Problems When passing data via ajax

I have a form where it is validated by jqBootstrapValidation.js, and it is sent to another file, which is the file below:

// Contact Form Scripts

$(function() {

    $("#usuariosForm input,#usuariosForm textarea").jqBootstrapValidation({
        preventSubmit: true,
        submitError: function($form, event, errors) {
            // additional error messages or events
        },
        submitSuccess: function($form, event) {
            event.preventDefault(); // prevent default submit behaviour
            // get values from FORM
            var txtnome = $("input#txtnome").val();
            var ememail = $("input#ememail").val();
            var txtusuario = $("input#txtusuario").val();
            var pwdsenha = $("input#pwdsenha").val();
            var urltxt = $("input#urltxt").val();

            var firstName = name; // For Success/Failure Message
            // Check for white space in name for Success/Fail message
            if (firstName.indexOf(' ') >= 0) {
                firstName = name.split(' ').slice(0, -1).join(' ');
            }

            $('#submit').html("...Enviando");
            $('#submit').prop("disabled", true);

            $.ajax({
                url: urltxt,
                type: "POST",
                data: {
                    txtnome: txtnome,
                    ememail: ememail,
                    txtusuario: txtusuario,
                    pwdsenha: pwdsenha
                },
                cache: false,
                success: function() {
                    // Success message
                    $('#success').html("<div class='alert alert-success'>");
                    $('#success > .alert-success').html("<button type='button' class='close' data-dismiss='alert' aria-hidden='true'>&times;")
                        .append("</button>");
                    $('#success > .alert-success')
                        .append("<strong>Registro realizado com sucesso</strong>");
                    $('#success > .alert-success')
                        .append('</div>');

                    //clear all fields
                    $('#usuariosForm').trigger("reset");
                    $('#submit').html("Enviar mensagem");
                    $('#submit').prop("disabled", false);

                },
                error: function() {
                    // Fail message
                    $('#success').html("<div class='alert alert-danger'>");
                    $('#success > .alert-danger').html("<button type='button' class='close' data-dismiss='alert' aria-hidden='true'>&times;")
                        .append("</button>");
                    $('#success > .alert-danger').append($("<strong>").text("Desculpe " + firstName + ", ocorreu um erro. Por favor tente novamente!"));
                    $('#success > .alert-danger').append('</div>');
                    //clear all fields
                    $('#usuariosForm').trigger("reset");
                },
            });
        },
        filter: function() {
            return $(this).is(":visible");
        },
    });

    $("a[data-toggle=\"tab\"]").click(function(e) {
        e.preventDefault();
        $(this).tab("show");
    });
});


/*When clicking on Full hide fail/success boxes */
$('#name').focus(function() {
    $('#success').html('');
});

But I'm in trouble, as I have several forms I always wanted to use the same function. and pass the url to it to do the sql correctly, that is, if I go to the user registration page it will do user registration. if it passes update_user it goes to the user change page. I tried a method of passing the url to ajax as follows:

<input type="text" name="urltxt" id="urltxt" class="form-control text-center" value="?folder=usuarios/&file=ins_usuarios_usuarios&ext=php" data-validation-required-message="Por favor não mude os dados." required>

And in the file it would receive in a variable, but it is not working. How can I do this? thank you very much! NOTE: The nomenclature of my pages are:? Folder = users / & file = ins_user_users & ext = php

I debugged the code see: