• yui
• ::
• Class ButtonGroup
• ::
• checkedButton

config:checkedButton
value:YAHOO.widget.Button
content:เป็น configuration attribute ของ buttongroup
โดยจะใช้กำหนด button ที่จะถูกเลือกอยู่ ภายใน buttongroup
( default value คือ null )
example:var button_1 = { label: "Radio 1", value: "1" };
var button_2 = { label: "Radio 2", value: "2" };
var button_3 = { label: "Radio 3", value: "3" };
var attributes = { name: "button-group", checkedButton: button_2 }; 
var group_button = new YAHOO.widget.ButtonGroup ( "bgroup", attributes );
group_button.addButtons ( [ button_1, button_2, button_3 ] );