function ToggleSnapMinimize(SnapObject, MenuItemIndex)
    {
      SnapObject.toggleMinimize();
      ToggleItemCheckedState(MenuItemIndex);
    }

    function ToggleItemCheckedState(MenuItemIndex)
    {
      var item = Menu1.get_items().getItem(0).get_items().getItem(MenuItemIndex);
      if (item.getProperty('Look-LeftIconUrl') == 'check.gif')
      {
        item.setProperty('Look-LeftIconUrl','clear.gif');
      }
      else
      {
        item.setProperty('Look-LeftIconUrl','check.gif');
      }
      item.get_parentMenu().render();
    }