Node http server and BoneScript's analogRead

webAnalog.js

#!/usr/bin/node

// Load the http module to create an http server.
var http = require('http');
var b = require('bonescript');

var inputPin = "P9_33";

// Configure our HTTP server to respond to requests
// with the value of the analog input as a percentage
// of 1.8v.
var server = http.createServer(function (request, response) {
  value = Math.round(b.analogRead(inputPin) * 100);
  response.writeHead(200, {"Content-Type": "text/plain"});
  response.end("The value of the pot is: " + value + "%\n");
});

// Listen on port 8000, IP defaults to 127.0.0.1
server.listen(8000);

// Put a friendly message on the terminal
console.log("Server running at http://127.0.0.1:8000/");