Internet problems

Hi, I have a MacBook Pro, it has a full wifi connection (I have tried both at home and in School, so it can't be my internet) but when I want to open an internetsite, it just turns white? I can open google, but when I want to open the site I want to use it turns white, so basically I can't go on the internet (only google) and i don't know why?? Pleas I need help! :)