mod quiz + questions MDL-22370 convert JavaScript to YUI3 and modules.

Note, quiz editing JS has not been done yet.

question/flags.js

@@ -0,0 +1,65 @@
+// This script, and the YUI libraries that it needs, are inluded by
+// the $PAGE->requires->js calls in question_get_html_head_contributions in lib/questionlib.php.
+
+M.core_question_flags = {
+    flagattributes: null,
+    actionurl: null,
+    listeners: [],
+
+    init: function(Y, actionurl, flagattributes) {
+        M.core_question_flags.flagattributes = flagattributes;
+        M.core_question_flags.actionurl = actionurl;
+
+        Y.all('div.questionflag').each(function(flagdiv, i) {
+            var checkbox = flagdiv.one('input.questionflagcheckbox');
+            if (!checkbox) {
+                return;
+            }
+
+            var input = Y.Node.create('<input type="hidden" />');
+            input.set('id', checkbox.get('id'));
+            input.set('name', checkbox.get('name'));
+            input.set('value', checkbox.get('checked') ? 1 : 0);
+
+            // Create an image input to replace the img tag.
+            var image = Y.Node.create('<input type="image" class="questionflagimage" />');
+            M.core_question_flags.update_flag(input, image);
+
+            checkbox.remove();
+            flagdiv.one('label').remove();
+            flagdiv.append(input);
+            flagdiv.append(image);
+        });
+
+        Y.delegate('click', function(e) {
+            var input = this.previous('input');
+            input.set('value', 1 - input.get('value'));
+            M.core_question_flags.update_flag(input, this);
+            var postdata = this.previous('input.questionflagpostdata').get('value') +
+                    input.get('value')
+
+            e.halt();
+            Y.io(M.core_question_flags.actionurl , {method: 'POST', 'data': postdata});
+            M.core_question_flags.fire_listeners(postdata);
+        }, document.body, 'input.questionflagimage');
+
+    },
+
+    update_flag: function(input, image) {
+        image.setAttrs(M.core_question_flags.flagattributes[input.get('value')]);
+    },
+
+    add_listener: function(listener) {
+        M.core_question_flags.listeners.push(listener);
+    },
+
+    fire_listeners: function(postdata) {
+        for (var i = 0; i < M.core_question_flags.listeners.length; i++) {
+            M.core_question_flags.listeners[i](
+                postdata.match(/\baid=(\d+)\b/)[1],
+                postdata.match(/\bqid=(\d+)\b/)[1],
+                postdata.match(/\bnewstate=(\d+)\b/)[1]
+            );
+        }
+    }
+};