title: XSLT Concatenating the values with comma (,)
body: <p>i need to loop through all the nodes in the xml document 
  and append the values with comma ( , )
  finally after the last element i should not have commma (,)</p>
  
  <p>can any body help me.</p>
  
  <p>thanking you,
  Ramana kumar.</p>