From ee7300f6e6c7ec6684fe2e8dc1c136c308b3df1f Mon Sep 17 00:00:00 2001
From: Jetha Chan <jetha@moodle.com>
Date: Thu, 2 Jul 2015 10:19:50 +0800
Subject: [PATCH] MDL-50685 core_form: disable hidden options, don't just hide

---
 lib/form/searchableselector.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/form/searchableselector.js b/lib/form/searchableselector.js
index 13632b28ebd..1f59e70cb6d 100644
--- a/lib/form/searchableselector.js
+++ b/lib/form/searchableselector.js
@@ -90,9 +90,11 @@ selector = {
         if (selector.goodbrowser) {
             if (visible) {
                 element.style.display = 'block';
+                element.disabled = false;
             } else {
                 element.style.display = 'none';
                 element.selected = false;
+                element.disabled = true;
             }
         } else {
             // This is a deeply evil hack to make the filtering work in IE.
@@ -103,7 +105,7 @@ selector = {
                 if (element.parentNode.tagName.toLowerCase() === 'span') {
                     element.parentNode.parentNode.replaceChild(element, element.parentNode); // New, old.
                 }
-                element.enabled = true;
+                element.disabled = false;
             } else {
                 if (element.parentNode.tagName.toLowerCase() !== 'span') {
                     var span = document.createElement('span');
@@ -111,7 +113,7 @@ selector = {
                     span.appendChild(element);
                     span.style.display = 'none';
                 }
-                element.enabled = false;
+                element.disabled = true;
                 element.selected = false;
             }
         }