[thelist] <thead> vs. <th>?

[snip]
At 01:02 PM 4/9/2002, Hassan Schroeder wrote:
>Think about the behavior you want: the THEAD identifies one or more
>rows that the user agent may use as a fixed header for the /entire/
>table, allowing the table contents to scroll under it.
[/snip]

I read through the recommendation at
http://www.w3.org/TR/html4/struct/tables.html and searched Google
http://www.google.com/search?hl=en&q=scrolling+table+cells&btnG=Google+Searc
h and I cannot find a method using HTML alone that would allow table cells
to scroll under <thead>. I have some extensive report tables that would
benefit greatly from this and the <thead> 's are already in place. Can
someone point me specifically to something that shows me how to perform the
scrolling maneuver?

TIA!

Jay