Menu dropdown is one of the feature that almost every today webs have and it is one of the most popular feature used in the web. In past, such feature need Javascript event. Such as using onMouseOver or onMouseOut event. However, since CSS introduced, the new psuedo classes now have this ability. Also, this solution is work for all major browser, except, of course for the CSS3 juice added, which is currently only worked on web-kit browser such as Chrome and Safari. 🙂