A container used to display a set of tabbed pages of elements. A row of tabs is displayed at the top of tabbox which may be used to switch between each page. The tabbox should contain two children, the first a tabs element which contains the tabs and the second a tabpanels element which contains the contents of the pages.
More information is available in the XUL tutorial.
<tabbox id="myTabList" selectedIndex="2">
<tabs>
<tab label="A First tab"/>
<tab label="Second tab"/>
<tab label="Another tab"/>
<tab label="Last tab"/>
</tabs>
<tabpanels>
<tabpanel><!-- tabpanel First elements go here --></tabpanel>
<tabpanel><!-- tabpanel Second elements go here --></tabpanel>
<tabpanel><button label="Click me"/></tabpanel>
<tabpanel><!-- tabpanel Fourth elements go here --></tabpanel>
</tabpanels>
</tabbox>

eventnodetabbox. Thus, if this attribute is not used, the tabbox or an element inside it must have the focus for the keyboard navigation to apply.parenttabbox.windowdocumenthandleCtrlTabtrue or omitted, the tabbox will switch to the next tab when the Control and Tab keys are pressed. If the Shift key is also held down, the previous tab will be displayed. If this attribute is set to false, these keys do not navigate between tabs.
accessibleTypehandleCtrlPageUpDownhandleCtrlPageUpDown attribute.handleCtrlTabhandleCtrlTab attibute.selectedIndex-1 to this property, all items will be deselected. Returns -1 if no items are selectedselectedPanel<tabbox> element. Assigning a value to this property will modify the selected panel. A select event will be sent when the selected panel is changed.selectedTabtab elements in the tabs element. Assign a value to this property to modify the currently selected tab.tabs, tab, tabpanels, tabpanel.