注意：只支持IE5，及其以上的浏览器
//需要使用 if 条件注释
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>IE 中使用userData来进行持久化数据</title>
<link rel="stylesheet" href="">
</head>
<body>
<script>
window.onload=function(){
var memory=document.createElement('div');
memory.id = '_memory';
memory.style.display = 'none';
memory.style.behavior = "url('#default#userData')";
document.body.appendChild(memory);
memory.load('myStoreData');
var name = memory.getAttribute('username');
if(!name){
var name = prompt('what is your name?');
memory.setAttribute('username',name);
memory.save('myStoreData');
}
};
function UserDataStorage(maxage){
var memory=document.createElement('div');
memory.id = '_memory';
memory.style.display = 'none';
memory.style.behavior = "url('#default#userData')";
document.body.appendChild(memory);
if(maxage){
var now = new Date().getTime();
var expires = now+maxage*1000;
memory.expires = new Date(expires).toUTCString();
}
memory.load('UserDataStorage');
this.getItem=function(key){
return memory.getAttribute(key) || null;
};
this.setItem=function(key,value){
memory.setAttribute(key,value);
memory.save('UserDataStorage');
};
this.removeItem=function(key){
memory.removeAttribute(key);
memory.save('UserDataStorage');
};
}
</script>
</body>
</html>