Why aren't the changes showing up in the browser?

One of four reasons:

You haven't reloaded the page in your browser. Click the refresh (or reload) button in your browser's icon bar.
You may need to clear your browser's cache. This link tells you how to do it (will open in a popup): java.com/en/download/help/webcache.jsp
AOL and some other internet service providers (ISPs) do something called "browser caching" because it lowers their costs. If your ISP uses browser caching, you sometimes have to wait 24-48 hours for changes to register. If you're using AOL, try using Internet Explorer instead of AOL's browser.
The changes haven't been uploaded to the hosting server yet (whoops!). I'll normally tell you when your changes have been uploaded.