Web Design in a Nutshell, 3rd Edition

Name

colgroup

Synopsis

<colgroup>...</colgroup>

Creates a column group: a structural division within a table. A table may include more than one column group. The number of columns in a group is specified either by the value of the span attribute or by a tally of columns (col) within the group.

Column groups may be useful in speeding table display (for example, the columns can be displayed incrementally without waiting for the entire contents of the table) and provide a system for display on nonvisual display agents such as speech- and Braille-based browsers. The colgroup element must appear before any row (tr) or rowgroup (thead, tbody, tfoot) element within the table element.

Attributes

Core(id, class, style, title), Internationalization, Events, Alignment attributes: align, char, charoff, valign (see tbody entry for descriptions)

span=" number "

Specifies the number of columns in a column group. If span is not specified, the default is 1.

width=" pixels, percentage, n *"

Specifies a default width for each column in the current column group. Width can be measured in pixels, percentages, or defined as a relative size (*). 0* sets the column width at the minimum necessary to hold the column’s contents.