Branching questions in express prototype

gistfile1.js

    var bodyParser = require("body-parser");
    app.use(bodyParser.urlencoded({ extended: false }));

    var pages = [
      {
        next: {
          yes: 1,
          no: 4
        }
      },
      {
        next: {
          yes: 2,
          no: 4
        }
      },
      {
        next: {
          yes: 3,
          no: 4
        }
      }
    ];

    app.get('/page/:number', function (req, res) {

      res.send("Hello page " + req.params.number +
        "<form action='/page/" + req.params.number + "' method='post'>" +
        "<input type='radio' name='value' value='yes'/> Yes" +
        "<input type='radio' name='value' value='no'/> No" +
        "<input type='submit' />" +
        "</form>");

    });

    app.post('/page/:number', function(req, res) {

      var nextPage = pages[req.params.number].next[req.body.value];
      res.redirect('/page/' + nextPage);

    });