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Frameset cols Property
Frameset Object
Definition and Usage
The cols property sets or returns the value of the cols attribute in a frameset.
The cols attribute specifies the size of, and the number of frames in a frameset. Each frame’s width is specified in a comma-separated list.
Syntax
framesetObject.cols=values
The cols property can have one or more of the following 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 |
Browser Support
The cols property is supported in all major browsers.
Example
Create a frameset with two columns. Each column is set to 50% of the browser window:
<html>
<frameset id="main" cols="50%,50%">
<frame src="frame_cols.htm">
<frame src="frame_a.htm">
</frameset>
</html>
<frameset id="main" cols="50%,50%">
<frame src="frame_cols.htm">
<frame src="frame_a.htm">
</frameset>
</html>
The source code of "frame_cols.htm" is as follows:
Example
<html>
<head>
<script>
function changeCols()
{
parent.document.getElementById("main").cols="30%,70%"
}
function restoreCols()
{
parent.document.getElementById("main").cols="50%,50%"
}
</script>
</head>
<body>
<input type="button" onclick="changeCols()" value="Change column size">
<input type="button" onclick="restoreCols()" value="Restore column size">
</body>
</html>
<head>
<script>
function changeCols()
{
parent.document.getElementById("main").cols="30%,70%"
}
function restoreCols()
{
parent.document.getElementById("main").cols="50%,50%"
}
</script>
</head>
<body>
<input type="button" onclick="changeCols()" value="Change column size">
<input type="button" onclick="restoreCols()" value="Restore column size">
</body>
</html>
Try it yourself »
Frameset Object
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