title: how to set cookie in python mechanize
body: <p>After sending request to the server</p>
  
  <pre><code>    br.open('http://xxxx')
      br.select_form(nr=0)   
      br.form['MESSAGE'] = '1 2 3 4 5'
      br.submit()
  </code></pre>
  
  <p>I get the response title, which has set-cookie</p>
  
  <pre><code>Set-Cookie: PON=xxx.xxx.xxx.111; expires=Tue, 17-Mar-2015 00:00:00 GMT; path=/
  </code></pre>
  
  <p>Because mechanize seems to be not able to remember the cookie, so I want to set cookie for br. How can I do it?</p>
  
  <pre><code>    cj = mechanize....?
      br.set_cookiejar(cj)
  </code></pre>
  
  <p>I have no idea.
  Please help</p>