xml='<invoice date="01-20-2000" number="123">' +
    '  <address country="US">' +
    '    <name>John Smith</name>' +
    '    <street>123 George St.</street>' +
    '    <city>Mountain View</city>' +
    '    <state>CA</state>' +
    '    <zip>94041</zip>' +
    '  </address>' +
    '</invoice>';
invoice = JSOM(xml);
alert(invoice.$number);
alert(invoice.address.name);