Håkon Wium Lie, the inventor of CSS answers various questions.
unobtrusive, CSS based Tab Content script.
A DHTML window script based on the Prototype class.
A tutorial on building a CSS and image based menu with support for active tab.
Opera 9 released! Lots of new features like BitTorrent, content blocker, and widgets.
A CSS, SEO friendly drop down menu. Updated to v 2.0.