Hi..I want to create a chat app.I'm using Strophe js with and xmpp server.I send a message to another client(Spark) and after that i can send one message from Spark to strophe client.Here is my code.I wil appreciate any help :)

var connection = new Strophe.Connection('http://localhost:5280/http-bind/');

                connection.connect('marian112@localhost', 'secret', function (status)
                    {
                        if (status == Strophe.Status.CONNECTED)
                        {   
                            console.log('Connected to server')
                            //connection.jid='marian12@localhost'
                            connection.addHandler(on_chat_message, null, 'message', 'chat',null,null);
                            connection.send($pres().c("priority").t("10"));
                            connection.addHandler(on_presence, null, 'presence');
                            connection.addHandler(on_error_iq, null, 'iq', 'error');
                            connection.send($pres().tree());
                            console.log(connection.jid);
                            var sendMessageQuery = $msg({to: 'marian@localhost/BBXFRONT', type: 'chat'}).c('body').t('AAAAAA');
                            connection.send(sendMessageQuery);
                        }
                    });
                var on_chat_message=function(msg) {
                    var sendMessageQuery = $msg({to: 'marian@localhost/BBXFRONT', type: 'chat'}).c('body').t('bbbb');
                    connection.send(sendMessageQuery);
                console.log(msg);
                console.log('You have received a message!');
                var to = msg.getAttribute('to');
                var from = msg.getAttribute('from');
                var type = msg.getAttribute('type');
                console.log(to+'  '+from+'   '+type);
                var elems = msg.getElementsByTagName('body');
                var message=Strophe.getText(body);
                console.log(message);
                return true;
            }

            var on_presence=function(stanza) {
                console.log(stanza);
                return true;
            }

            var on_error_iq=function(stanza) {
                console.log(stanza);
                return true;
            }