title: Why the browser doesn't send cookies while requesting a JavaScript file?
body: <p>I'm loading [site1]/script.js on [site2]/page.html with <code>script</code> tag.
  And the browser does not send cookies while requesting a JS file.</p>
  
  <p>Response headers:</p>
  
  <pre>HTTP/1.1 200 OK
  Server: nginx
  Date: Thu, 02 Apr 2015 14:45:38 GMT
  Content-Type: application/javascript
  Content-Length: 544
  Connection: keep-alive
  Content-Location: script.js.php
  Vary: negotiate,Accept-Encoding
  TCN: choice
  Set-Cookie: test_id=551d5612406cd; expires=Sat, 02-Apr-2016 14:45:38 GMT; path=/
  Content-Encoding: gzip</pre>
  
  <p>Request headers - no cookies:</p>
  
  <pre>GET /script.js HTTP/1.1
  Host: [site1]
  Connection: keep-alive
  Cache-Control: max-age=0
  Accept: */*
  User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.101 Safari/537.36
  Referer: [site2]/page.html
  Accept-Encoding: gzip, deflate, sdch
  Accept-Language: ru,en-US;q=0.8,en;q=0.6,sk;q=0.</pre>