(function($){
  $.bitly = function(longUrl, callback) {
    $.getJSON("http://api.bit.ly/shorten?callback=?", {
      longUrl: longUrl,
      version: "2.0.1",
      apiKey:  "R_8dd420bd9421fb44b3bea15ea681e226",
      login:   "audience"
    }, function(data){
      callback(data.errorCode == 0 ? data.results[longUrl].shortUrl : longUrl)
    })
  }
})(jQuery);