HTML colgroup tag

Example

Two colgroup elements that specify different alignment and style for the three columns in the table (notice that the first colgroup element spans two columns):

<table width="100%" border="1"> <colgroup span="2" align="left"></colgroup> <colgroup align="right" style="color:#0000FF;"></colgroup> <tr> <th>ISBN</th> <th>Title</th> <th>Price</th> </tr> <tr> <td>3476896</td> <td>My first HTML</td> <td>$53</td> </tr> </table>

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Definition and Usage

The <colgroup> tag is used to group columns in a table for formatting.
The <colgroup> tag is useful for applying styles to entire columns, instead of repeating the styles for each cell, for each row.
The <colgroup> tag can only be used inside a table element.

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Browser Support

The <colgroup> tag is only supported by Internet Explorer and Opera.

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Differences Between HTML and XHTML

NONE

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Tips and Notes

Tips: Add the class attribute to the <colgroup> tag, and let CSS take care of alignment, widths, colors, etc.!
Also have a look at the <col> tag.

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Optional Attributes

DTD indicates in which DTD the attribute is allowed. S=Strict, T=Transitional, and F=Frameset.

Attribute	Value	Description	DTD
align	right left center justify char	Defines the horizontal alignment of the contents in the column group	STF
char	character	Defines a character to use to align text on (use with align="char")	STF
charoff	character-offset	Defines an alignment offset to the first character to align on, as set with char	STF
span	number	Defines the number of columns the <colgroup> should span	STF
valign	top middle bottom baseline	Defines the vertical alignment of the contents in the column group	STF
width	% pixels relative_length	Defines the width of the column group.Note: The width attribute can be overridden by settings in <col>!	STF

Standard Attributes

id, class, title, style, dir, lang, xml:lang

Event Attributes

onclick, ondblclick, onmousedown, onmouseup, onmouseover, onmousemove, onmouseout, onkeypress, onkeydown, onkeyup