diff --git a/modules/ext.math.mathjax.enabler.js b/modules/ext.math.mathjax.enabler.js
index 133a83a..df1a09c 100644
--- a/modules/ext.math.mathjax.enabler.js
+++ b/modules/ext.math.mathjax.enabler.js
@@ -1,83 +1,87 @@
 /**
  * From https://en.wikipedia.org/wiki/User:Nageh/mathJax.js
  */
-
-if ( typeof mathJax === 'undefined' ) {
-  mathJax = {};
-}
-
-mathJax.version = '0.2';
-
-mathJax.loaded = false;
-
-mathJax.Config = function() {
-  MathJax.Hub.Config({
-    root: mediaWiki.config.get('wgExtensionAssetsPath') + '/Math/modules/MathJax',
-    config: ['TeX-AMS-texvc_HTML.js'],
-    'v1.0-compatible': false,
-    styles: { '.mtext': { 'font-family': 'sans-serif ! important', 'font-size': '80%' } },
-    displayAlign: 'left',
-    menuSettings: { zoom: 'Click' },
-    'HTML-CSS': { imageFont: null, availableFonts: ['TeX'] }
-  });
-  MathJax.OutputJax.fontDir = mathJax.fontDir = mediaWiki.config.get('wgExtensionAssetsPath') + '/Math/modules/MathJax/fonts';
-};
-
-mathJax.Load = function(element) {
-  if (this.loaded) {
-    return true;
+/*global mathJax:true, MathJax, wikEd:true */
+( function ( mw, $ ) {
+  if ( typeof mathJax === 'undefined' ) {
+    mathJax = {};
   }
 
-  // create configuration element
-  var config = 'mathJax.Config();';
-  var script = document.createElement( 'script' );
-  script.setAttribute( 'type', 'text/x-mathjax-config' );
-  if ( window.opera ) {
-    script.innerHTML = config;
-  } else {
-    script.text = config;
-  }
-  document.getElementsByTagName('head')[0].appendChild( script );
+  mathJax.version = '0.2';
 
-  // create startup element
-  mediaWiki.loader.load('ext.math.mathjax');
+  mathJax.loaded = false;
 
-  this.loaded = true;
+  mathJax.Config = function() {
+    MathJax.Hub.Config({
+      root: mediaWiki.config.get('wgExtensionAssetsPath') + '/Math/modules/MathJax',
+      config: ['TeX-AMS-texvc_HTML.js'],
+      'v1.0-compatible': false,
+      styles: { '.mtext': { 'font-family': 'sans-serif ! important', 'font-size': '80%' } },
+      displayAlign: 'left',
+      menuSettings: { zoom: 'Click' },
+      'HTML-CSS': { imageFont: null, availableFonts: ['TeX'] }
+    });
+    MathJax.OutputJax.fontDir = mathJax.fontDir = mw.config.get('wgExtensionAssetsPath') + '/Math/modules/MathJax/fonts';
+  };
 
-  return false;
-};
-
-mathJax.Init = function() {
-  this.Load( document.getElementById('bodyContent') || document.body );
-
-  // compatibility with wikEd
-  if ( typeof(wikEd) == 'undefined' ) {
-    wikEd = {};
-  }
-  if ( typeof(wikEd.config) == 'undefined' ) {
-    wikEd.config = {};
-  }
-  if ( typeof(wikEd.config.previewHook) == 'undefined' ) {
-    wikEd.config.previewHook = [];
-  }
-  wikEd.config.previewHook.push( function(){
-    if (window.mathJax.Load(document.getElementById('wikEdPreviewBox') || document.body)) {
-      MathJax.Hub.Queue(['Typeset', MathJax.Hub, 'wikEdPreviewBox']);
+  mathJax.Load = function(element) {
+    var config, script;
+    if (this.loaded) {
+      return true;
     }
+
+    // create configuration element
+    config = 'mathJax.Config();';
+    script = document.createElement( 'script' );
+    script.setAttribute( 'type', 'text/x-mathjax-config' );
+    if ( window.opera ) {
+      script.innerHTML = config;
+    } else {
+      script.text = config;
+    }
+    document.getElementsByTagName('head')[0].appendChild( script );
+
+    // create startup element
+    mediaWiki.loader.load('ext.math.mathjax');
+
+    this.loaded = true;
+
+    return false;
+  };
+
+  mathJax.Init = function() {
+    this.Load( document.getElementById('bodyContent') || document.body );
+
+    // compatibility with wikEd
+    if ( typeof(wikEd) == 'undefined' ) {
+      wikEd = {};
+    }
+    if ( typeof(wikEd.config) == 'undefined' ) {
+      wikEd.config = {};
+    }
+    if ( typeof(wikEd.config.previewHook) == 'undefined' ) {
+      wikEd.config.previewHook = [];
+    }
+    wikEd.config.previewHook.push( function(){
+      if (window.mathJax.Load(document.getElementById('wikEdPreviewBox') || document.body)) {
+        MathJax.Hub.Queue(['Typeset', MathJax.Hub, 'wikEdPreviewBox']);
+      }
+    } );
+
+    // compatibility with ajaxPreview
+    this.oldAjaxPreviewExec = window.ajaxPreviewExec;
+    window.ajaxPreviewExec = function(previewArea) {
+      if ( typeof(mathJax.oldAjaxPreviewExec) !== 'undefined' ) {
+        mathJax.oldAjaxPreviewExec(previewArea);
+      }
+      if ( mathJax.Load(previewArea) ) {
+        MathJax.Hub.Queue( ['Typeset', MathJax.Hub, previewArea] );
+      }
+    };
+  };
+
+  $( document ).ready( function() {
+    mathJax.Init();
   } );
 
-  // compatibility with ajaxPreview
-  this.oldAjaxPreviewExec = window.ajaxPreviewExec;
-  window.ajaxPreviewExec = function(previewArea) {
-    if ( typeof(mathJax.oldAjaxPreviewExec) !== 'undefined' ) {
-      mathJax.oldAjaxPreviewExec(previewArea);
-    }
-    if ( mathJax.Load(previewArea) ) {
-      MathJax.Hub.Queue( ['Typeset', MathJax.Hub, previewArea] );
-    }
-  };
-};
-
-jQuery( document ).ready( function() {
-	mathJax.Init();
-} );
+}( mediaWiki, jQuery ) );