code: function(messageType, params) {
  			// check valid messageType
  			var message = messageType + F2.stringify(params);
  			jQuery.each(_apps, function(i, a) {
  				a.socket.postMessage(message);
  			});
  		}
docs: Broadcast an RPC function to all sockets
  @method broadcast
  @param {string} messageType The message type
  @param {Array} params The parameters to broadcast