How to dynamically change nested sort order?

["Jixian Chen" <jixian_chen at hotmail dot com>]

I am working on a roll-up report which have three nested sort/order-by. 
Depend on the user's choice, all three levels of sort can change from 
ascending to descending. I am using server side xml/xsl. Is there anywhere 
to dynamically changed the sort order using VB's MSXML.DOMDocument object? 
Using the DOM, is there anywhere to identify different for-each statements?

Here is a outline of my xsl:

<xsl:for-each select="ORG" order-by="ORG_NAME">
   ...html codes...

   <xsl:for-each select="Dept" order-by="Dept_Name">

   ...html codes...

     <xsl:for-each select="Unit" order-by="Unit_Name">
      ....html codes....

     </xsl:for-each>
   </xsl:for-each>
</xsl:for-each>

Thanks




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