Simple Chat Server with Socket.IO - Client Code

chat.client.js

socket.on('connect', function () {
    socket.on('message', function (data) {
        var newElement = document.createElement('li');
        newElement.innerHTML = data.message[0] + ' says: ' + data.message[1];
        document.getElementById("list").appendChild(newElement);
    });

    socket.on('announcement', function (data) {
        var newElement = document.createElement('li');
        newElement.className = 'announcement';
        newElement.innerHTML = data;
        document.getElementById("list").appendChild(newElement);
    });

    socket.on('history', function (data) {
        data.buffer.forEach(function (item) {
            var newElement = document.createElement('li');
            newElement.innerHTML = item.message[0] + ' says: ' + item.message[1];
            document.getElementById("list").appendChild(newElement);
        });
    });
});

function send_message() {
    socket.emit('message', document.getElementById("msg_input").value);
    document.getElementById("msg_input").value = "";
    return false;
}