The original Suckerfish Dropdowns article published in A List Apart proved to be a popular way of implementing lightweight, accessible CSS-based dropdown menus that accommodated Internet Explorer by mimicking the :hover pseudo-class. Well now they're back and they're more accessible, even lighter in weight (just 12 lines of JavaScript), have greater compatibility (they now work in Opera and Safari without a hack in sight) and can have multiple-levels.
Stunning CSS menu - best I've seen so far! After a couple of months playing around with this menu trying to simplify it even further, I have had a breakthrough thanks to an email from Ioan Sameli who had taken one of my menus and produced a variation on the theme, and now with THREE sub levels.