tag manager

<body{% if BodyClass is not empty %} class="{{ BodyClass }}"{% endif %}>
{% if Site.option('ga_tag_manager_id') is not empty %}
    <!-- Google Tag Manager -->
    <noscript><iframe src="//www.googletagmanager.com/ns.html?id={{ objSite.option('ga_tag_manager_id') }}"
                      height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
    <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
                new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
                j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
                '//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
        })(window,document,'script','dataLayer','{{ objSite.option('ga_tag_manager_id') }}');</script>
    <!-- End Google Tag Manager -->
{% endif %}