Pageplus and Webplus could have an option to be able to view the various links between your pages. Ie: a box marked 'homepage' (or whatever you had called it) at the top, showing all the pages linked to it underneath, and so on.
This would be useful for making a website more userfriendly, and for eliminating redundant links. Plus, it would look good as well!
I think you're confusing the 'cascading' (dropdown) effect of DHTML (Dynamic HTML) menus with the 'cascading' (trickle down) of style sheet definitions as implemented by CSS. CSS overrides the browser's default settings for displaying the content of a web page, e.g.
font-family: Arial; font-weight: bold; font-size: 8pt; color: red
to tell the browser to use 8pt Arial Bold red type instead of the usual Times New Roman black.