chrome/common/extensions/docs/examples/tutorials/analytics/popup.js

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

/**
 * Add your Analytics tracking ID here.
 */
var _AnalyticsCode = 'UA-XXXXXX-X';

/**
 * Below is a modified version of the Google Analytics asynchronous tracking
 * code snippet.  It has been modified to pull the HTTPS version of ga.js
 * instead of the default HTTP version.  It is recommended that you use this
 * snippet instead of the standard tracking snippet provided when setting up
 * a Google Analytics account.
 */
var _gaq = _gaq || [];
_gaq.push(['_setAccount', _AnalyticsCode]);
_gaq.push(['_trackPageview']);

(function() {
  var ga = document.createElement('script');
  ga.type = 'text/javascript';
  ga.async = true;
  ga.src = 'https://ssl.google-analytics.com/ga.js';
  var s = document.getElementsByTagName('script')[0];
  s.parentNode.insertBefore(ga, s);
})();

/**
 * Track a click on a button using the asynchronous tracking API.
 *
 * See http://code.google.com/apis/analytics/docs/tracking/asyncTracking.html
 * for information on how to use the asynchronous tracking API.
 */
function trackButtonClick(e) {
  _gaq.push(['_trackEvent', e.target.id, 'clicked']);
}

/**
 * Now set up your event handlers for the popup's `button` elements once the
 * popup's DOM has loaded.
 */
document.addEventListener('DOMContentLoaded', function () {
  var buttons = document.querySelectorAll('button');
  for (var i = 0; i < buttons.length; i++) {
    buttons[i].addEventListener('click', trackButtonClick);
  }
});