Stack Panel

The StackPanel is a table-based widget that gives you an Outlook Bar type area. It gives you a list of headers, each of which has content of some sort, but only one is open at any one time. It is very similar to having a whole bunch of Disclosure panels except that you can only have one open at any point in time.

Reference:

http://code.google.com/googleapps/appsscript/class_stackpanel.html
http://examples.roughian.com/index.htm#Panels~StackPanel

Example Demo:

To try the demo, Click on the panelsn named 'One', 'Two', 'Three'.

Example Code:

function doGet() {

var app = UiApp.createApplication();

//Create stack panel

var stackPanel = app.createStackPanel().setSize('100%', '100%');

//add widgets to each stack panel, and name the stack panel

//Here I have used labels as widgets.

stackPanel.add(app.createLabel('Lorem ipsum dolor sit amet...'), 'One');

stackPanel.add(app.createLabel('Sed egestas, arcu nec accumsan...'), 'Two');

stackPanel.add(app.createLabel('Proin tristique, elit at blandit...'), 'Three');

//Add the panel to the application

app.add(stackPanel);

return app;

}