Hello all, I need help with switch leads. Though search I did, I was not able to find the information needed.

I have a Av Momentary illuminated purple ring switch:http://www.thecustomsabershop.com/12...itch-P926.aspx

It has four leads: a positive on the top, negative on the bottom, and two unmarked on either side. Can someone please clarify what each lead is for?

ALSO, when testing with my power supply and resistor, the light is on all the time. How do I get it to only light up when pressed.