Okay, I have a page on and on this page I have an iframe. What I need to do is on the iframe page, find out what the URL of the main page is.
I have searched around and I know that this is not possible if my iframe page is on a different domain, as that is cross-site scripting. But everywhere I've read says that if the iframe page is on the same domain as the parent page, it should work if I do for instance:
You're correct. Subdomains are still considered separate domains when using iframes, so you, the iframe and the main page can never interact with each other.