rear demister switch.

[Bludger]

My honda has a demister switch with a push on/push off configuration.

I have in my possession the same switch and for the same car, but only its a momentary push on configuration. On other cars with this type switch, the demister turns on when you push the button and turns off when you push it again OR after a said period of time.

What do i need (any additional hardware) to run the second switch that is mentioned....

thanks in advance.