Here are a couple of links for HTML data sets:
Another technique you might want to look into is Spry Tabbed Panels:
(this first reference is a little technical, but a pretty good overview) http://livedocs.adobe.com/en_US/Spry/SDG/help.html?content=WS6FED301A-59A1-45ce-BC1F-11074 3A27FE9.html
A nice reference for Spry in general is here: http://labs.adobe.com/technologies/spry/samples/
Thanks, I looked it over and I was able to create my data set, and used the master detail layout to get the feature I wanted... now I am stuck on how to position it. I tried to put the master column in one div container and the detail in another and it didnt work. How can I position the regions exactly on the webpage and resize them?
I've found Master/Detail to be pretty flexible. Do you have a link to your page online? I couldn't find data set markup in the previous link that you provided.