How to tell which attribute was changed in an onbroadcast event

"Kok Hoor $SolutionX$" <[email protected]> Fri, 11 Oct 2002 14:12:34 +0800

Newsgroups	gmane.comp.mozilla.devel.xpfe,gmane.comp.mozilla.devel.xpcom
Message-ID	<000001c270ed$351d2de0$0300a8c0@kokhoorcompaq>

Hi,

    I am currently writing an onbroadcast handler for
an observes element that observes all attributes changed
event from a broadcaster (attribute="*").

    Is there anyway to tell which attribute was changed?
I tried looking thrue the received event object, but no 
luck.

Regards,
    Kok Hoor