You would need to have the same header code in place on each of those pages. Each bit of text after your / is a folder, and in each folder, typically you have a index.html file being served to your website visitors.
There is a method to use a format like this if you are interested:
http://site.com/index.html#home
http://site.com/index.html#aboutus
More information about that technique can be found here: Linking to a specific scene from inside and outside of a Tumult Hype document