An iFrame Con = Not A Con

If you have a navigation frame loading different pages into a "main frame," it is hard to create a navigation bar that tells users which page they are on (because the other frame loads the new page without telling the navigation bar).

But it's not, is it? Isn't the active attribute of CSS perfectly suited for such a navigation bar? After you click it, and the new page loads, it will stay highlighted, just as a normal menu should. Only you won't need to use a server-side scripting language such as PHP just to learn which page the user is on so you can highlight that one page. It'll actually save a lot of bandwidth in not needing to reload the menu or process scripts on every page to check which page it is. Just saying...