Polarity change with Relay

I want to control the polarity on a dc motor so I can change the direction,
is it possible to do it with this relay ?

If yes can someone show me a circuit ?
Thank you.

Try my page here
http://www.thebox.myzen.co.uk/Workshop/Motors_1.html

Btw somehow you managed to post your link as a mailto:

JimboZA:
Btw somehow you managed to post your link as a mailto:

Sorry