# colgroup

Defines a table column group.

## Platform Support

IE | Netscape | Mozilla | Opera | Safari
--- | --- | --- | --- | ---
4.0+ | 6.0+ | 1.0+ | 7.0+ | 1.0+

## Example

This example shows a table with the 10px-wide first column center-aligned and the second column left-aligned:

    <table>
    	<colgroup>
    		<col align="center" width="10px" />
    		<col align="left" />
    	</colgroup>
    	<tr>
    		<td>1.</td> <td>Labrador retriever</td>
    	</tr>
    	<tr>
    		<td>2.</td> <td>Golden retriever</td>
    	</tr>
    	<tr>
    		<td>3.</td> <td>Pug</td>
    	</tr>
    </table>

## Remarks

Specify the attributes of any individual columns in a <col /> tag that is nested inside of a set of <colgroup> </colgroup> tags.

## Attribute Detail

Attribute | IE | Netscape | Mozilla | Opera | Safari
--- | --- | --- | --- | --- | ---
align Defines the alignment of the element. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
bgcolor [color | "transparent"]. Example values: Red, #FF0000 (#RRGGBB color code for "red"), etc. Specifies the background color for the document or element. Specify either a color name or RGB color. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
char [character]. Example values: ".", "*", etc. Specifies which character to use to set the alignment for the element. | 4.0+ |  | 1.0+ | 7.0+ | 1.0+
charoff [number-of-characters]. Example values: 2, -2, etc. Number of characters to offset the other column characters from the character specified by char. | 4.0+ |  | 1.0+ | 7.0+ | 1.0+
class [class-name]. Example values: header-class, list-element, etc. CSS class assigned to the element. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
dir Direction of the element text. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
id [element-id] Unique identifier for the element. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
lang [language-code]. Example values: "en" (English), "fr" (French), "es" (Spanish), etc. Language code for the content of the element. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
span [number-of-columns] Number of columns that this column should span. | 4.0+ | 6.0+ | 1.0+ | 7.0+ | 1.0+
style [style-name] Inline style for the element. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
title [text-description] Short text description for the element. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
valign Vertical alignment of the element. | 2.0+ | 1.1+ | 1.0+ | 4.0+ | 1.0+
width [number-of-pixels | percentage]. Example values: 200px, 15%, etc. Width of the element (pixels or percentage). | 2.0+ | 1.1+ | 1.0+ | 4.0+ | 1.0+

## Event Detail

Event | IE | Netscape | Mozilla | Opera | Safari
--- | --- | --- | --- | --- | ---
onclick Fires when the element is clicked. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
ondblclick Fires when the element is double-clicked. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
onkeydown Fires when a user presses down on a key while the element has focus. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
onkeypress Fires when a user presses a key or holds down the key while the element has focus. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
onkeyup Fires when a user releases a key while the element has focus. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
onmousedown Fires when a user clicks down on the mouse button while the element has focus. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
onmousemove Fires when the mouse moves while the pointer over the element. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
onmouseout Fires when the mouse pointer moves off of the element. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
onmouseover Fires when the mouse pointer moves over the element. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
onmouseup Fires when the user releases the mouse button while the element has focus. | 2.0+ | 1.0+ | 1.0+ | 4.0+ | 1.0+
onreadystatechange Fires when the ready state of the element changes. | 4.0+ | no | no | no | no

## Availability

W3C HTML 4.01

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