Using a computer monitor for the Singer's Display

[bryant]

I have hooked up TV sets, even more than one at a time, as second monitors for the singers and audience along with projectors at times. However, how do I get a computer monitor, instead of a TV, as the second display for the singer's monitor.

I mean the computer monitor has no s-video or rca input, just the nine pin one. What do i do with that?
I will be using my backup machine for this: Dell e1505 laptop.