Using urllib2 to post data

[PurdueSi]

Greetings all,

I'm trying to post data to a form on a web page using urllib2. Thus far I've had success however once data is entered in the form and the form is submitted, a second confirmation page is loaded where I need to click an 'OK' button again.

Here is the code I have that works, but I can't figure out how to click OK on the page that this code yields. Any help would be appreciated.

Note that prior to this code I've handled some authentication so I can get to this page.

theurl = "http://s8.travian.com/build.php?newdid=238573&gid=17&id=22"
txdata = 'id=22&r1=100&r2=101&r3=102&r4=103&dname=5+Saipem&x=&y=&s1=ok'
txheaders =  {'User-agent' : 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.8) Gecko/2009032711 Ubuntu/8.10 (intrepid) Firefox/3.0.8'}
req = urllib2.Request(theurl, txdata, txheaders)
response = urllib2.urlopen(req)
the_page = response.read()