您如何使用jQuery Ajax模仿YouTube手表操作区域的UI行为？

When watching a YouTube video, a user can click "Share" or "Playlists" and a panel containing relevant FORM elements will appear below it. I would really like to find a simple jQuery example that shows how to implement a behavior very much like it -- just the UI behavior -- complete with the "close" option.When watching a YouTube video, a user can click