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Radio checked Property
Radio Object
Definition and Usage
The checked property sets or returns the checked state of a radio button.
Syntax
Set the checked property:
radioObject.checked=true|false
Return the checked property:
radioObject.checked
Browser Support
The checked property is supported in all major browsers.
Example
Example
Check and un-check the "Red" radio button:
<html>
<head>
<script type="text/javascript">
function check()
{
document.getElementById("red").checked=true
}
function uncheck()
{
document.getElementById("red").checked=false
}
</script>
</head>
<body>
<form>
What color do you prefer?<br />
<input type="radio" name="colors" id="red" />Red<br />
<input type="radio" name="colors" id="blue" />Blue<br />
<input type="radio" name="colors" id="green" />Green
</form>
<button type="button" onclick="check()">Check "Red"</button>
<button type="button" onclick="uncheck()">Uncheck "Red"</button>
</body>
</html>
<head>
<script type="text/javascript">
function check()
{
document.getElementById("red").checked=true
}
function uncheck()
{
document.getElementById("red").checked=false
}
</script>
</head>
<body>
<form>
What color do you prefer?<br />
<input type="radio" name="colors" id="red" />Red<br />
<input type="radio" name="colors" id="blue" />Blue<br />
<input type="radio" name="colors" id="green" />Green
</form>
<button type="button" onclick="check()">Check "Red"</button>
<button type="button" onclick="uncheck()">Uncheck "Red"</button>
</body>
</html>
Try it yourself »
Radio Object
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Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2012 by Refsnes Data. All Rights Reserved.
Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2012 by Refsnes Data. All Rights Reserved.