函数在ajax调用中不起作用

Question

我在我建立的小型库中有以下功能：

HB.FormButtons.inputs = $("input[type='submit'], input[type='button'], button[type='submit'], button.button, .search-button, a.button");
HB.FormButtons.disableFormButtons = function(form) {
    form.find(HB.FormButtons.inputs).prop('disabled', true);
}

但是我在以下内容中调用它：

HB.PaymentDetails.deleteSavedCard = function (submittedForm) {
    var cardIdToDelete = submittedForm.find('.deletedCardId').val();
    $.ajax({
        url: submittedForm.attr('action'),
        type: 'POST',
        xhrFields: {
            withCredentials: true
        },
        beforeSend: function() {
            HB.FormButtons.disableFormButtons($(HB.PaymentDetails.deleteCardFormSelector));
        },
        data: submittedForm.serialize()
    }).done(function(){
        HB.PaymentDetails.deleteSavedCardDoneHandler(cardIdToDelete);
    }).fail(function(xhr){
        HB.PaymentDetails.deleteSavedCardFailHandler(xhr, cardIdToDelete)
    })
};

内部功能＆＃34; beforeSend＆＃34;没有被调用，我怎样才能使它工作，以便它也可以在ajax调用中工作？