This webpage will have navigation at the top, a list of rss feeds. Each rss feed has it's own html page or .inc page whichever I decide to use, and I want that page to show up in an Iframe, or another method similar to iframes.

How do I get it so that the URL reflects the index page with a certain rss html page shown in the iframe? I know it's possible, but is it extremely difficult? I want the users to be able to bookmark that page (or have it as a homepage) and have their chosen page load automatically.

Thanks!