title: where's the cookie from?
body: <p>I've never visited one website before, for the first time I visit this website and try to login, I use fiddler to monitor the post data, </p>
  
  <p>in the http post header, there's already cookie in there. how would that happen?</p>
  
  <p>How can I generate a cookie to auto login the website?</p>
  
  <p>The following is the raw header.</p>
  
  <pre><code>POST https://us.battle.net/login/en/?ref=&amp;app= HTTP/1.1
  Host: us.battle.net
  Connection: keep-alive
  Content-Length: 64
  Cache-Control: max-age=0
  Origin: https://us.battle.net
  User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko)        Chrome/21.0.1180.77 Safari/537.1
  Content-Type: application/x-www-form-urlencoded
  Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
  Referer: https://us.battle.net/login/en/
  Accept-Encoding: gzip,deflate,sdch
  Accept-Language: en-US,en;q=0.8,en-GB;q=0.6
  Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
  Cookie: perm=1; __utma=134253166.2032096419.1344959743.1344959743.1344959743.1; __utmb=134253166.2.10.1344959743; __utmc=134253166; __utmz=134253166.1344959743.1.1.utmcsr=google|utmccn=(organic)|utmcmd=organic|utmctr=(not%20provided)
  
  accountName=aaaa%40me.com&amp;password=password&amp;persistLogin=on
  </code></pre>