Sorry, but i didn't understood your question. And i guess no matter what is your question, facebook's source code is private for the staff, and the page itself is in PHP, so there is no way to know the source code without hacking facebook's server or stealing it yourself.
Please do not tell me you are a 10 years old kid trying to hack facebook with notepad, those things are general noways! Sorry for anything, please explain your question better! Thank you!
And i don't think this is the right forum for this kind of question, but whatever...