diff --git a/fbchat/client.py b/fbchat/client.py
index 9513725..77c409a 100644
--- a/fbchat/client.py
+++ b/fbchat/client.py
@@ -40,6 +40,7 @@ PingURL      ="https://0-channel-proxy-06-ash2.facebook.com/active_ping"
 UploadURL    ="https://upload.facebook.com/ajax/mercury/upload.php"
 UserInfoURL  ="https://www.facebook.com/chat/user_info/"
 RemoveUserURL="https://www.facebook.com/chat/remove_participants/"
+LogoutURL    ="https://www.facebook.com/logout.php"
 
 class Client(object):
     """A client for the Facebook Chat (Messenger).
@@ -160,6 +161,7 @@ class Client(object):
             r = self._get(BaseURL)
             soup = bs(r.text, "lxml")
             self.fb_dtsg = soup.find("input", {'name':'fb_dtsg'})['value']
+            self.fb_h = soup.find("input", {'name':'h'})['value']
             self._setttstamp()
             # Set default payload
             self.payloadDefault['__rev'] = int(r.text.split('"revision":',1)[1].split(",",1)[0])
@@ -188,6 +190,19 @@ class Client(object):
         else:
             return False
 
+    def logout(self, timeout=30):
+        data = {}
+        data['ref'] = "mb"
+        data['h'] = self.fb_h
+        payload=self._generatePayload(data)
+        r = self._session.get(LogoutURL, headers=self._header, params=payload, timeout=timeout)
+        # reset value
+        self.payloadDefault={}
+        self._session = requests.session()
+        self.req_counter = 1
+        self.seq = "0"
+        return r
+
     def listen(self):
         pass
 
@@ -327,21 +342,27 @@ class Client(object):
         # Strip the start and parse out the returned image_id
         return json.loads(r._content[9:])['payload']['metadata'][0]['image_id']
         
-    def getThreadInfo(self, userID, start, end=None):
+    def getThreadInfo(self, userID, start, end=None, thread_type='user'):
         """Get the info of one Thread
 
         :param userID: ID of the user you want the messages from
         :param start: the start index of a thread
         :param end: (optional) the last index of a thread
+        :param thread_type: (optional) change from 'user' for group threads
         """
 
         if not end: end = start + 20
         if end <= start: end = start + end
 
         data = {}
-        data['messages[user_ids][%s][offset]'%userID] =    start
-        data['messages[user_ids][%s][limit]'%userID] =     end
-        data['messages[user_ids][%s][timestamp]'%userID] = now()
+        if thread_type == 'user':
+            key = 'user_ids'
+        else:
+            key = 'thread_fbids'
+
+        data['messages[{}][{}][offset]'.format(key, userID)] =    start
+        data['messages[{}][{}][limit]'.format(key, userID)] =     end
+        data['messages[{}][{}][timestamp]'.format(key, userID)] = now()
 
         r = self._post(MessagesURL, query=data)
         if not r.ok or len(r.text) == 0: