LocalStorage.js

/**
 * Локальное хранилище
 */

function LocalStorage() {}

LocalStorage.prototype.available = function() {
  try {
    var x = '__storage_test__';
    localStorage.setItem(x, x);
    localStorage.removeItem(x);
    localStorage.clear();
    return true;
  }
  catch(e) {
    return false;
  }
}

LocalStorage.prototype.set = function(name,data) {
  localStorage.setItem(""+name,JSON.stringify(data));
}

LocalStorage.prototype.get = function(name) {
  return JSON.parse(localStorage.getItem(name));
}

LocalStorage.prototype.del = function(name) {
  localStorage.removeItem(name);
}

LocalStorage.prototype.getAll = function() {
  var arr=[]; //массив всех записей
  var length=localStorage.length;
  for (var i=0;i<length;i++) {
    arr[i]=this.get(localStorage.key(i));
  }
  return arr;
}

LocalStorage.prototype.delAll = function() {
  localStorage.clear();
}