jquery - Simple chat application not working on live website -

i'am new nodejs. following tutorial online on how make socket.io(chat application). made simple application works offline, in order work, have go command prompt, go project , type : node server : start sever on port 3000.

i wanted put small application onto website, did here

but when try type in chat box wont display, , giving me bunch of errors in console. know has port. don't know how make work on live website.

here server side code:

// include of our modules var express = require('express');  // set variable "app" = 'express' variable var app = express();  // set our server variable, , pass in 'app' variable var server = require('http').createserver(app);  // include socket.io , listen 'server' variable var io = require('socket.io').listen(server);   // * going have 2 arrays // 1 users, other 1 connections users = []; connections = [];   // run server, , listen assigned port server.listen(process.env.port || 3000);   console.log('server running...');   // create route, function going take in "request" , "response" app.get('/', function (req, res) {     res.sendfile(__dirname + '/index.html'); });   // open connection socket.io io.sockets.on('connection', function(socket) {     connections.push(socket);     console.log('connected: %s sockets connected', connections.length);      // write our disconnect, , console.log how many still connected     socket.on('disconnect', function (data) {         connections.splice(connections.indexof(socket), 1);         console.log('disconnected: %s sockets connected', connections.length);     });       // send message     socket.on('send message', function (data) {         // emmit new message event         io.sockets.emit('new message', {msg: data});     })  }); 

here client side code:

 <div class="container">         <div class="row">             <div class="col-md-4">                 <div class="well">                     <h4>online users</h4>                     <ul class="list-group" id="users"></ul>                 </div>             </div>             <div class="col-md-8">                 <div class="chat" id="chat"></div>                  <form id="messageform">                     <div class="form-group">                         <label>enter message</label>                         <textarea class="form-control" id="message"></textarea>                         <br />                         <input type="submit" class="btn btn-primary" value="send message">                     </div>                 </form>              </div>         </div>     </div>      <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>     <script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.4.6/socket.io.js"></script>     <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>      <script>         $(function() {             var socket = io.connect();             var $messageform = $('#messageform');             var $message = $('#message');             var $chat = $('#chat');              // create event when form submitted             $messageform.submit(function(e) {                 e.preventdefault();                 socket.emit('send message', $message.val());                 $message.val('');             });              socket.on('new message', function(data) {                 $chat.append('<div class="well">'+data.msg+'</div>');             });         });     </script> 

socket.io auto-configures connection when ommit connection url

to precise pass url io.connect (more info)

var socket = io.connect('http://<website_name>:<port>/'); 

like example in case:

var socket = io.connect('http://davidtrushkov.com:3000/');