Smopp_v2/machinechildadded.js

$(document).ready(function() {
    $("#machinebut").click(function() {

        var machine = $("#machine").val();
        var namelink = $("#namelink").val();
        var machinebut = $("#machinebut").val();

        $.ajax({

            type: 'POST',
            url: 'machinechild.php',

            data: { machine:machine,machinebut:machinebut, namelink:namelink},
            success: function (msg) {

                $('#messagechild').html(msg);
            }
        });
    });
});