Get parent page html content from facebook iframe?

Here I am working with facebook application.

I have create page which are working in facebook iframe window.

I want to access main(Parent) window html source from iframe which create by me.

Here I have tried for

parent.document and window.top.document and window.parent

al开发者_Python百科l three are not working in my case. If you have any other idea then let me know,

Thanks

---

You can't access content outside of your IFrame. Otherwise you could change content outside of it and modify Facebook, just because your IFrame is loaded inside of Facebook ;)