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

Sorry to bring up an old thread, but here is a little manual for those who (like me!) don't see how Eli Grey's example works:

var test = new Object();
test.watch("elem", function(prop,oldval,newval){
    //Your code
    return newval;
});

Hope this can help someone