anchor.diff:            'status'    : true,
             'cookie'    : true,
             'xfbml'     : true,
  +          'version'   : 'v2.0',
             'oauth'     : true
             ${ authResponse != null ? ", 'authResponse': '$authResponse' " : "" }
             ${ _channelURL != null ? ", 'channelUrl': '$_channelURL' " : "" }
  
positive.code: 
      
      fqlQuery(fql, (JsObject resp) {
        _processQueryFriends(resp, functResponse) ;
      });
      
    }
    
    void _processQueryFriends( JsObject resp , void functResponse( List<Map<String,String>> friends )  ) {
      List<Map<String,String>> friends = [] ;
      
      var data = resp['data'] ;
      num sz = data.length ;
      
      for (int i = 0 ; i < sz ; i++) {
        var user = data[i] ;
        
        var uid = user['id'] ;
        if (uid == null) uid = user['uid'] ;
        
        String name = user['name'] ;
        
        friends.add( { 'uid': '$uid' , 'name': name } ) ;
      }
      
      functResponse(friends) ;
    }
    
  }
  
  //////////////////////////////////////////////////////////
  
  class FacebookLoginStatus {
    JsObject _obj ;
  
negative.code:     script.onLoad.listen( (e) => onSucess() , onError: (e) => onError() , cancelOnError: true) ;
      
      head.children.add(script) ;
      
      return true ;
    }
    
    static jsEval(String code) {
  