AJAX from http://stackoverflow.com/questions/6011984/basic-ajax-send-receive-with-node-js

client.js

function server() {
   xmlhttp = new XMLHttpRequest();
   xmlhttp.open("GET","http://localhost:8001/getstring", true);
   xmlhttp.onreadystatechange=function(){
         if (xmlhttp.readyState==4 && xmlhttp.status==200){
           string=xmlhttp.responseText;
         }
   }
   xmlhttp.send();
}

server.js

var http = require('http'),
      fs = require('fs'),
     url = require('url'),
 choices = ["hello world", "goodbye world"];

http.createServer(function(request, response) {
    var path = url.parse(request.url).pathname;
    if(path=="/getstring"){
        var string = choices[Math.floor(Math.random()*choices.length)];
        response.writeHead(200, {"Content-Type": "text/plain"});
        response.end(string);
    }else{
        fs.readFile('./index.html', function(err, file) {  
            if(err) {  
                return;  
            }  
            response.writeHead(200, { 'Content-Type': 'text/html' });  
            response.end(file, "utf-8");  
        });
    }
}).listen(8001);