             }
             event.stopImmediatePropagation();
         }
-        else if (event.ctrlKey && event.shiftKey && event.keyCode == Keyboard.LEFT)
+        else if (event.ctrlKey && event.shiftKey && keyCode == Keyboard.LEFT)
         {
             // Left Arrow closes an open item. Otherwise selects the parent item.
             if (isItemOpen(item))

                }
            }
        }
        else if (event.keyCode == Keyboard.NUMPAD_SUBTRACT)
        {
            if (isItemOpen(item))
            {

                selectColumnGroupHeader(newSelectedHeaderInfo);
             }
          }
          else if (keyCode == Keyboard.SPACE)
          {
              if (sortableColumns && 
                  selectedHeaderInfo.column.colNum != -1 && !isNaN(selectedHeaderInfo.column.colNum)
