Code

function onNodeSelected(sender, args)
{
	args.getNode().setText(args.getNode().getText() + "\n\rselected");
}

function onNodeDeselected(sender, args)
{
	args.getNode().setText(args.getNode().getText() + "\n\rdeselected");
} 

Code

<ndiag:DiagramView runat="server"
	ID="diagramView"
	Width="750px" Height="480px"
	ClientSideMode="JavaApplet"
	AppletStarted="onAppletStarted"
	NodeSelectedScript="onNodeSelected"
	NodeDeselectedScript="onNodeDeselected"
	NodeClickedScript="onNodeClicked"
	NodeCreatedScript="onNodeCreated"
    >
	<Diagram SelectAfterCreate="False" TableBrush="s:#FFFFFFFF" CellFrameStyle="None"></Diagram>
</ndiag:DiagramView>

...

<script type="text/javascript">
	var logTable;

	function onAppletStarted()
	{
		var diagram = <%= diagramView.AppletElement %>.getDiagram();
		logTable = diagram.getFactory().createTableNode(0, 0, 50, 200);
		logTable.setCaption("Log");
		logTable.redimTable(1, 0);
	}

	function log(message)
	{
		logTable.addRow();
		logTable.getCell(0, logTable.getRowCount() - 1).setText(message);
	}

	function onNodeSelected(sender, args)
	{
		log(args.getNode().getText() + " selected");
	}

	function onNodeDeselected(sender, args)
	{
		log(args.getNode().getText() + " deselected");
	}

	function onNodeClicked(sender, args)
	{
		log(args.getNode().getText() + " clicked");
	}

	function onNodeCreated(sender, args)
	{
		args.getNode().setText(args.getNode().getZIndex());
	}

</script>