I'm struggling to make a function which selects from database based on the id entered in a textbox. I wrote the code, but it shows in console this error and I can't figure why: TypeError: Cannot read property 'id' of undefined.

Code I have so far:

Client-side:

function select()

            {

                var id = $('#nr_reg').val();

                $.ajax({

                    type: 'post',

                    url: '/id',

                    data : {

                        id: id

                    },

                    succes: function(data){

                        var id = data.id;

                        alert(id);

                        $('#optic').val(id);

                    },

                    error: function(err){

                        console.log(err);

                    }



                }); 

            }

Server-side:

app.post('/id', function(req,res) {



    var data = req.body;

    var id = data.id;

    console.log(id);

    var query = SELECT * FROM Control WHERE id= +id;

    connection.query(query, function(error, result) {

            console.log(result);

            res.send(result);

    });

});

L.E:
Function select:

function select()

            {



                var id = $('#nr_reg').val();

                $.ajax({

                    type: 'post',

                    dataType: 'json',

                    url: '/id',

                    data : {

                        id: id

                    },

                    success: function(data){    

                        data = JSON.parse(data);                    

                        var id = data.id;

                        alert(merge);

                        $('#optic').val(id);

                    },

                    error: function(err){

                        console.log(err);

                    }



                }); 

            }