     //----------------------------------
 
     /**
-     *  @copy spark.core.IViewport#horizontalScrollPositionDelta
+     *  @copy spark.core.IViewport#horizontalScrollPositionDelta()
      *  
      *  @langversion 3.0
      *  @playerversion Flash 10

    }
    
    /**
     *  @copy mx.core.IVisualElementContainer#getElementAt
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10

    {
        if (_mouseEnabledWhereTransparent)
            $invalidateDisplayList();
    _hasMouseListeners = value;
    }
    
    /**
