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I was recently writing a little javascript function that would traverse up the object graph and apply jQuery selectors to pick the correct parent that I needed. It was a pretty basic function, but I had that gut feeling that this is something that I shouldn’t be writing. It has to be already written by someome. 

Luckily, with jQuery 1.3, it’s part of the core library. New in this version is the closest method which will find the closest parent that matches the selector you pass.