouse. It is a switch in witch you connect your mouse, your keyboard and your monitor. You can switch between 2 computers by using (in my KVM's case) : Shift + F2F2.
Hope that helps you!