Why do I get permission denied when accessing a frame/window?

In the normal browser security model, a script may only access the properties of documents served from the same domain or IP address, protocol, and port.

Any attempt to access a property in such cases will result in a "Permission Denied" error. Signed scripts or trusted ActiveX objects can overcome this in limited situations.

• http://msdn.microsoft.com/en-us/library/ms533028%28VS.85%29.aspx
• https://developer.mozilla.org/En/Same_origin_policy_for_JavaScript

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