var storage = window.localStorage;

1、存储 storage.setItem(“username”,”linwenhua”);
2、获取 storage.getItem(“username”);
3、清除单个 storage.removeItem(“username”);
4、清除所有 storage.clear();
5、也可以存储json

var obj = { 1:'world',2:'读者',3:'啊比利亚',4:'绝望' }; 
var str = JSON.stringify(obj);//json转字符串
storage.setItem("obj",str);
str = storage.getItem("obj");
obj = JSON.parse(str);//字符串转json

6、json的遍历

for(var o in obj){
 alert("KEY:"+o+"VALUE:"obj[o]);
}

7、json删除

delete obj[o];