HTML_TreeMenu: Easy aPI to produce a dynamic tree menu

This PHP/Javascript combo allows you to easily create a tree menu. With capable browsers, the menu is dynamic and allows the branches to be expanded/collapsed. This works AFAIK with Internet Explorer 4+, Mozilla, and Netscape Navigator 6+. With other browsers, Opera for example, the menu is static. Also, with Internet Explorer 5+, the status of the expanded/collapsed branches is persistent, (ie it survives a refresh). Each node can have an optional link and icon. This class uses a set of images, these images are available at the example url (http://www.phpguru.org/treemenu.php).