jquery: capturing show / hide event of a div

I have a div called MyDiv and I have some code th开发者_高级运维at hides and shows the div. I also have two functions, called functionA and functionB that I want to run respectively on the show and the hide event associated with MyDiv. I DO NOT want to call functionA and functionB from the code that shows and hides the div!

Is this even possible? If so, how is is done. Thanks for your suggestions.

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Try jQuery.hook() : http://plugins.jquery.com/plugin-tags/event-handling