JS & DOM Reference

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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().

Note: The Radio object can also use the properties/methods of:

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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