--- a/nickname.js
+++ b/nickname.js
@@ -8,7 +8,7 @@ function initNickname(connection) {
         .c('pubsub', {xmlns: 'http://jabber.org/protocol/pubsub'})
             .c('items', {node: 'http://jabber.org/protocol/nick'});
     connection.sendIQ(iq, onNickname, onNicknameRetrievalError.bind(null, 'PubSub query failed.'));
-    spinner_img.hidden = false;
+    displaySpinner(spinner_img);
 
     function onNickname(result_iq)
     {
@@ -18,13 +18,13 @@ function initNickname(connection) {
         const id = item.getAttributeNS(null, 'id');
         const nick = parseXPath(item, './nickname:nick');
         nick_input.value = nick.textContent;
-        spinner_img.hidden = true;
+        hideSpinner(spinner_img);
     }
 
     function onNicknameRetrievalError(string)
     {
         console.log('Failed to retrieve nickname: ' + string);
-        spinner_img.hidden = true;
+        hideSpinner(spinner_img);
     }
 
     nick_input.addEventListener('blur', function (evt) {
@@ -35,18 +35,18 @@ function initNickname(connection) {
                         .c('nick', {xmlns: 'http://jabber.org/protocol/nick'})
                             .t(nick_input.value);
         connection.sendIQ(iq, onNicknameChanged, onNicknameChangeError);
-        spinner_img.hidden = false;
+        displaySpinner(spinner_img);
     });
 
-    function onNicknameChanged(iq)
+    function onNicknameChanged(result_iq)
     {
-        console.log("onNicknameChanged", iq);
-        spinner_img.hidden = true;
+        console.log("Nickname successfully changed.");
+        spinnerOk(spinner_img);
     }
 
     function onNicknameChangeError(iq)
     {
         console.log("onNicknameChangeError", iq);
-        spinner_img.hidden = true;
+        spinnerError(spinner_img);
     }
 }