var CAPICOM_CERTIFICATE_FIND_SHA1_HASH = 0; 
			var CAPICOM_AUTHENTICATED_ATTRIBUTE_SIGNING_TIME = 0; 
			var CADESCOM_CADES_BES = 0x01;
			var CAPICOM_ENCODE_BASE64 = 0;
			var CADESCOM_CADES_DEFAULT = 0;
			var CAPICOM_OID_KEY_ATTRIBUTES_EXTENSION = 2;
			var CADESCOM_AUTHENTICATED_ATTRIBUTE_DOCUMENT_NAME = 1;
			var CADESCOM_BASE64_TO_BINARY = 0x01;
			var CADESCOM_CADES_X_LONG_TYPE_1 = 0x5D;
			var CADESCOM_HASH_ALGORITHM_CP_GOST_3411 = 100;
			var CADESCOM_BASE64_TO_BINARY1 = 1;
			var CAPICOM_CERTIFICATE_INCLUDE_WHOLE_CHAIN = 1;
			
var oCerts = oStore.Certificates.Find(CAPICOM_CERTIFICATE_FIND_SHA1_HASH, certSelecteed);//certSelecteed - выбранный сертификат

	if (oCerts.Count == 0) {
		alert("Certificate not found");
		return;
	}
var oCert = oCerts.Item(1);
	oSigner.Certificate = oCert; 
	
	if (txtDataToSign.length > 0) {  //txtDataToSign - base64 данные, полученные средствами php (base64_encode())
					 oSignedData.ContentEncoding = CADESCOM_BASE64_TO_BINARY; 
				  	 
						oSignedData.Content = txtDataToSign; 
					   
							try {
								var sSignedData = oSignedData.SignCades(oSigner,CADESCOM_CADES_BES, false,CAPICOM_ENCODE_BASE64);	
							}
							catch (e) {
								alert("Не удалось подписать из-за ошибки: " + GetErrorMessage(e));
								return;
							}
							 
					} else {
						alert("Set data to Sign");
					}
					
					try {
            oSignedData.VerifyCades(sSignedData, CADESCOM_CADES_BES, false);
			 
        } catch (err) {
            alert("Failed to verify signature. Error: " + GetErrorMessage(err));
            return false;
        }
        //Далее отправляю sSignedData на сервер