mootools slideIn implementation for keyboard users

an example of a better way to implement a "more options" type panel using the mootools javascript framework's Fx.Slide functions, while avoiding the issue of keyboard users being forced to tab through off-screen links when the panel is not visible.

the solution involves actually removing the panel from the DOM via display:none when a slideOut function has completed, and setting display:block before initiating any slide effect.

more options

some bogus links to test the effect on keyboard navigation when the panel's state is changed.

see the commented javascript source for details.