     //--------------------------------------------------------------------------  
     
     // The down,roll pairs of variables below define column indices.  Only one
-    // member of each pair will be not equal to -1 at a time.
+    // member of each pair will be not equal to -1 at a time. 
     
     private var rollColumnIndex:int = -1;      // column mouse has rolled into
     private var rollSeparatorIndex:int = -1;   // separator mouse has rolled into

                {
                    gridEventType = GridEvent.GRID_MOUSE_DOWN;
                    downSeparatorIndex = -1;
                    downColumnIndex = eventSeparatorIndex;
                }
                break;
        }

    {
        const column:GridColumn = getColumnAt(columnIndex);
        const item:Object = null;
        const itemRenderer:IGridItemRenderer = getHeaderRendererAt(columnIndex);
        const bubbles:Boolean = mouseEvent.bubbles;
        const cancelable:Boolean = mouseEvent.cancelable;
        const relatedObject:InteractiveObject = mouseEvent.relatedObject;
