Click the above Key Page link to trigger a set of cascading menus for the Waller key pages. This particular technique requires a JavaScript routine HMenu.js and a Style HMenu.css.
Every technique has different rules for operation.
And I would like to have a consistent way of navigating thoughout the Internet and certainly within any given website. But this is not likely to happen. If you like this sort of thing then by all means go ahead. With this demo the first link would take you to the Sitemap from where all the pages can be reached. It is nice if the sub-menus stay up even if you take the mouse away.