The JavaScript below contains the template that must be used when setting up the tracking script.

<script type="text/javascript">
	var _ctq = _ctq || [];
	_ctq.push(['setSiteId', Site ID]);
	_ctq.push(['requires', [Group 1, Group 2, ..]]);
	// Insert calls to replacement methods here
	_ctq.push(['trackPageView']);

	(function() {
		var wca = document.createElement('script'); wca.type = 'text/javascript'; wca.async = !0;
		wca.src = "//web-call-analytics.com/wca.js";
		var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(wca, s);
	})();
</script>

Calls to replacement methods (described in the Methods section) must be inserted into this tracking script to enable number switching.