HTML DOM Radio Object

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