success message and JQ calendaer open in asp.textbox click

Response.Write("<script>alert('Succssfully Booked')</script>");


 <script src="js/jquery-2.1.3.min.js"></script>
    <script src="js/jquery.vide.min.js"></script>
    <script type="text/javascript">
        $(function () {
           
            $('#txtdate').datepicker({

            }).on('change', function () {
                $('.datepicker').hide();
            });
        });

   
  </script>


<asp:TextBox runat="server" class="form-control" placeholder="Select the Appointment Date" ID="txtdate"></asp:TextBox>