How can I prevent JavaScript in an iFrame to access properties of the outer site, even if the iFrame's content comes from the same origin?

Question

Basically I want to have an iFrame which always restricts it\'s content as if it comes from a different domain, even if the content comes from the same origin.

Is th

Answer 1

This will hide window.parent in the child frame/window, but not the top property.

BUT the window.parent property is STILL accessible till the end of the onload event of the child window/frame.