I got world of warcraft the 10 day trial and i m gnna pay for membership but? how do i download the full game the trial gives me the trial version of the game. how do i download the full game so i can log on it. and can i get it from the pc or sometin. on guild wars the client is showed up right away on their page but on wow i cant find the client anywhere. btw still cant pay for membership it keaps asking me for a game card code and i wnna use my credit card.

No you don't HAVE to buy the full version in the stores.
If you go to worldofwarcraft.com and go to account information, there should be an option to upgrade to the full version (you may have to create your account first). I would give you the exact link but I am at work and the site is blocked here.
You will have to pay $20 US for the game and then $13, $14, or $15 a month depending on which option you choose.

I downloaded WoW online and I've been playing for a year