      *  use group for all of the buttons or groupName for all of the buttons.
      *  In addition, all radio buttons in the group must have the same parent.  
      *
-     *  @default "radioButton"
+     *  @default "radioGroup"
      *  @see #group
      * 
      *  @throws ArgumentError If the radio button has a different parent than

        // If this button is in a rb group and it's selected, but it's not the 
        // current selection, deselect the old rb and select this rb.
        if (_group && selected && _group.selection != this)
            group.mx_internal::setSelection(this, false);        
    }
    
    //--------------------------------------------------------------------------

        invalidateDisplayList();

        dispatchEvent(new Event("groupNameChanged"));
    }

    //----------------------------------
    //  selected
    //----------------------------------
    
    /**
     *  @inheritDoc
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    override public function set selected(value:Boolean):void
    {
        super.selected = value;
        invalidateDisplayList();
    }

    //----------------------------------
