Listening for variable changes in JavaScript

Question

Is it possible to have an event in JS that fires when the value of a certain variable changes? JQuery is accepted.

Answer 1

For those tuning in a couple years later:

A solution for most browsers (and IE6+) is available that uses the onpropertychange event and the newer spec defineProperty. The slight catch is that you'll need to make your variable a dom object.

Full details:

http://johndyer.name/native-browser-get-set-properties-in-javascript/