When loading a document from one origin, a script loaded from a different origin cannot get or set certain predefined properties of certain browser and HTML objects in a window or frame. |
Origin is defined as protocol://host, where host may include optional parts of URL including :port, part of an URL. |
Any applets in the document are also subject to origin checks when calling JavaScript. |
The same origin policy is the default policy since Netscape 2. |
Properties subject to origin check |