Also inform if no rooms were found

Libraries/strophe.muc.js

@@ -524,11 +524,11 @@
             return this._connection.send(presence.tree());
         },
 
-        listRooms: function(server, handle_cb) {
+        listRooms: function(server, callback, errback) {
             /* List all chat room available on a server.
              * Parameters:
              * (String) server - name of chat server.
-             * (String) handle_cb - Function to call for room list return.
+             * (String) callback - Function to call for room list return.
             */
             var iq;
             iq = $iq({
@@ -538,7 +538,7 @@
             }).c("query", {
                 xmlns: Strophe.NS.DISCO_ITEMS
             });
-            return this._connection.sendIQ(iq, handle_cb);
+            return this._connection.sendIQ(iq, callback, errback);
             },
             test_append_nick: function(room, nick) {
             return room + (nick !== null ? "/" + (Strophe.escapeNode(nick)) : "");

converse.css

@@ -431,7 +431,6 @@ form.search-xmpp-contact input {
 #available-chatrooms dt,
 #converse-roster dt {
     font-weight: normal;
-    display: none;
     font-size: 13px;
     color: #666;
     border: none;
@@ -439,6 +438,10 @@ form.search-xmpp-contact input {
     text-shadow: 0 1px 0 rgba(250, 250, 250, 1);
 }
 
+#converse-roster dt {
+    display: none;
+}
+
 dd.available-chatroom,
 #converse-roster dd {
     font-weight: bold;

converse.js

@@ -717,26 +717,31 @@
         },
 
         updateRoomsList: function (domain) {
-            converse.connection.muc.listRooms(this.muc_domain, $.proxy(function (iq) {
-                var name, jid, i,
-                    rooms = $(iq).find('query').find('item'),
-                    rooms_length = rooms.length,
-                    $available_chatrooms = this.$el.find('#available-chatrooms'),
-                    fragment = document.createDocumentFragment();
-                $available_chatrooms.html('<dt>Rooms on '+this.muc_domain+'</dt>');
-                if (rooms.length) {
-                    $available_chatrooms.find('dt').show();
-                } else {
-                    $available_chatrooms.find('dt').hide();
-                }
-                for (i=0; i<rooms_length; i++) {
-                    name = Strophe.unescapeNode($(rooms[i]).attr('name')||$(rooms[i]).attr('jid'));
-                    jid = $(rooms[i]).attr('jid');
-                    fragment.appendChild($(this.room_template({'name':name, 'jid':jid}))[0]);
-                }
-                $available_chatrooms.append(fragment);
-                return true;
-            }, this));
+            converse.connection.muc.listRooms(
+                this.muc_domain, 
+                $.proxy(function (iq) { // Success
+                    var name, jid, i,
+                        rooms = $(iq).find('query').find('item'),
+                        rooms_length = rooms.length,
+                        $available_chatrooms = this.$el.find('#available-chatrooms'),
+                        fragment = document.createDocumentFragment();
+                    if (rooms.length) {
+                        $available_chatrooms.html('<dt>Rooms on '+this.muc_domain+'</dt>');
+                        for (i=0; i<rooms_length; i++) {
+                            name = Strophe.unescapeNode($(rooms[i]).attr('name')||$(rooms[i]).attr('jid'));
+                            jid = $(rooms[i]).attr('jid');
+                            fragment.appendChild($(this.room_template({'name':name, 'jid':jid}))[0]);
+                        }
+                        $available_chatrooms.append(fragment);
+                    } else {
+                        $available_chatrooms.html('<dt>No rooms on '+this.muc_domain+'</dt>');
+                    }
+                    return true;
+                }, this),
+                $.proxy(function (iq) { // Failure
+                    var $available_chatrooms = this.$el.find('#available-chatrooms');
+                    $available_chatrooms.html('<dt>No rooms on '+this.muc_domain+'</dt>');
+                }, this));
         },
 
         showRooms: function (ev) {