orient- Type: one of the values below
- Used to specify whether the children of the element are oriented horizontally or vertically. The default value depends on the element. You can also use the
-moz-box-orient style property.
horizontal- Child elements of the element are placed next to each other in a row in the order that they appear in the XUL source.
vertical- Child elements of the element are placed under each other in a column in the order that they appear in the XUL source.