[xsl] generate code in xsl to assign system variable?

["Kathy Burke" <Kathy_Burke@xxxxxxxxx>]

I have a <step> element that has an ID attribute, a Start attribute and a
Finish attribute.
In my xsl I create a button if the @Start = yes for any <step> element.

But how/can I generate code in xsl so that when the user clicks on it, the
current System date/time becomes the @Start value? I'm using xmlDocument()
in an aspx page.

Any clues appreciated.

Kathy


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