After applying the AJAX Tabset Wizard according to the instructions described here, the tabset control in browser should look as it follows:
As you can see in the image above, there are a few elements that compose a tabset built with MX AJAX Toolbox:
The top bar includes the defined tabs - each one shows the tab title, which when clicked displays the corresponding content below.
The content varies according to the clicked/active tab.
The width and the height of the content area are the ones set when configuring the AJAX Tabset Wizard.
Check out the MX AJAX Toolbox demo site and click the MX AJAX Toolbox item in the menu on the left. Try out the AJAX tabset that you will see there!