https://www.theatreinchicago.com/includes/add-src-cookie-script.js

1document.addEventListener("DOMContentLoaded", function() {
2           
3    const queryString = window.location.search;
4    if(queryString.length > 0) {
5        const urlParams = new URLSearchParams(queryString);
6        const src = urlParams.get('src')
7        if(src != null && src != undefined && src == 'em') {
8            // Apply setCookie
9            setCookie('src', "em", 365);
10        }
11    }
12
13});
14
15// Set a Cookie
16function setCookie(cName, cValue, expDays) {
17    let date = new Date();
18    date.setTime(date.getTime() + (expDays * 24 * 60 * 60 * 1000));
19    const expires = "expires=" + date.toUTCString();
20    document.cookie = cName + "=" + cValue + "; " + expires + "; path=/";
21}