This plugin is used to create a set of panels with their own tabs for selection. The actual visibility management is handled in JavaScript by setting the CSS styling attribute "display" to "hidden" or not hidden. Default styling of the tabs is rather rudimentary but can be improved a lot with the techniques found at www.alistapart.com. Usage:
<!--[pnformtabbedpanelset]-->
<!--[pnformtabbedpanel title="Tab A"]-->
... content of first tab ...
<!--[/pnformtabbedpanel]-->
<!--[pnformtabbedpanel title="Tab B"]-->
... content of second tab ...
<!--[/pnformtabbedpanel]-->
<!--[/pnformtabbedpanelset]-->
You can place any pnForms plugins inside the individual panels. The tabs require some special styling which is handled by the styles in system/pnForm/pnstyle/style.css. If you want to override this styling then either copy the styles to another stylesheet in the templates directory or change the cssClass attribute to something different than the default class name.