From ff3b7c85db1596ff0ca279902154505ec526d2c1 Mon Sep 17 00:00:00 2001
From: Tim Hunt <T.J.Hunt@open.ac.uk>
Date: Thu, 15 Mar 2012 14:24:46 +0000
Subject: [PATCH] MDL-32064 quiz navigation: JS form submit must fire submit
 event handlers.

---
 mod/quiz/module.js | 29 +++++++++++++++++++++++++----
 1 file changed, 25 insertions(+), 4 deletions(-)

diff --git a/mod/quiz/module.js b/mod/quiz/module.js
index 63c44d65d8d..3ac6032be1d 100644
--- a/mod/quiz/module.js
+++ b/mod/quiz/module.js
@@ -143,6 +143,29 @@ M.mod_quiz.nav.init = function(Y) {
 
     var form = Y.one('#responseform');
     if (form) {
+        function find_enabled_submit() {
+            // This is rather inelegant, but the CSS3 selector
+            //     return form.one('input[type=submit]:enabled');
+            // does not work in IE7, 8 or 9 for me.
+            var enabledsubmit = null;
+            form.all('input[type=submit]').each(function(submit) {
+                if (!enabledsubmit && !submit.get('disabled')) {
+                    enabledsubmit = submit;
+                }
+            });
+            return enabledsubmit;
+        }
+
+        function nav_to_page(pageno) {
+            Y.one('#followingpage').set('value', pageno);
+
+            // Automatically submit the form. We do it this strange way because just
+            // calling form.submit() does not run the form's submit event handlers.
+            var submit = find_enabled_submit();
+            submit.set('name', '');
+            submit.getDOMNode().click();
+        };
+
         Y.delegate('click', function(e) {
             if (this.hasClass('thispage')) {
                 return;
@@ -157,22 +180,20 @@ M.mod_quiz.nav.init = function(Y) {
             } else {
                 pageno = 0;
             }
-            Y.one('#followingpage').set('value', pageno);
 
             var questionidmatch = this.get('href').match(/#q(\d+)/);
             if (questionidmatch) {
                 form.set('action', form.get('action') + '#q' + questionidmatch[1]);
             }
 
-            form.submit();
+            nav_to_page(pageno);
         }, document.body, '.qnbutton');
     }
 
     if (Y.one('a.endtestlink')) {
         Y.on('click', function(e) {
             e.preventDefault();
-            Y.one('#followingpage').set('value', -1);
-            Y.one('#responseform').submit();
+            nav_to_page(-1);
         }, 'a.endtestlink');
     }