How can I stop the javascript error "_gat is undefined"?

[KB]

Try the following to get rid of this javascript error:

* go to the 'Design' menu and select 'Library'
* on the 'Layouts' tab, expand the 'Google Analytics Markup' group (click the '+')
* double-click on the 'Google Analytics Order Transmission' layout to edit it
* replace the contents of that layout with:

<actinic:block if="%28%3cactinic%3avariable%20name%3d%22IsGoogleAnalyticsEnabled%22%20%2f%3e%20%3d%3d%20true%29%20AND%20%28%3cactinic%3avariable%20name%3d%22PageType%22%20%2f%3e%20%20%3d%3d%20%22Receipt%22%29" >
<script type="text/javascript">
<!--
  var pageTracker = _gat._getTracker("<actinic:variable name="GoogleAnalyticsNumber" />");
  pageTracker._initData();
  pageTracker._trackPageview();

  eval(act_order);
  
  eval(act_item);

  pageTracker._trackTrans();
//-->
</script>
</actinic:block>

* click 'OK'
* then double-click on the 'Google Analytics Tracking Code' layout and replace the contents with:

<actinic:block if="%3cactinic%3avariable%20name%3d%22IsGoogleAnalyticsEnabled%22%20%2f%3e%20%3d%3d%20true" >
<script type="text/javascript">
<!--
	var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
	document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
//-->
</script>
<script type="text/javascript">
<!--
	var pageTracker = _gat._getTracker("<actinic:variable name="GoogleAnalyticsNumber" />");
	pageTracker._initData();
	pageTracker._trackPageview(<actinic:block if="%3cactinic%3avariable%20name%3d%22PageType%22%20%2f%3e%20%3d%3d%20%22Receipt%22">"/receipt.html"</actinic:block>);
//-->
</script>
</actinic:block>

* click 'OK'
* close the Library
* update your site