问window.open()在knockout.js中不工作

EN

function SaveBankCard(vm) {
if (viewModel._isBankCardChange()) {
    var modelJs = viewModel.BankCard.ToJS();

    return $.ajax({
        method: "POST",
        url: "../Profile/Save",
        dataType: "json",
        contentType: "application/json; charset=utf-8",
        data: JSON.stringify({
            currentCards: modelJs.Items,
            workerId: viewModel.Main.WorkerId()
        })

    })
        .done(function (changes) {
            viewModel._hashBankCardOld(viewModel.BankCard.GetHash());
            ShowSuccessContainer('Saved');

            if (changes.MemoAdded) {
                var url = '../Profile/Download?workerId='+ viewModel.Main.WorkerId();
                window.open(url, '_blank');
            }
        });
}

}