detecting active page

I'm intend to use one flash navigation menu for all html pages on my future site,but I don't know how to detect which page is currently active so my menu can mark that item different then others.I suppose that I must import that data from header of HTML page and make my action-script do the rest of the work,but that's just in my head as a theory and I would like to see some nice example or tutorial for that...

use a serverside language like PHP to set a variable on each page. Pass that variable to flash and use actionscript to do the rest.

Easy way to pass variables into flash is with the swfObject http://blog.deconcept.com/swfobject/

Both http://www.liveactionset.org and http://www.continentalski.com use that sort of deal.

not really needed a serverside language. Since you have more html pages,
then you can just write by hand the pageID after the .swf object.
either use the swfObject or just in the html source of each page, change in these 2 locations:

and in each page, give a different pageID (1,2, ...), then in the flash source,
you will just use: