flatten_json.js

  _flattenData: function(data) {
    for (var d in data) {
      if (data.hasOwnProperty(d)) {
        if (typeof data[d] == 'object' && data[d] !== null) {
          for (var nd in data[d]) {
            data[d + '_' + nd] = data[d][nd];
          }
          delete data[d];
        }
      }
    }
    return data;
  }