overlay -- Root element in a separate file that contains reusable XUL content

Additional Attributes

xmlns, title


Like page, window, dialog, and wizard, overlay is a XUL document's root element. Overlay documents contain content blocks that are overlaid dynamically at runtime into XUL content whose IDs match theirs. For example, a menupopup with the ID "file" and a menuitem child in an overlay adds that new menuitem into any menupopup with the ID "file" that it finds in the base XUL.

See Also

page, window