(function() {
  var PingPong;

  PingPong = (function() {
    function PingPong(uri1, callback1) {
      this.uri = uri1;
      this.callback = callback1;
    }

    PingPong.prototype.ping = function(uri, callback) {
      var pong, ref, ref1, start, time;
      this.uri = (ref = this.uri) != null ? ref : uri;
      callback = (ref1 = this.callback) != null ? ref1 : callback;
      this.img = new Image();
      start = new Date();
      time = 0;
      this.img.onload = function() {
        return pong();
      };
      this.img.onerror = function() {
        return pong();
      };
      this.img.src = "//" + this.uri + "/?" + new Date().getTime();
      pong = function() {
        time = new Date() - start;
        if (typeof callback === "function") {
          callback(time);
        }
        return this;
      };
      return this;
    };

    return PingPong;

  })();

  window.pingpong = new PingPong;

}).call(this);

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