diff --git a/source/Ox.UI/js/Menu/Ox.MainMenu.js b/source/Ox.UI/js/Menu/Ox.MainMenu.js
index dd99a13f..6fce7bb7 100644
--- a/source/Ox.UI/js/Menu/Ox.MainMenu.js
+++ b/source/Ox.UI/js/Menu/Ox.MainMenu.js
@@ -140,8 +140,15 @@ Ox.MainMenu = function(options, self) {
     checkItem <f> checkItem
     @*/
     that.checkItem = function(id) {
-        var item = that.getItem(id);
-        item && item.options({checked: true});
+        var ids = id.split('_'),
+            item = that.getItem(id);
+        if (item) {
+            if (item.options('group')) {
+                item.options('menu').checkItem(ids[ids.length - 1]);
+            } else {
+                item.options({checked: true});
+            }
+        }
         return that;
     };