https://kursy.doktormilosc.pl/dist/js/cookie.js

1function WHCreateCookie(name, value, days) {
2    var date = new Date();
3    date.setTime(date.getTime() + (days*24*60*60*1000));
4    var expires = "; expires=" + date.toGMTString();
5    document.cookie = name+"="+value+expires+"; path=/";
6}
7function WHReadCookie(name) {
8    var nameEQ = name + "=";
9    var ca = document.cookie.split(';');
10    for(var i=0; i < ca.length; i++) {
11        var c = ca[i];
12        while (c.charAt(0) == ' ') c = c.substring(1, c.length);
13        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
14    }
15    return null;
16}