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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().
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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