INPUT TYPE=radio XHTML Element

Article
08/28/2006

The INPUT TYPE=radio element creates a radio button control. This is an inline element and does not require a closing tag.

Use a radio button control to limit a user's selection to a single value within a set of values. To do this, you must group each button in a set of radio buttons by assigning each button the same name. When a user submits a form, a selected radio button generates a name or value pair in the form data only if the button has a value.

Note If a radio button is in a group and the button has no value, the button name is submitted without a value.

Using this Element

There are some common properties and collections that apply to all the elements of the document object model, see Common Properties for All DOM Elements in Internet Explorer Mobile.

This element can be used within a web page with attributes.

This element can be used within scripts where it will have properties, events and methods.

Attributes

Attribute	Value	PPC	SP	Description
ACCESSKEY	0...9, #, *	Yes	Yes	Gives access or focus to an active HTML element by using a keypad number. Note For Pocket PCs, supported only for devices running Windows Mobile 2003 software or later
CHECKED		Yes	Yes	Specifies selection of the radio control.
CLASS		Yes	Yes	Associates the element with a CSS style. Note Supported only for devices running Windows Mobile 2003 software or later.
DISABLED		Yes	Yes	Disables the element so that it appears dimmed and does not respond to user input. Note Supported only for devices running Windows Mobile 2003 software or later.
ID		Yes	Yes	Uniquely identifies the element within a document. Note Supported only for devices running Windows Mobile 2003 software or later.
NAME	String	Yes	Yes	Specifies the radio control name.
ONBLUR		Yes	Yes	Event that occurs when the radio control loses focus by the pointing device or by tabbing navigation. Note Supported only for devices running PocketPC 2002 and Smartphone 2002 software or later.
ONCLICK		Yes	Yes	Event that occurs when the user chooses the radio control. Note Supported only for devices running PocketPC 2002 and Smartphone 2002 software or later.
ONFOCUS		Yes	Yes	Event that occurs when the radio control receives focus by a pointing device or by tabbing navigation. Note Supported only for devices running PocketPC 2002 and Smartphone 2002 software or later.
STYLE		Yes	Yes	Provides the definition of the CSS styles used for this element. Note Supported only for devices running Windows Mobile 2003 software or later.
TABINDEX		Yes	Yes	Sets the order in which elements are tabbed to. Note Supported only for devices running Windows Mobile 2003 software or later.
VALUE	String	Yes	Yes	Specifies the radio control value.

Scripting Properties

Property	Type	Access	Comments
accessKey	string	Read/Write
checked	boolean	Read/Write	Sets or retrieves the state of the input type=radio control. The only possible values are true and false.
disabled	boolean	Read/Write
defaultChecked	boolean	Read/Write	Specifies whether or not the input type=radio is checked by default.
form	object	Read Only
name	string	Read Only
type	string	Read Only	Always returns: radio
value	string	Read/Write	Sets or retrieves that value of the input type=radio control. The default value is "on".

Scripting Events

Event	Supported	Comment
onclick	Yes	This event fires when the user taps on the radio button element. Note the event only fires if the user does a pen down while on the radio button and a pen up over the same radio. The author can specify special handler for this event.
onblur	Yes
onfocus	Yes

Scripting Methods

Method Support Comments

click

Yes

Method	Support	Comments
click	Yes	Syntax: `radio.click()` Simulates clicking on the radio button causing the onclick event to fire.
focus	Yes	Syntax: `radio.focus()` Sets focus to the radio button control.

Syntax:

radio.click()

Simulates clicking on the radio button causing the onclick event to fire.

focus

Yes

Syntax:

radio.focus()

Sets focus to the radio button control.

Requirements

Pocket PC: Windows Mobile 5.0 and later
Smartphone: Windows Mobile 5.0 and later
OS Versions: Windows CE 5.01 and later