Using Google Analytics to asynchronously track page views

First, you'll need to define the _gaq variable and load in the analytics script from googles server. After that, you should be able to call the 'push' method.

var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-XXXXXXX-X']);
_gaq.push(['_trackPageview']);

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

// tracks hit for /some/page/
_gaq.push(['_trackPageview', '/some/page']);

Be sure to substitute 'UA-XXXXXXX-X' with your account ID.

After that's done, load up the page in your browser, open up the console, and look in the network tab. Try loading a few pages to verify that it's asynchronously pushing data to googles servers.

Google uses a .gif image for tracking, so you might try filtering by image and to find request for a file called __utm.gif

If you're using Google Chrome and still having trouble finding it, you might try the tag debugger plugin by ObservePoint or the Official Tag assistant plugin by Google