(1) For radio buttons, data is submitted only if a radio button is checked and it corresponds only to the checked radio button. For example, for radio buttons with name='nameAttributeValue' attribute: 1.) if the radio buttons are unchecked, nothing is submitted and the JavaScript nameAttributeValue property is undefined; and 2.) if a radio button is checked, nameAttributeValue=valueAttributeValue is submitted, where valueAttributeValue is from the value attribute of the checked radio button. |