diff --git a/core/misc/ajax.js b/core/misc/ajax.js
index b56392e..e65b2d8 100644
--- a/core/misc/ajax.js
+++ b/core/misc/ajax.js
@@ -110,22 +110,22 @@
    *
    * @augments Error
    *
-   * @param {jqXHR} xmlhttp
+   * @param {jqXHR} jqXHR
    *   jqXHR object used for the failed request.
    * @param {string} uri
    *   The URI where the error occurred.
    * @param {string} customMessage
    *   The custom message.
    */
-  Drupal.AjaxError = function (xmlhttp, uri, customMessage) {
+  Drupal.AjaxError = function (jqXHR, uri, customMessage) {
 
     var statusCode;
     var statusText;
     var pathText;
     var responseText;
     var readyStateText;
-    if (xmlhttp.status) {
-      statusCode = '\n' + Drupal.t('An AJAX HTTP error occurred.') + '\n' + Drupal.t('HTTP Result Code: !status', {'!status': xmlhttp.status});
+    if (jqXHR.status) {
+      statusCode = '\n' + Drupal.t('An AJAX HTTP error occurred.') + '\n' + Drupal.t('HTTP Result Code: !status', {'!status': jqXHR.status});
     }
     else {
       statusCode = '\n' + Drupal.t('An AJAX HTTP request terminated abnormally.');
@@ -133,12 +133,12 @@
     statusCode += '\n' + Drupal.t('Debugging information follows.');
     pathText = '\n' + Drupal.t('Path: !uri', {'!uri': uri});
     statusText = '';
-    // In some cases, when statusCode === 0, xmlhttp.statusText may not be
+    // In some cases, when statusCode === 0, jqXHR.statusText may not be
     // defined. Unfortunately, testing for it with typeof, etc, doesn't seem to
     // catch that and the test causes an exception. So we need to catch the
     // exception here.
     try {
-      statusText = '\n' + Drupal.t('StatusText: !statusText', {'!statusText': $.trim(xmlhttp.statusText)});
+      statusText = '\n' + Drupal.t('StatusText: !statusText', {'!statusText': $.trim(jqXHR.statusText)});
     }
     catch (e) {
       // Empty.
@@ -146,9 +146,9 @@
 
     responseText = '';
     // Again, we don't have a way to know for sure whether accessing
-    // xmlhttp.responseText is going to throw an exception. So we'll catch it.
+    // jqXHR.responseText is going to throw an exception. So we'll catch it.
     try {
-      responseText = '\n' + Drupal.t('ResponseText: !responseText', {'!responseText': $.trim(xmlhttp.responseText)});
+      responseText = '\n' + Drupal.t('ResponseText: !responseText', {'!responseText': $.trim(jqXHR.responseText)});
     }
     catch (e) {
       // Empty.
@@ -159,7 +159,7 @@
     responseText = responseText.replace(/[\n]+\s+/g, '\n');
 
     // We don't need readyState except for status == 0.
-    readyStateText = xmlhttp.status === 0 ? ('\n' + Drupal.t('ReadyState: !readyState', {'!readyState': xmlhttp.readyState})) : '';
+    readyStateText = jqXHR.status === 0 ? ('\n' + Drupal.t('ReadyState: !readyState', {'!readyState': jqXHR.readyState})) : '';
 
     customMessage = customMessage ? ('\n' + Drupal.t('CustomMessage: !customMessage', {'!customMessage': customMessage})) : '';
 
@@ -296,7 +296,7 @@
    *   Speed with which to apply the effect.
    * @prop {string} [method]
    *   Name of the jQuery method used to insert new content in the targeted
-   *   element.
+   *   element.jqXHR, options
    * @prop {object} [progress]
    *   Settings for the display of a user-friendly loader.
    * @prop {string} [progress.type='throbber']
@@ -421,7 +421,7 @@
      * Processed Ajax URL.
      *
      * @type {string}
-     */
+     */jqXHR, options
     this.url = this.url.replace(/\/nojs(\/|$|\?|#)/g, '/ajax$1');
     // If the 'nojs' version of the URL is trusted, also trust the 'ajax'
     // version.
@@ -746,7 +746,7 @@
    * Prepare the Ajax request before it is sent.
    *
    * @param {jqXHR} jqXHR
-   *   Native Ajax object.
+   *   Javascript XHR object.
    * @param {object} options
    *   jQuery.ajax options.
    */
@@ -939,7 +939,7 @@
    * Handler for the form redirection error.
    *
    * @param {object} jqXHR
-   *   Native jqXHR object.
+   *   Javascript XHR object.
    * @param {string} uri
    *   Ajax Request URI.
    * @param {string} [customMessage]