Slide Down navBar via the ToolBar?

Hi. Has anyone implemented a slide-down navBar from the ToolBar? I am using a "Fullscreen" position mode Toolbar and displaying the navBar with it when the body is tapped is non-desirable. I would like the user to tap on the body to open the toolbar as usual but not display the navBar until they tap on a button within the Toolbar.

Any ideas or code snippets?

Any help will be appreciated: I'm a newbie to jQ (Java).