How To Access a param from style sheet

Hello:
     I am new to XSLT and also to this list. I have a quick question about
accessing parameters from XSL style sheets. I am using Xalan XSLT processor
in my servlet to transform XML into HTML using XSL.  I am able to set the
stylesheet param using

     xslProcessor.setStylesheetParam("sortBy", "receiverId");

Now I am trying to access this param in the xsl stylesheet to do my
sorting.. I tried something like the following but I am not
having much (/any) luck..

<xsl:sort select="*[name() = $sortBy]"/>

Any help is really appreciated..

Thanks
-- bharat

---------------------------------------------------------------
Bharat Chintapally
CommerceQuest Inc.
bharat.chintapally@xxxxxxxxxxxxxxxxx
New Phone # 813-639-6478
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