http://www.xulplanet.com/tutorials/xultu/titledbox.html http://www.xulplanet.com/reference/elemref/ref_groupbox.html A box that draws a frame around it, intended to group a set of elements together. If a caption element is placed inside the groupbox, it will be used as a caption which appears along the top of the groupbox. nsIAccessibleProvider Returns the accessibility object for the groupbox.