Is your feature request related to a problem? Please describe.

When the cookie is set on the client’s browser , it can persist for days , months or years , This makes it easy to save user preferences & visit information , The cookies are stored on the client’s hard disk , so , if the server crashes , the cookies are still available .

Describe the solution you'd like

First, we create a function that stores the name of the visitor in a cookie variable:

function setCookie(cname, cvalue, exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays2460601000));
var expires = "expires="+ d.toUTCString();
document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}