(function ($) {
  $.fn.countTo = function (options) {
    // merge the default plugin settings with the custom options
    options = $.extend({}, $.fn.countTo.defaults, options || {});

    // how many times to update the value, and how much to increment the value on each update
    var loops = Math.ceil(options.speed / options.refreshInterval),
      increment = (options.to - options.from) / loops;

    return $(this).each(function () {
      var _this = this,
        loopCount = 0,
        value = options.from,
        interval = setInterval(updateTimer, options.refreshInterval);

      function updateTimer() {
        value += increment;
        loopCount++;
        $(_this).html(value.toFixed(options.decimals));

        if (typeof options.onUpdate == "function") {
          options.onUpdate.call(_this, value);
        }

        if (loopCount >= loops) {
          clearInterval(interval);
          value = options.to;

          if (typeof options.onComplete == "function") {
            options.onComplete.call(_this, value);
          }
        }
      }
    });
  };

  $.fn.countTo.defaults = {
    from: 0, // the number the element should start at
    to: 100, // the number the element should end at
    speed: 1000, // how long it should take to count between the target numbers
    refreshInterval: 100, // how often the element should be updated
    decimals: 0, // the number of decimal places to show
    onUpdate: null, // callback method for every time the element is updated,
    onComplete: null, // callback method for when the element finishes updating
  };
})(jQuery);