Some XUL Widgets
•menus: menubar, menupopup, menuitem, menuseparator
•toolbars: toolbar, toolbaritem, toolbox (holds toolbars and adds grippies for collapsing)
•titledbutton, progressmeter, tri-state checkbox
•tree: tree, treecaption, treecolgroup, treecol, treehead, treechildren, treeitem, treefoot, treerow, treecell
•tab view: tabcontrol, tabbox, tab, tabpanel, titledbutton
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