I'm starting learning node.js, but I have a little problem. I have an ajax function that call a server listening on port 8001. Afer I open and load a .json file and I want to send back to the page. For what concern the loading, there is no problem, but when I send back to the page, I get this error :
on Chrome "POST http: //localhost:8001/ net::ERR\_CONNECTION\_REFUSED";
on Firefox "...Reason : CORS request failed."

here the code of my simple file .js : 

```
    var http = require('http'),
          fs = require('fs'),
         url = require('url');

    http.createServer(function (request, response) {
        var path = url.parse(request.url).pathname;
        console.log("request recieved");
        var obj;
        fs.readFile('../menu.json', 'utf8', function (err, data) {
            if (err) throw err;
            console.log(data);
            obj = JSON.parse(data);
            console.log(obj);
            response.writeHead(200, { "Content-Type": "application/json" });
            response.end(obj, "utf-8");        
        });   

    }).listen(8001);
    console.log("server initialized !!");

```

How can I make it works? I also read the other topic, but I have not found a solution. Thank you in advance for your time and patience. 

Edit :
here is the ajax call :

```
   function testNodeJs() {
    var xmlhttp = new XMLHttpRequest();
    xmlhttp.open("POST", "http://localhost:8001/", true);
    xmlhttp.onreadystatechange = function () {
        if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
            var string = xmlhttp.responseText;
            alert(string);
        }
    }
    xmlhttp.send();
};

```