messages.on('message_name',function(data){
  //receive data from any iframes
  //.....do something
  
  var sende_data = {
    'text':'nice to meet you to'
  };
  messages.down('iframe_name','replay_message_name',send_data);
});

messages.on('replay_message_name',function(data){
  //receive data from replyed container window or other replyed child iframes
  //.....do something
});
var sender_data = {
  'text':'nice to meet you'
};
messages.up('message_name',sender_data);