HTML DOM Radio Object

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# HTML DOM Radio Object

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## Radio Object

The Radio object represents a radio button in an HTML form.

Radio buttons allow the user to select only ONE of a predefined set of options. You define groups with the name property (radio buttons with the same name belong to the same group).

For each <input type="radio"> tag in an HTML form, a Radio object is created.

You can access a radio object by searching through the elements[] array of the form, or by using document.getElementById().

## Radio Object Properties

W3C: W3C Standard.

Property | Description | W3C
--- | --- | ---
checked | Sets or returns the checked state of a radio button | Yes
defaultChecked | Returns the default value of the checked attribute | Yes
disabled | Sets or returns whether the radio button is disabled, or not | Yes
form | Returns a reference to the form that contains the radio button | Yes
name | Sets or returns the value of the name attribute of a radio button | Yes
type | Returns which type of form element the radio button is | Yes
value | Sets or returns the value of the value attribute of the radio button | Yes

## Standard Properties and Events

The Radio object also supports the standard properties and events.

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