HTML colgroup tag

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# 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>

Try it yourself!

## 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.

## Browser Support

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

## Differences Between HTML and XHTML

NONE

## 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.

## 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

For a full description, go to Standard Attributes.

## Event Attributes

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

For a full description, go to Event Attributes.

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