在表单导航中如何判断其进行到第几步

直接代码中的处理方式
 $(document).ready(function() {
        $("#form").steps({
            bodyTag: "fieldset",
            onStepChanging: function(event, currentIndex, newIndex) {
                if(currentIndex == 0) {
                    var isAdmin = false;
                    var phone = $("#number").val();
                    var code = $("#verification").val();
                    if(phone == '') {
                        $("#phone_warn").html("<p style=\"color: red;font-size: 12px;\">手机号码为空!</p>");
                        return false;
                    }
                    if(!isPoneAvailable(phone)){
                        $("#phone_warn").html("<p style=\"color: red;font-size: 12px;\">手机号码格式不正确,请重新输入!</p>");
                        document.getElementById("number").value = "";
                        return false;
                    }
                    if(code == '') {
                        $("#code_warn").html("<p style=\"color: red;font-size: 12px;\">验证码为空!</p>");
                        return false;
                    } else {
                        $("#code_warn").html("");
                    }
                    $.ajax({
                        url: '/checkVerificationCode',
                        type: 'POST',
                        async: false,
                        data: {phone: phone, code: code},
                        beforeSend: function() {
                        },
                        success: function(result) {
                            if (result.code != 1) {
                                layerMessage("验证失败,请重新填写手机号和验证码！");
                            } else {
                                isAdmin = true;
                            }
                        },
                        error: function(XMLHttpRequest, textStatus, errorThrown) {
                            layerMessage(textStatus);
                        }
                    });
                    return isAdmin;
                }
                if(currentIndex == 2 && newIndex == 3) {
                    initorganizationType();
                };
                if(currentIndex > newIndex) {
                    return true;
                }
                var form = $(this);
                if(currentIndex < newIndex) {

                    $(".body:eq(" + newIndex + ") label.error", form).remove();
                    $(".body:eq(" + newIndex + ") .error", form).removeClass("error")
                }
                form.validate().settings.ignore = ":disabled,:hidden";
                return form.valid()
            },
            onFinishing: function(event, currentIndex) {
                var form = $(this);
                form.validate().settings.ignore = ":disabled";
                return form.valid()
            },
            onFinished: function(event, currentIndex) {
                var datas = $("#form").serializeArray();
                $.ajax({
                    url: '/moreInfo',
                    type: 'POST',
                    data: datas,
                    beforeSend: function() {

                    },
                    success: function(result) {
                        if (result.code != 1) {
                            if (result.data instanceof Array) {
                                $.each(result.data, function(index, value) {
                                    layerMessage("提交失败,请重新核对！");
                                });
                            } else {
                                layerMessage("提交失败,请重新核对！");
                            }
                        } else {
                            location.replace("/manage/player/mobile/welcome");
                        }
                    },
                    error: function(XMLHttpRequest, textStatus, errorThrown) {
                        layerMessage(textStatus);
                    }
                });
            }
        }).validate({
            errorPlacement: function(error, element) {
                element.before(error)
            }

        })
    });