This is very interesting and something I have been thinking about. Can you explain this a little further? Would this work with buttons? I have about 5 buttons aligned side by side each other. Then I have a tab which is a movieclip. I would l would like the tab to slide back and forth on top of each button when the appropriate button is selected.
Here is my inspiration. http://www.htc.com

I've already created the buttons and the tab movieclip. I'm just not sure how to arrange this and what the actionscript would look like. I'm using AS3.

I'd appreciate any information, advice or resources you could offer. thanks!