NowJs server different to web server
===

I'm playing around with nodejs and specifically looking at nowjs

I've got now up and running on a server running node and I have a separate web server. I successfully have the node server returning the client script and I reference this on the web server. This returns a 200 response code and all looks well. However I get javascript errors telling me that 'now' is undefined. As far as I understand it the 'now' variable should be available via the client script but this doesn't seem to be the case. Does anyone know if this set-up is possible? So the set-up is similar to the below pseudo code

     //Server 1 node.com
     if(request.url === '/nowjs/now.js'){
          var file = 'path_to_clientlib/now.js';
      fs.readFile(file, function(e, data) {

            if (e) {
               throw e;
            }
            
             response.writeHead(200,{'Content-Type': 'application/javascript'});
              response.end(data);
    }

and server.com

       <script src="/jquery.js"></script>
       <script src="http://node.com/nowjs/now.js"></script> <!-- This is returned properly -->
       <script>
       $(document).ready(function(){

        now.receiveMessage = function(name, message){
          $("#messages").append("<br>" + name + ": " + message);
        }

       $("#send-button").click(function(){
         now.distributeMessage($("#text-input").val());
         $("#text-input").val("");
       });

       now.name = prompt("What's your name?", "");

       });
       </script>

      <div id="messages"></div>
      <input type="text" id="text-input">
      <input type="button" value="Send" id="send-button">


Straight away the console just returns 'now' is not defined