dataLayer = [];
<!-- Google Tag Manager -->
        (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', 'GTM-TZTCBQF');
  
<!-- End Google Tag Manager -->

//login submit form
window.addEventListener('load', function() {
    var loginForm = document.querySelector("form[action='/Account/Login']");
    if (loginForm !== null) {
        loginForm.onsubmit = function(){ 
            var email = document.getElementById("Email").value;  
            console.log("login by " + email);  
            if (email !== null && email.length > 0) {
                var _hsq = window._hsq = window._hsq || [];
                _hsq.push(["identify",{
                    email: email
                }]);
                _hsq.push(["trackEvent", {
                    id: "000009277954"
                }]);
            }
            return true;
        }
    }
    var registerForm = document.querySelector("form[action='/Account/Register']");
    if (registerForm !== null) {
        registerForm.onsubmit = function(){ 
            var email = document.getElementById("Email").value;  
            console.log("registration by " + email);  
            if (email !== null && email.length > 0) {
                var _hsq = window._hsq = window._hsq || [];
                _hsq.push(["identify",{
                    email: email
                }]);
                _hsq.push(["trackEvent", {
                    id: "000010579102"
                }]);
            }
            return true;
        }
    }  
});