Runescape wont load!!!! Help

ok i decided to download rsbot and give it a try. i downloaded it and in the readme file it said i m=need to download java jdk or something like that. i did that. rsbot works fine. i went to play runescape without rsbot on runescape.com. now when it loads i get a whitebow on firefox with error,click for details in corner. it says java class loader is not working or something. i went to the website to try and download the latest java, but it still wont work. someone plzz help me get the regular rs bacck working.