     /**
      *  The RadioButtonGroup object to which this RadioButton belongs.
      *  When creating radio buttons to put in a RadioButtonGroup, it is 
-     *  advisable to use group for all of the buttons or groupName for all of 
-     *  the buttons. The groupName will be set to the generated name of the 
+     *  advisable to use either the <code>group</code> property 
+     *  or the <code>groupName</code> property for all of 
+     *  the buttons.  The <code>groupName</code> property will be set 
+     *  to the generated name of the 
      *  RadioButtonGroup object.
      *  
      *  @default the default RadioButtonGroup

 *  within a set of mutually exclusive choices.
 *  A RadioButton group is composed of two or more RadioButton controls
 *  with the same <code>groupName</code> property.
 *  The RadioButton group can refer to a group created by the
 *  <code>&lt;mx:RadioButtonGroup&gt;</code> tag.
 *  The user selects only one member of the group at a time.
 *  Selecting an unselected group member deselects the currently selected
 *  RadioButton control within that group.
 *
 *  <p>The RadioButton control has the following default characteristics:</p>
 *     <table class="innertable">

     *  Specifies the name of the group to which this RadioButton control belongs, or 
     *  specifies the value of the <code>id</code> property of a RadioButtonGroup control
     *  if this RadioButton is part of a group defined by a RadioButtonGroup control.
     *  All radio buttons with the same <code>groupName</code> property will be in the same tab group,
     *  even if they belong to different radio button groups. When creating
     *  radio buttons to put in a RadioButtonGroup, it is advisable to
     *  use either the <code>group</code> property 
     *  or the <code>groupName</code> property for all of the buttons.
     *
     *  @default <code>"RadioButtonGroup_<i>n</i>"</code>, where <i>n</i> is an integer greater
     *  than or equal to 0
     *  @see #group
     * 
     *  @langversion 3.0
