writeCookie(); 
function writeCookie() 
{ 
var today = new Date(); 
var the_date = new Date("December 31, 2023"); 
var the_cookie_date = the_date.toGMTString(); 
var the_cookie = "user_resolution="+ screen.width; 
var the_cookie = the_cookie + ";expires=" + the_cookie_date; 
document.cookie=the_cookie 

}