How to send new Cookies over socketio?

Question

HTTP Cookies

I use socketio to connect to the server
1. Load the markup and scripts
2. Add a new value to cookies with JavaScrip
3. Make a socketio connection

socket = io.connect(global.host + '/' + namespace, global.socket_cfg);
socket.on('connect', function () {});

On the server, I don't get the new value added by JavaScrip(2), but only the old ones that were there when the page was requested(1).
Is it possible to send new Cookies (dynamically added) on the socket without reloading the page