Input Type=Radio
 
End Tag: Omitted
Support Key: 2 | 3 | 3.2 | 4 | IE1 | M2A1 | N1 | O2.1		 What is it?
Attributes
Tag Example 		Parent/Content Model
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What is it?
RADIO is a TYPE attribute value to the INPUT element for FORMs. A radio field represents a boolean choice. A set of radio fields with the same name represents a one-of-many choice. At any time only one button of a Radio button group will be ON.

Common Attributes
%Core%
2 | 3 | 3.2 | 4 | IE4B1 | M | N | O
%Events%
2 | 3 | 3.2 | 4 | IE3 | M | N2 | O3
%Language%
2 | 3 | 3.2 | 4 | IE4 | M | N | O
%Data%
2 | 3 | 3.2 | 4 | IE4 | M | N | O

Specific Attributes
Accesskey
2 | 3 | 3.2 | 4 | IE4B1 | M | N | O
Required? No
Description:
This is a method of giving access/focus to an active HTML element using a keyboard character. This is a common GUI paradigm also known as a "keyboard shortcut" or "keyboard accelerator" A single character is used as the value of this attribute. In addition, a platform-dependent key is usually used in combination with the ACCESSKEY character to access the functionality of the active field.
Values:
A single, case-insensitive alphanumeric character from a browser's character set.
Checked
2 | 3 | 3.2 | 4 | IE1 | M2A1 | N1 | O2.1
Required? No
Description:
This attribute indicates the initial value for the Radio button is ON if present. If this is omitted, the Radio button is OFF.
Values: NA
Disabled
2 | 3 | 3.2 | 4 | IE4B1 | M | N | O
Required? No
Description:
This is a stand-alone attribute which indicates the element is initially non-functional.
Values: NA
Name
2 | 3 | 3.2 | 4 | IE1 | M2A1 | N1 | O2.1
Required? No
Description:
This is a required attribute that associates a symbolic name to the field for submittal to the form processing script. A Radio button that represents a portion of a Radio GROUP will have the same NAME as the other Radio buttons in the group.
Values: Alphanumeric characters.
Tabindex
2 | 3 | 3.2 | 4 | IE4B1 | M | N | O
Required? No
Description:
"Tabbing" is a method of giving access/focus to an active HTML element using a standard keyboard sequence. All the active elements in a document can be cycled through using this sequence (ex: Windows TAB key.) The order of the active elements in this cycle is usually the order they occur in the document, but the TABINDEX attribute allows a different order to be established. The use of this attribute should create the following tabbing order cycle if the browser supports the attribute:
  1. Active elements using the TABINDEX attribute with positive integers are navigated first. Low values are navigated first.
  2. Active elements not specifying any TABINDEX attribute
Those elements carrying a DISABLED attribute or using negative TABINDEX values do not participate in the tabbing cycle.
Values: Positive or negative integers.
Type
2 | 3 | 3.2 | 4 | IE1 | M2A1 | N1 | O2.1
Required? Yes*
Description:
* This is the required TYPE attribute for this INPUT mechanism. From the strict view, the TYPE attribute is not required.
Values: RADIO
Value
2 | 3 | 3.2 | 4 | IE1 | M2A1 | N1 | O2.1
Required? No
Description:
This is a required attribute representing the symbolic result of the radio button field when activated that is passed to the form processing script.
Values: Alphanumeric characters.
Example
<form>
   <input TYPE="radio" VALUE="Jazz" NAME="Radio1">   Jazz<br>
   <input TYPE="radio" VALUE="New Age" NAME="Radio1">   New Age<br>
   <input TYPE="radio" VALUE="Rock" NAME="Radio1" CHECKED>   Rock!<br>
</form>
Parent Model
%In-line Parent% | %Block Parent%
Content Model
This element does not accept any content.
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