There is a web page with JS script (use Jquery 2.1.4). The page is located on my PC. 1 ) JS script do get request via ajax to PHP script. The php script located on internet web site. 2) The PHP script return header: Set-Cookie PHPSESSID=r9uu08ora41aaogsulop11kdb1; path=/ 3) So JS script send next ajax GET request, but cookie not send. Why ?