pv.storage.set = function (key, value) {
    localStorage.setItem(key, value);
}

pv.storage.get = function (key) {
    return localStorage.getItem(key);
}

pv.storage.delete = function (key) {
    return localStorage.removeItem(key);
}

pv.storage.setSession = function (key, value) {
    sessionStorage.setItem(key, value);
}

pv.storage.getSession = function (key) {
    return sessionStorage.getItem(key);
}

pv.storage.deleteSession = function (key) {
    return sessionStorage.removeItem(key);
}

pv.storage.clear = function () {
    localStorage.clear();
    sessionStorage.clear();
    return true;
}