webstorage 分sessionStorage和localstorage，sessionStorage是临时保存，localStorage是永久保存。 sessionStorage如果浏览器关闭了，数据就没有了，而localStorage则不会。
示例
<span style="font-family:Microsoft YaHei;font-size:18px;"><!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script language="JavaScript">
function saveStorage(id){
var target = document.getElementById(id);
var str = target.value;
sessionStorage.setItem("msg", str);
}
function loadStorage(id){
var target = document.getElementById(id);
var msg = sessionStorage.getItem("msg");
target.innerHTML = msg;
}
</script>
</head>
<body>
<p id="msg"></p>
<input type="text" id="input"/>
<button onclick="saveStorage('input')">保存数据</button>
<button onclick="loadStorage('msg')">获取数据</button>
</body>
</html></span>原文：http://blog.csdn.net/wangxw8746/article/details/40506947