Eloqua tracking script - slightly better namespacing

eloqua_tracking_script.js

/**
 * @file Eloqua visitor tracking.
 */

var Eloqua = Eloqua || {};
(function(Eloqua, window, _elqQ) {

  Eloqua.timerId = null;
  Eloqua.timeout = 5;

  /**
   * Retrieve Eloqua GUID and set form field value.
   *
   * Copied from Eloqua docs (and namespaced)...
   * https://docs.oracle.com/cloud/latest/marketingcs_gs/OMCAA/#Help/EloquaAsynchronousTrackingScripts/Tasks/RepostingExternalForms.htm
   *
   * @todo Create promise function to retrieve GUID vs this nonsense.
   */
  Eloqua.waitForEloquaGUID = function () {
    if (!!(Eloqua.timerId)) {
      if (Eloqua.timeout == 0) {
        return;
      }
      if (typeof window.GetElqCustomerGUID === 'function') {
        document.getElementById('signup-form').elements.elqCustomerGUID.value = GetElqCustomerGUID();
        return;
      }
      Eloqua.timeout -= 1;
    }
    Eloqua.timerId = setTimeout(Eloqua.waitForEloquaGUID, 500);
    return;
  };

  // Fire on window load.
  window.onload = Eloqua.waitForEloquaGUID;

  // Issue request for ID from Eloqua server.
  _elqQ.push(['elqGetCustomerGUID']);

}(Eloqua, window, _elqQ));