As with paragraphs, justified margins does not work in Netscape Navigator prior to version 4.0. Inserts a thin line. Sets the width of the line, either in pixels or in percent. This is a Netscape extension, added in Netscape 3.0. The text within this tag will show up in columns.
All columns have the same width.
Inserts an empty space. TYPE is the type of space and SIZE is the height or width, not used with blocks.