We decided to create this script when we needed a compact CSS drop down menu for a project. Chrome Menu is a CSS and JavaScript hybrid drop down menu. It's easy to configure and search engine friendly. The menu links is based on a list, while the drop down menus are simply regular DIV tags on page. Thanks to JavaScript, the menu supports subtle but important effects such as delay before menu disappearance, and repositioning of the menu if too close to any one of the four corners of the window. The entire menu, including images and external files, is extremely compact. Thanks to CSS, the menu can be styled with a different "theme" easily, just by modifying a few CSS attributes and changing a couple of images' colors.
“DHTML” dropdown menus have notoriously involved nasty big chunks of JavaScript with numerous browser-specific hacks that render any otherwise neat, semantic HTML quite inaccessible. Oh, the dream of a lightweight, accessible, standards-compliant, cross-browser-compatible method! Enter Suckerfish Dropdowns.