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JS & DOM Reference

Overview

JavaScript Objects

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Browser Objects

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HTML DOM Objects

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DOM Anchor DOM Area DOM Base DOM Body DOM Button DOM Form DOM Frame/IFrame DOM Frameset DOM Image DOM Input Button DOM Input Checkbox DOM Input File DOM Input Hidden DOM Input Password DOM Input Radio DOM Input Reset DOM Input Submit DOM Input Text DOM Link DOM Meta DOM Object DOM Option DOM Select DOM Style DOM Table DOM td / th DOM tr DOM Textarea

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

Check and un-check the "Red" radio button:

<html>
<head>
<script>
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