<script>
                    function formSubmit(e){

                        e.preventDefault();
                        var dataString = '&name=' + $('input[name=name]').val() +
                            '&email=' + $('input[name=email]').val() +
                            '&phone=' + $('input[name=phone]').val() +
                            '&message=' + $('textarea[name=message]').val() +

                            $.ajax({
                                type: "POST",
                                url: "submit.php",
                                data: dataString,
                                success: function() {
                                    alert('Form Successfully Submitted');
                                },
                                error: function() {
                                    alert('There was an error submitting the form');
                                }
                            });
                        return false;
                    }
                    }
                </script>