[jQuery] Add a callback to any method

[chrismarx]

I'd like to be able to do something like this

//Extend Function for easy callbacks
Function.prototype.andThen=function(g) {
  var f=this;
  return function() {
    f();g();
  }
};

$('div[class="rating"]').livequery(function(){
        var $this = $(this);
        var opts = function(){
                g.ratingOpts.self = $this;
                g.ratingOpts.curvalue = parseInt($this.attr("rate"));
                return g.ratingOpts;
        }();
        $this.rating(opts);
}).andThen(function(){
    alert("I'm called after livequery has looped through all the div's
with class rating");
});

I realize that touching Function.prototype might not be the best idea.
Is there anything like this out there somewhere?  I would like to have
to touch the plugins, etc, so that scripts can be updated without
having to go through them again and add in callbacks-