Pls chk my login script

Sun Apr 24 18:05:11 EDT 2011

I have written a python script for logging into a website. My script pulls up a 
browser page but does not log me in. Can any one suggest if I i am wrong in nay 
way,though the script is correct I am sure
My script is as below
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import cookielib
import urllib
import urllib2
import httplib
if __name__ == '__main__':
 urlLogin = 'http://www.gmail.com'
 id = 'u2'
 passw = 'p2'
 fieldId = 'username'
 fieldPass = 'password'

 cj = cookielib.CookieJar()
 data = urllib.urlencode({fieldId:id, fieldPass:passw})
 opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
 urllib2.install_opener(opener)
 usock = opener.open(urlLogin)
 usock = opener.open(urlLogin, data)
 pageSource = usock.read()
 usock.close()
 print(pageSource)

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