HTML5 localStorage
Html5新出的Storage对象，分成2种：sessionStorage和localStorage。注意：首字母都是小写--->window.sessionStorage和window.localStorage
API一致：getItem, setItem, clear, length, removeItem, key
sessionStorage.key(1)--->返回第2个item的key
试验了localStorage，发现大多数浏览器都能用这个对象了
无论是刷新页面也好，关闭浏览器也好，都会remember住localStorage的values
代码如下：
<body>
<label >-</label>
<input type="button" onclick="javascript:AddOne();RefreshCount();" value="Add" />
<script language="javascript" type="text/javascript">
<!--
function AddOne() {
if (window.localStorage.Count == null || window.localStorage.Count == undefined)
window.localStorage.Count = 0;
window.localStorage.Count = parseInt(window.localStorage.Count) + 1;
}
function RefreshCount() {
document.getElementById("lbl").innerHTML = window.localStorage.Count;
}
if (window.localStorage == null || window.localStorage == undefined)
alert("window.localStorage not support.");
else
RefreshCount();
//-->
</script>
</body>