Sorting a xml data based on html column clicks

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Javascript

XML

XSLT

I have a xml file that is tranformed into html table with xslt.
The user invokes the html page that contains the javascript to do the transformation.

_______________________________________
Number | RunIndex| DesignIndex
_______________________________________

------populated table contents-------------

This output is rendered via the XSLT tranformation.
Now how can I sort the contents of the table based on the clicks to the column names. i.e. If I click on Number the table's data has to be sorted based on number.

Michael Kay's post points out that transformation has to be explicit via a html page invocation.

Kindly share your views and suggest a possible alternative, if it is possible.