Thanks jonyjakee for answering.
I've been seeing the webpage you replied and I have a couple of questions.
-This is the Wifi shield you suggest? http://www.cutedigi.com/wireless/wifi/linksprite-cuhead-wifi-shield-for-arduino.html
-Do this shield have a library?
-Have you done a project with this shield?
Sorry for the questions, I want one that works and easy to use 