add event listener fix

stable.user.js

@@ -46,7 +46,7 @@
 // : Script header {{{
 // ==UserScript==
 // @name         Moodle/Elearning/KMOOC test help
-// @version      2.1.3.14
+// @version      2.1.3.15
 // @description  Online Moodle/Elearning/KMOOC test help
 // @author       MrFry
 // @match        https://elearning.uni-obuda.hu/*
@@ -1467,21 +1467,6 @@
     if (document.readyState === 'loading') {
       document.addEventListener('DOMContentLoaded', Init)
     } else {
-      try {
-        addEventListener = (function () {
-          if (document.addEventListener) {
-            return function (element, event, handler) {
-              element.addEventListener(event, handler, false)
-            }
-          } else {
-            return function (element, event, handler) {
-              element.attachEvent('on' + event, handler)
-            }
-          }
-        })()
-      } catch (e) {
-        Exception(e, 'script error at addEventListener:')
-      }
       Init()
     }
   }
@@ -1685,6 +1670,21 @@
       return
     }
 
+    try {
+      addEventListener = (function () {
+        if (document.addEventListener) {
+          return function (element, event, handler) {
+            element.addEventListener(event, handler, false)
+          }
+        } else {
+          return function (element, event, handler) {
+            element.attachEvent('on' + event, handler)
+          }
+        }
+      })()
+    } catch (e) {
+      Exception(e, 'script error at addEventListener:')
+    }
     VersionActions()
     if (!url.includes('.pdf')) {
       SetupMenu()