在其他瀏覽器中沒有問題，但是在IE8中就會出現問題，直接跳到$.ajax的error,alert回傳的readyState為0

    $.ajax({
            type: "POST",
            async: false,
            contentType: "application/x-www-form-urlencoded;charset=UTF-8",
            xhrFields: {
                withCredentials: true
            },
            url:url,
            data:data,
            success:function (response) {
                arr = response.Data.ListData;
            },
            error:function (XMLHttpRequest, textStatus, errorThrown) {
                alert(XMLHttpRequest.readyState);
            }
        });

readyState: