How to read javascript objects/vars

[Jawelin]

How could I read the value of some js object (or variable) within a php page ?
Sorry but I'm a newbie at phpinfo-related web vars and functions.

Actually I would need to know, within a page, if that page is opened as a new window or as a frame in a frameset.

Normally I'd do this verification in js checking something like :
[b]if top.name == window.name[b] or similar.

But in php how could read those web page objects ?
Thnx