I have a stored procedure that give some data that are sorted by Col1,
Col2, Col3, Col4.

I have a picture which tells you how I want the data to be presented
in a web form.  Click below to see the picture.

http://gnewsgroup.googlepages.com/rowspanajacentcellswiththesamevalue

It's basically a tabulation of a tree.  For a given column, if an
entry has been displayed, don't repeat it.  Thus we need rowspan (as
shown in the picture) or colspan (not shown in the picture).

I know that I can construct the table by spitting out the tr and td
elements, but I am wondering if there is an easier way to do it.

Any thought to share?