Outputting dynamically

Hi:

I want to pass the node attributes name as an
parameter to the XSLT file to transform a XML file.
For example:

<customer id="1">
  <order id="122" >
     <orderdet date="12/12/02">
       <item itemid="145" desc="hammer" qty="2"/>
       <item itemid="145" desc="nails" qty="6"/>
     </orderdet>
  </order>
</customer>

Then I would have in the XSLT file something like or
if someone can come with a better idea:

<xsl:param name="attr" select"'itemid|desc'"/>

and based on that I want to ouput only these
attributes being passed.
Any suggestions, 
thanks.

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