tmp.js

$(document).ready(function () {

    var getCookieForMarketo = function (name) {
        if (arguments.length === 0 && typeof opts !== 'string') {
            return;
        }

        var match = document.cookie.match('(?:^|; )' + name + '=([^;]+)');

        if (match) {
            return match[1];
        } else {
            return 'NULL';
        }
    };
    
    if (typeof MktoForms2 === 'object') {
        MktoForms2.whenReady(function (form) {

            // Add hidden fields
            form.addHiddenFields({
                UTMCampaign: getCookieForMarketo('utm_campaign'),
                UTMSource: getCookieForMarketo('utm_source'),
                UTMMedium: getCookieForMarketo('utm_medium'),
                UTMTerm: getCookieForMarketo('utm_term'),
                UTMContent: getCookieForMarketo('utm_content')
            });
            
            // Send an event to GA then redirect to destination URL after 200ms
            form.onSuccess(function (form, url) {
                ga('send', 'event', 'Landing Pages', 'Form Filled', 'Name of Landing Page', {
                    hitCallback: function () {
                        window.location.href = url;
                    }
                });
                
                return false;
            });

        });
    }

});