gistfile1.txt

var DBService = function () {};

DBService.prototype.insert = function (database, table, data) {
  var tableData = this.select(database, table);
  if(tableData != null) {
    for(var id in tableData) {}
    var lastId = parseInt(id) + 1;
  } else {
    tableData = {};
    var lastId = 1;
  }

  tableData[lastId] = data;
  localStorage.setItem(database + '-' + table, JSON.stringify(tableData));
}

DBService.prototype.select = function (database, table, query) {
  var data = localStorage.getItem(database + '-' + table);
  if(data == null) {
    return null;
  } else {
    return JSON.parse(data);
  }
}