protected static function setUpGrid( $graph, $config, $data )
	{
		$gridDepth	= self::getConfigValue( $config, "grid.depth", DEPTH_BACK );
		$graph->setGridDepth( $gridDepth );
		UI_Image_Graph_Components::setGrid( $graph->xgrid, self::getSubConfig( $config, 'x.grid.' ), $data );
		UI_Image_Graph_Components::setGrid( $graph->ygrid, self::getSubConfig( $config, 'y.grid.' ), $data );
	}