kirim

 $(function() {
   $(".btn btn-primary").click(function() {

 dataString = $('#form').serialize();

 $.ajax({
      type: "POST",
      url: "http://localhost/KP/surat/admin/kirim_masuk.php",
      data: dataString,
      success: function() {
        $('#contact_form').html("<div id='message'></div>");
        $('#message').html("Data telah terinput!")
      }
     });
      return false;
     });
});