jquery.animateNumbers.js

/***********
Animates element's number to new number with commas
Parameters:
stop (number): number to stop on
commas (boolean): turn commas on/off (default is true)
duration (number): how long in ms (default is 1000)
ease (string): type of easing (default is "swing", others are avaiable from jQuery's easing plugin
Examples:
$("#div").animateNumbers(1234, false, 500, "linear"); // half second linear without commas
$("#div").animateNumbers(1234, true, 2000); // two second swing with commas
$("#div").animateNumbers(4321); // one second swing with commas
This fully expects an element containing an integer
If the number is within copy then separate it with a span and target the span
Inserts and accounts for commas during animation by default
***********/

(function($) {
    $.fn.animateNumbers = function(stop, commas, duration, ease) {
        return this.each(function() {
            var $this = $(this);
            var start = parseInt($this.text().replace(/,/g, ""));
commas = (commas === undefined) ? true : commas;
            $({value: start}).animate({value: stop}, {
             duration: duration == undefined ? 1000 : duration,
             easing: ease == undefined ? "swing" : ease,
             step: function() {
             $this.text(Math.floor(this.value));
if (commas) { $this.text($this.text().replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,")); }
             },
             complete: function() {
             if (parseInt($this.text()) !== stop) {
             $this.text(stop);
if (commas) { $this.text($this.text().replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,")); }
             }
             }
            });
        });
    };
})(jQuery);