If I'm reading that correctly, it sounds like you want something AJAX-y to dynamically update a single page without the user having to reload it. If that's the case then something like CGI::Ajax would probably be worth looking at.

If you have a sufficiently small amount of data you could 'cheat' somewhat by loading all the data into a number of <DIV>s with all but one styled with visibility: hidden; and then use Javascript to show and hide them on the fly.

Hope that helps