web storage: sessionStorage 和 localStorage

// sessionStorage.setItem("message",str);function saveStorage(id){    var target = document.getElementById(id);    var str = target.value;    //保存数据的方法 key value    localStorage.setItem("message",str);}

function loadStorage(id){    var target = document.getElementById(id);    var msg = localStorage.getItem("message");    target.innerHTML = msg;}