var jswarn = document.getElementById('jswarn');
jswarn.innerText = '';

var socket = io();
var form = document.getElementById('form');
var input = document.getElementById('input');

form.addEventListener('submit', function(e) {
    e.preventDefault();
    if (input.value) {
        socket.emit('chat message', input.value);
        input.value = '';
    }
});