(function (doc) {
    var script = doc.createElement('script');
    script.src = 'https://www.googletagmanager.com/gtag/js?id=AW-1066383044';
    doc.body.appendChild(script);

    window.dataLayer = window.dataLayer || [];
    function gtag() { dataLayer.push(arguments); }
    gtag('js', new Date());
    gtag('config', 'AW-1066383044');
  })(document)