double clicks on the adjustment control point
				// of the edge. The ElbowConnector edge style switches to TopToBottom
				// if the horizontal style is true.
				var style = graph.getStylesheet().getDefaultEdgeStyle();
				style[mxConstants.STYLE_ROUNDED] = true;
				style[mxConstants.STYLE_EDGE] = mxEdgeStyle.ElbowConnector;
				graph.alternateEdgeStyle = 'elbow=vertical';

				// Enables rubberband selection
				new mxRubberband(graph);
				
				// Gets the default parent for inserting new cells. This
	