Is that code correct?
get/set method defined with meta tags looks dubious to me.

For example, on the set you have both a name and value argument. Yet you only use the value.

Why is personName arbitrarily chosen as the property to update?

The code is correct, it was just a way to show that catchall getters and setters could be used.

In any event, it's not useful now since ECMAScript 4 is dead and won't be implemented.

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Nicholas C. Zakas
Author, Professional JavaScript for Web Developers (ISBN 0764579088)
http://www.nczonline.net/