...

            var oStore = createObject("CAPICOM.Store", cadesobject);
            if (!oStore) {
                alert("store failed");
                return;
            }

            try {
                oStore.Open(CAPICOM_CURRENT_USER_STORE, CAPICOM_MY_STORE, CAPICOM_STORE_OPEN_MAXIMUM_ALLOWED);
            }
            catch (e) {
                alert("Ошибка при открытии хранилища: " + new GetErrorMessage(e));
                return;
            }

            var oCertificates = oStore.Certificates.Find(CAPICOM_CERTIFICATE_FIND_SHA1_HASH, thumbprint);
            if (oCertificates.Count === 0) {
                alert("Certificate not found: " + thumbprint);
                return;
            }
            var oCertificate = oCertificates.Item(1);
            var oSigner = createObject("CAdESCOM.CPSigner", cadesobject);
            oSigner.Certificate = oCertificate;

            var oSignedXML = createObject("CAdESCOM.SignedXML", cadesobject);
            oSignedXML.SignatureType = CADESCOM_XML_SIGNATURE_TYPE_TEMPLATE;

            oSignedXML.Content = <a>aaa</a>;

            try {
                oSignedXML.Sign(oSigner);
            } catch (err) {
                alert("Ошибка создания подписи. Error: " + new GetErrorMessage(err));
                return;
            }

            oSignedXML.Content = <b>bbb</b>;

            try {
                oSignedXML.Sign(oSigner);
            } catch (err) {
                alert("Ошибка создания подписи. Error: " + new GetErrorMessage(err));
                return;
            }