Hit F1 (help) and search for Named Anchors.
The example page is one, very tall page with several named anchors on it. When you click a button it takes you to the designated anchor on the page.
<a href="#top">Link to Top</a>
<a href="#bottom">Link to Bottom</a>
The gliding effect is done with jQuery.
Very nice! I will give this a try!
Edit: It worked beautifully. Thank you!