building a data element to store info in a cookie on the root domain

launchCookieStorageDataElement.js

/**
 * Steps:
 * 1. Create a data element to retrieve the query parameter; set storage to "none"
 * 2. Create a second data element that sets the cookie on your domain's root
 * 3. Reference the second data element on load of every page (it won't fire if it's not referenced)
 * 4. When you need the info in the cookie, pull it from the data element created in step 2
 */

// check for the query param first (this always overrides a saved value)
var retval = _satellite.getVar("qsp:ex_id");
var cookieName = "launch_ex_id";
var cookieOptions = {
  domain: '.YOURDOMAIN.COM' // be sure to specify your domain/subdomain
}

if (retval) { // if a value was found in the url, set/update the cookie
  _satellite.cookie.set(cookieName, retval, cookieOptions);
} else { // if no value in the url, check for the cookie
  retval = _satellite.cookie.get(cookieName);
}

// return the value
return retval;