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
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, Methods, and Events

The Radio object also supports the standard properties, methods, and events.

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