URL parameters in xsl

Hi all, am a newcomer to xsl I desperately need a way to extract the uid parameter from a URL (eg. http://192.168.22.105/default.asp?uid=2) and use it as a variable for if statements within xsl. 

I've tried everything and while I can write the uid to the xsl template I can't call it as a variable in if/match statement.

Please help! ;)

martin

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