JavaScript Resource Load Tracking Time

javascript-load-tracking-time.js

var nexacStartTime;
loadJs('https://e.nexac.com/e/a-1319/s-2915.js', myCallback);

function loadJs(url, callback) {
  TE('Nexac', 'Requested', (typeof referrer !== 'undefined' ? referrer : 'not defined'));
  var js = document.createElement('script');
  js.async = true;
  js.src = url;
  var s = document.getElementsByTagName('script')[0];
  js.onload = callback;
  nexacStartTime = new Date().getTime();
  s.parentNode.insertBefore(js, s);
}

function myCallback(event) {
  var endTime = new Date().getTime();
  var timeSpent = endTime - nexacStartTime;
  TE('Nexac', timeSpent.toString(), (typeof referrer !== 'undefined' ? referrer : 'not defined'));
  _gaq.push(['_trackTiming', 'nexac', 'loading pixel', timeSpent, 'nexac.com', 100]);
}