HTML <colgroup> width Attribute
A <colgroup> element that specifies that the first column should have a predefined width of 200 pixels:
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The width attribute is supported in all major browsers. However, none of the browsers support the relative_length value.
Definition and Usage
The <colgroup> width attribute is not supported in HTML5.
The width attribute specifies the width of a column group.
Normally, a column group takes up the space it needs to display the content. The width attribute is used to set a predefined width of a column group.
Note: This attribute will be overwritten by any width set by <col> elements.
|pixels||Sets the width in pixels (example: width="50")|
|%||Sets the width in percent of the surrounding element (example: width="50%")|
|relative_length||Shares the available pixels into parts. (e.g. A table is 100 px, the first column group is
20 px, the second is 50%, the available pixels will then be 30px). One part is set like this: "1*".
Example: If 30 px of space are available, you can have one "1*" and one "2*", which will be interpreted as 10 and 20 px (think of 1* as one part, and 2* as two parts).
HTML <colgroup> tag
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