function xml2json(xml) {
    try {
      var obj = {};
      if (xml.children.length > 0) {
        for (var i = 0; i < xml.children.length; i++) {
          var item = xml.children.item(i);
          var nodeName = item.nodeName;

          if (typeof (obj[nodeName]) == "undefined") {
            obj[nodeName] = xml2json(item);
          } else {
            if (typeof (obj[nodeName].push) == "undefined") {
              var old = obj[nodeName];

              obj[nodeName] = [];
              obj[nodeName].push(old);
            }
            obj[nodeName].push(xml2json(item));
          }
        }
      } else {
        obj = xml.textContent;
      }
      return obj;
    } catch (e) {
      console.log(e.message);
    }
  }

  var xmlInText = '<?xml version="1.0" encoding="windows-1251" ?>' +
    '<CurrencyRates Name="Daily Exchange Rates" Date="16.11.2017">' +
    '<Currency ISOCode="USD">' +
    '        <Nominal>1</Nominal>' +
    '        <Value>69,7496</Value>' +
    '    </Currency>' +
    '    <Currency ISOCode="EUR">' +
    '        <Nominal>1</Nominal>' +
    '        <Value>82,5940</Value>' +
    '    </Currency>' +
    '    <Currency ISOCode="KZT">' +
    '        <Nominal>1</Nominal>' +
    '        <Value>0,2097</Value>' +
    '    </Currency>' +
    '    <Currency ISOCode="RUB">' +
    '        <Nominal>1</Nominal>' +
    '        <Value>1,1577</Value>' +
    '    </Currency>' +
    '</CurrencyRates>';
  var xml = new DOMParser().parseFromString(xmlInText,"text/xml");
  console.log(xml2json(xml))