what is spry for dreamweaver and how to use it

here is some info about spry . "One of the most dramatic enhancements to Adobe Dreamweaver CS3 is the Spry framework, a new set of tools that you can use to create drop-down menus, collapsible panels, and other advanced features. There are so many Spry features, Adobe added a new Insert Bar to the top of the work area to provide easy access to all of the Spry options.

The following tutorial shows you how to create a horizontal drop-down menu bar for site navigation. (You can also use these steps to create a vertical menu bar by selecting Vertical instead of Horizontal in Step 5.): link