How to show and hide CalendarExtender and CollapsiblePanel

Here is the javascript for expanding or collapsing a collapsible panel:

        // Used for collapsible panels to toggle collapse or open
        function CollapsiblePanelExtender_Toggle(behaviorId)
        {
          var behavior = $find(behaviorId);
          if (behavior!=null) {
              if (behavior.get_Collapsed()==false) {
                try {behavior._doClose();} catch(e) { }
              }else if (behavior.get_Collapsed()==true) {
                try {behavior._doOpen();} catch(e) { }
              }
          }
        }
        // Used for calendar extenders to toggle show or hide
        function CalendarExtender_Toggle(behaviorId) {
              var behavior = $find(behaviorId);
              if (behavior!=null) {
                  if (behavior._isOpen==true) {
                    try {behavior.hide();} catch(e) { }
                  }else if (behavior._isOpen==false) {
                    try {behavior.show();} catch(e) { }
                  }
              }
        }    

The Calendar show and hide behavior is above. Note: it may be helpful to use an empty label/image for the calendarExtender popupcontrolId to manage show/hide behavior.