BySlideMenu is a plugin for Mootools which allow you to easily create a beautiful accordion menu (sliding menu) on any element you want (ul/li, div, p ...) using images and/or text.

http://www.byscripts.info/scripts/javascript-dynamic-accordion-menu

Works horizontally or vertically.

Automatic size - The container width/height can be adjusted automatically.

Menu is expandable by mouseover or by click, as you want.

Menu can be pinned or not, by mouseover or click, you choose.

A default index can be defined.

Can be used with any elements (ul/li, div, p...)

Overflow support.