DHTML/CSS Wizards: I am looking for free source code to create a simple two-tiered menu. When you hover above a link in a horizontal list of links, each link will display the sublinks in another horizontal bar underneath the first list of links. An example can be seen at macromedia.com. Although I could do this easily enough in Flash, I'm hoping there is some code already out there somewhere in DHTML/CSS/XHTML.
Is there a free or open source alternative to this macromedia flash-based mp3 player?