cookie 的跨域问题

//这个是在www.cnblogs.com里设置的cookie isReload。
var cookieName = ‘isReload‘;
var cookieValue = ‘1‘;
var myDate = new Date();
myDate.setMonth(myDate.getMonth() + 1);
document.cookie = cookieName + "=" + cookieValue + ";expires=" + myDate + ";domain=cnblogs.com" + ";path=/";

//这个是要拿到的cookie isReload
document.cookie.replace(/(?:(?:^|.*;\s*)isReload\s*\=\s*([^;]*).*$)|^.*$/, "$1");