34 	<tal:if condition="config/google_analytics_key">

    34 	<!-- Google Analytics -->

    35 		<!-- Google Analytics -->

    35 	<tal:if define="ga_key config/google_analytics_key"

    36 		<script type="text/javascript" tal:content="python:'''

    36 			condition="ga_key">

    37 

    37 		<script async

    38 		  var _gaq = _gaq || [];

    38 				tal:attributes="src string:https://www.googletagmanager.com/gtag/js?id=${ga_key}"></script>

    39 		  _gaq.push(['_setAccount', '%(key)s']);

    39 		<script tal:content="python:'''

    40 		  _gaq.push(['_trackPageview']);

    40 			window.dataLayer = window.dataLayer || [];

    41 

    41 			function gtag() {

    42 		  (function() {

    42 				dataLayer.push(arguments);

    43 			var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;

    43 			}

    44 			ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';

    44 			gtag('js', new Date());

    45 			var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);

    45 			gtag('config', '%(key)s');

    46 		  })();

    46 		''' % {'key': ga_key}"></script>

    47 

    48 		''' % {'key': config.google_analytics_key}"></script>

    49 		<!-- end Google Analytics -->