input ajax

<div class="body">
                        <form method="post" class="form-simpan">
                            <div class="form-group">
                                <div class="form-line">
                                    <label for="nim">NIM</label>
                                    <input type="text" class="nim form-control" name="nim" id="nim" placeholder="Ex : 1610307057004" autofocus required>
                                </div>
                            </div>
                            <div class="form-group">
                                <div class="form-line">
                                    <label for="nama">Nama</label>
                                    <input type="text" class="form-control" name="nama" id="nama" placeholder="Ex : Budi Setiawan" autofocus required>
                                </div>
                            </div>
                            <div class="form-group">
                                <div class="form-line">
                                    <label for="email">Email</label>
                                    <input type="text" class="form-control" name="email" id="email" placeholder="Ex : Bangunpsb@gmail.com" autofocus required>
                                </div>
                            </div>
                            <div class="form-group">
                                <div class="form-line">
                                    <label for="password">Password</label>
                                    <input type="password" class="form-control" name="password" id="password" placeholder="Ex : ##############" autofocus required>
                                </div>
                            </div>
                            <div class="form-group">
                                <label for="level">Status Akses</label>
                                <select name="level" id="level" class="form-control show-tick" data-live-search="true" required>
                                    <option value="" disabled selected>Pilih Status</option>
                                    <option value="admin">ADMIN</option>
                                    <option value="karyawan">KARYAWAN</option>
                                </select>
                            </div>
                            <div class="form-group">
                                <div class="form-line">
                                    <label for="no_hp">No Hp</label>
                                    <input type="text" class="form-control" name="no_hp" id="no_hp" placeholder="Ex : 081232323" autofocus aria-required="">
                                </div>
                            </div>
                            <div class="form-group">
                                <button class="simpan btn btn-success">Simpan</button>
                            </div>
                        </form>
                    </div>

                </div>
            </div>
        </div>
        <!-- #END# Basic Examples -->
        <!-- #END# Widgets -->
    </div>
</section>


<script type="text/javascript">
    $(document).ready(function() {
        $(".simpan").click(function() {
            var data = $(".form-simpan").serialize("value");
            $.ajax({
                type: 'post',
                url: 'admin/simpan.php',
                data: {
                    "simpan": data
                },
                success: function(s) {
                    alert(data);
                    if (s = true) {
                        window.location.reload();
                    }
                }
            });
        });
    });
</script>