Prefixing the subject with a user field (location) automatically

Prefixing the subject with a user field (location) automatically

Hello,
i'm trying to prefix automatically the subject of a request with the location of the user, via some javascript in the "Field and form rules".
Is it possible to access the value of additional user field? i've added a field location to requester and synchronized it with the active directory, but when i access it via $CS.getValue("LOCALISATION") it returned me "undefined".

How can i access the user additional field and is it possible to have a list of all the fields available.

regards

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