html5 本地存储localStorage实现cookie的效

html5 本地存储localStorage实现cookie的效果(目前只适合中国地区)
<pre>var myLocalStorage;
if(typeof localStorage == 'undefined'){
myLocalStorage= new localStorageClass();
myLocalStorage.init();
} else {
myLocalStorage=window.localStorage;
}
//设置cookie
function setCookie(name, value, str) {
myLocalStorage.setItem(name,escape(value));
expCookie(name, str);
}
//获取cookie的值
function getCookie(name) {
var now = new Date();
var nowDate = now.getTime();
var nowValue = myLocalStorage.getItem(name);
var expDate = myLocalStorage.getItem(name+"expCookie");
if(nowValue !=null && nowValue !='') {
if(nowDate > expDate){
return "";
} else {
return unescape(nowValue);
}
}else{
return "";
}
}
//设置cookie到期时间
function expCookie(name, str) {
var exp = new Date();
exp = exp.getTime()+ getMillisec(str);
var val = myLocalStorage.getItem(name);
if (val != null){
myLocalStorage.setItem(name+"expCookie",exp);
}
}
//删除cookie
function delCookie(name){
var name = escape(name);
myLocalStorage.removeItem(name);
}
//删除所有cookie
function delAllCookie(){
myLocalStorage.clear();
}
//cookie到期时间处理
function getMillisec(str) {
var sign = str.substring(0,1);
var value = str.substring(1,str.length);
if(sign == "s"){
return value * 1000;
}else if(sign == "m"){
return value * 60 * 1000;
}else if(sign == "h"){
return value * 60 * 60 * 1000;
}else if(sign == "d"){
return value * 24 * 60 * 60 * 1000;
}else{
return value;
}
}</pre>
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