js学习cookie封装之添加

添加cookie
function setCookie(name,value,expires,domain){
var cookie = name + '=' + value;
//有失效日期时
if(expires){
cookie +=';expires' +expires
}

//有域名限制时
if(domain){
cookie += ';domain' + domain
}

//写入cookie
document.cookie = cookie;
}