https://marchforbabies.org/Scripts/marketo_helper.js?rnd=20210216

1$(function () {
2    // read marketo cookie and put it under current domain
3    let _mkto_trk = readCookie("_mkto_trk");
4    if (!_mkto_trk) return;
5
6    let domain = window.location.hostname;
7    setCookie('_mkto_trk_local', _mkto_trk, domain);
8
9
10    function setCookie(cookieName, cookieValue, domain) {
11        var myDate = new Date();
12        myDate.setMonth(myDate.getMonth() + 1);
13        document.cookie = cookieName + "=" + cookieValue + ";expires=" + myDate
14            + ";domain=" + domain + ";path=/";
15    }
16
17    function readCookie(name) {
18        var cookiename = name + "=";
19        var ca = document.cookie.split(';');
20        for (var i = 0; i < ca.length; i++) {
21            var c = ca[i];
22            while (c.charAt(0) == ' ') c = c.substring(1, c.length);
23            if (c.indexOf(cookiename) == 0) return c.substring(cookiename.length, c.length);
24        }
25        return null;
26    }
27});