# HTML <frameset> cols Attribute

HTML <frameset> tag

## Example

A frameset with three columns:

<frameset cols="25%,*,25%">
<frame src="frame_a.htm">
<frame src="frame_b.htm">
<frame src="frame_c.htm">
</frameset>
Try it Yourself »

## Definition and Usage

The <frameset> tag is not supported in HTML5.

The cols attribute specifies the size of, and the number of columns in a <frameset>.

Each frame's width is specified in the cols attribute in a comma-separated list.

Note: The number of cols attribute values specified, defines the number of columns in the <frameset>.

## Browser Support

Attribute |  |  |  |  |
--- | --- | --- | --- | --- | ---
cols | Yes | Yes | Yes | Yes | Yes

## Syntax

<frameset cols="pixels|%|*">

## Attribute Values

Value | Description
--- | ---
pixels | The column size in pixels (like "100px" or just "100")
% | The column size in percent of the available space (like "50%")
* | The rest of the available space should be assigned this column

HTML <frameset> tag

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