Two <colgroup> elements. The first spans two columns and sets the background-color to red, the second sets the background-color to blue:
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The <colgroup> tag is supported in all major browsers.
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.
Tip: Add the style attribute to the <colgroup> tag, and let CSS take care of backgrounds, width and borders.
Also have a look at the <col> tag.
NONE
DTD indicates in which HTML 4.01/XHTML 1.0 DTD the attribute is allowed. S=Strict, T=Transitional, and F=Frameset.
| Attribute | Value | Description | DTD |
|---|---|---|---|
| align | left right center justify char |
Aligns the content in a column group | STF |
| char | character | Aligns the content in a column group to a character | STF |
| charoff | number | Sets the number of characters the content will be aligned from the character specified by the char attribute | STF |
| span | number | Specifies the number of columns a column group should span | STF |
| valign | top middle bottom baseline |
Vertical aligns the content in a column group | STF |
| width | pixels % relative_length |
Specifies the width of a column group | STF |
The <colgroup> tag supports the following standard attributes:
| Attribute | Value | Description | DTD |
|---|---|---|---|
| class | classname | Specifies a classname for an element | STF |
| dir | rtl ltr |
Specifies the text direction for the content in an element | STF |
| id | id | Specifies a unique id for an element | STF |
| lang | language_code | Specifies a language code for the content in an element | STF |
| style | style_definition | Specifies an inline style for an element | STF |
| title | text | Specifies extra information about an element | STF |
| xml:lang | language_code | Specifies a language code for the content in an element, in XHTML documents | STF |
More information about Standard Attributes.
The <colgroup> tag supports the following event attributes:
| Attribute | Value | Description | DTD |
|---|---|---|---|
| onclick | script | Script to be run on a mouse click | STF |
| ondblclick | script | Script to be run on a mouse double-click | STF |
| onmousedown | script | Script to be run when mouse button is pressed | STF |
| onmousemove | script | Script to be run when mouse pointer moves | STF |
| onmouseout | script | Script to be run when mouse pointer moves out of an element | STF |
| onmouseover | script | Script to be run when mouse pointer moves over an element | STF |
| onmouseup | script | Script to be run when mouse button is released | STF |
| onkeydown | script | Script to be run when a key is pressed | STF |
| onkeypress | script | Script to be run when a key is pressed and released | STF |
| onkeyup | script | Script to be run when a key is released | STF |
More information about Event Attributes.
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