var CAPICOM_CERTIFICATE_FIND_SHA1_HASH = 0,
    CADESCOM_BASE64_TO_BINARY = 1,
    CADESCOM_CADES_BES = 1;

function sign_crypto_pro(data, cert_id) {
    try {
        var oStore = CreateObject("CAPICOM.Store");
        oStore.Open();
        var oCertificates = oStore.Certificates.Find(CAPICOM_CERTIFICATE_FIND_SHA1_HASH, cert_id),
            oCertificate = oCertificates.Item(1),
            oSigner = CreateObject("CAdESCOM.CPSigner"),
            oSignedData = CreateObject("CAdESCOM.CadesSignedData");
        oSigner.Certificate = oCertificate;
        oSignedData.ContentEncoding = CADESCOM_BASE64_TO_BINARY;
        oSignedData.Content = data;
        var sSignedMessage = oSignedData.SignCades(oSigner, CADESCOM_CADES_BES, true);
        oStore.Close();
    }
    catch (err) {
        return false;
    }
    return sSignedMessage;
}

var sSignedMessage = oSignedData.SignCades(oSigner, CADESCOM_CADES_BES, true);