jQuery: A widget or plug-in to create text balloons

I need to create some balloons that will contain text messages, similar to what you would see on a BBS or a blog comments area.

I am not looking for a tool-tips widget - There will be several per page and they will always be displayed.

My requirements:

• Drop shadows, if possible, using images instead of the开发者_StackOverflow社区 box-shadow style for compatibility with IE.

• Visual anchor pin or arrow to point to an origin source.

• Size-to-fit contents.

• Can contain markup. I need to have buttons in the balloons.

• Ideally would be applied via .addClass or similar.

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