问在视图模型中从knockout的applyBindings()调用中获取关联的dom元素

EN

var _paymentMethodViewModel;
$(function () {
   _paymentMethodViewModel = new ViewModels.PaymentMethodViewModel("/Customer");
   ko.applyBindings(_paymentMethodViewModel, $("#PaymentMethodsList").get(0));
   // spinner should show up over the PaymentMethodsList dom element when this is called and when the ajax call is complete it should disappear
   _paymentMethodViewModel.getAllPaymentMethods();
});

self.getAllPaymentMethods = function () {
    // ******************
    // start spinner here
    // ******************
    var spinner = new Spinner(_spinnerOpts).spin(/* <need dom element here> */);

    $.ajax({
        url: self.rootUrl + "/GetAllPaymentMethods",
        type: "POST",
        data: {},
        context: self,
        success: function (result, textStatus, jqXHR) {
        },
        error: function (jqXHR, textStatus, errorThrown) {
        },
        complete: function (jqXHR, textStatus) {
            // ******************
            // stop spinner here
            // ******************
            spinner.stop();
        }
    });
}