Ajax

//Все это в разных файлах.
//index.html клиентская часть
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Page</title>
<meta name="generator" content="WYSIWYG Web Builder 11 - http://www.wysiwygwebbuilder.com">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="font-awesome.min.css" rel="stylesheet">
<link href="index.css" rel="stylesheet">
<script src="jquery-1.11.3.min.js"></script>
<script src="wb.parallax.min.js"></script>
<script>
$(document).ready(function()
{
   $('#FirstLayer').parallax();
});
</script>

</head>
<body>
<div id="FirstLayer">
<div id="FirstLayer_Container">
<div id="ContentLayer">
<div id="ContentLayer_Container">
<div id="PageFooter">
<div id="PageFooter_Container">
</div>
</div>
<div id="LoginLayer">
<div id="LoginLayer_Container">
<div id="wb_Login">
<form name="loginform" method="post" id="loginform">
<input type="hidden" name="form_name" value="loginform">
<table id="Login">
<tr>
   <td class="header"></td>
</tr>
<tr>
   <td class="label"><label for="username">Имя пользователя</label></td>
</tr>
<tr>
   <td class="row"><input class="input" name="username" type="text" id="username" ></td>
</tr>
<tr>
   <td class="label"><label for="password">Пароль</label></td>
</tr>
<tr>
   <td class="row"><input class="input" name="password" type="password" id="password"></td>
</tr>
<tr>
   <td class="row"><input id="rememberme" type="checkbox" name="rememberme"><label for="rememberme">Запомнить меня</label></td>
</tr>
<tr>
   <td style="text-align:center;vertical-align:bottom"><input class="submit" type="submit" name="login" value="Вход" id="login"></td>
</tr>
</table>
</form>
</div>
<div id="wb_TextLogin">
<span style="color:#424242;font-family:Impact;font-size:48px;">Вход</span><br><p>{{title}}</p></div>
</div>
</div>
</div>
</div>
<script>
$(document).ready(function()
{
   $('#loginform').submit(function(e){
        e.preventDefault();
        var username = $('#username').val();
        var password = $('#password').val();
        $.post( "/ajax",{username: username}, function(data) {
            console.log(data);
        }, 'json');
   });
});
</script>
</body>
</html>

// серверная часть - index.js


var express = require('express');
var app = express();
var bodyParser = require("body-parser");

var templating = require('consolidate');
app.engine('html', templating.handlebars);
app.set('view engine','html');
app.set('views', __dirname + '/views'); // + '/views'

var bParse = bodyParser.urlencoded({extended: false});
var jParse = bodyParser.json();

app.use(express.static(__dirname + '/views'));

app.get('/', function(req, res){
    res.render('index');
});

app.post('/ajax', jParse, function(req, res){
    console.log(req.body.username);
    res.json(`${req.body.username}`);
});

app.listen(3000, function () {
  console.log('Example app listening on port 3000!');
});