How to change strings of this guitar?

I've had this guitar for about 5 months and i've never changed the strings so i bought them but then i realized i don't know how to change them!... Please help... this is my guitar a href="http://www.activemusician.com/item--EM.096-1405-021?ref=br&ovchn=BIZ&ovtac=CMP&ovcpn=Guitar%2FB&ovcrn=Fender+CD%2D140SCE+Dreadnought+Acoustic%2DElectric+Guitar+%2D+Natural" rel="nofollow"http://www.activemusician.com/item--EM.0…/a