var expires = new Date(); expires.setTime(expires.getTime() + 60*24*60*60*1000); expires = expires.toUTCString();

if (!document.cookie.match(/fs_referrer=/) && document.referrer != '' && !document.referrer.match(/https?:\/\/[^\/]*formstack\.com/))
    document.cookie = "fs_referrer=" + document.referrer + "; domain=formstack.com; path=/; expires=" + expires + ";";

if (!document.cookie.match(/fs_campaign/)) {
    var matches = /[^\w](\wa=[^\&]+)/i.exec(window.location.search);
    if (matches) document.cookie = "fs_campaign=" + matches[1] + '|' + (new Date()).toUTCString() + "; domain=formstack.com; path=/; expires=" + expires + ";";
}