#setting up the browser
mySite = 'http://example.com/managament.php?'
postData = {'UserID' : '', 'Action':'Delete'}
job_tab1_user1 = [1,2,3]
job_tab2_user1 = [4,5,6]
job_tab1_user2 = [7,8,9]
job_tab2_user2 = [10,12,13]
.... till user1000
#i want to point out that the lists are 100% different
def user1_jobs:
    for i in job_tab1_user1:
        browser.open("http://example.com/jobs.php?actions="+i)
        browser.open(mySite, Post_data)
    for i in job_tab2_user1:
        browser.open("http://example.com/jobs.php?actions="+i)
        browser.open(mySite, Post_data)
def user2_jobs:
    for i in job_tab1_user2:
        browser.open("http://example.com/jobs.php?actions="+i)
        browser.open(mySite, Post_data)
    for i in job_tab2_user2:
        browser.open("http://example.com/jobs.php?actions="+i)
        browser.open(mySite, Post_data)
... and so on till user 1000

t_user1 = threading.Thread(target=user1_jobs, args=[])
t_user1.start()
t_user2 = threading.Thread(target=user2_jobs, args=[])
t_user2.start()

from threading import *

submits = [[1,2,3], [3,4,5], [6,7,8]]

class worker(Thread):
    def __init__(self, site, postdata, data):
        Thread.__init__(self)
        self.data = data
        self.site = site
        self.postdata = postdata
        self.start()
    def run(self):
        for i in self.data:
            browser.open("http://example.com/jobs.php?actions="+str(i))
            browser.open(self.site, self.postdata)
for obj in submits:
    worker('http://example.com/managament.php?', {'UserID' : '', 'Action':'Delete'}, submits)

for index in range(0,1000):
    worker('http://example.com/managament.php?', {'UserID' : '', 'Action':'Delete'}, [i for i in range(1,4)])

# define your variables here
NUM_USERS = 1000
NUM_JOBS_PER_USER = 3
NUM_TABS_PER_USER = 2
URL_PART = "http://example.com/jobs.php?actions="

# populate our list of jobs
# the structure is like this: jobs[user][tab][job]

jobs = [[[0 for y in range(NUM_JOBS_PER_USER)]
            for x in range(NUM_TABS_PER_USER)]
            for x in range(NUM_USERS)]
p = 1
for i in range(NUM_USERS):
    for j in range(NUM_TABS_PER_USER):
        for k in range(NUM_JOBS_PER_USER):
            jobs[i][j][k] = p
            p += 1


# create a generator that builds our thread functions
def generateFunctions(jobs):
    for user in jobs:
        for tab in user:
            for job in tab:
                def f():
                    browser.open(URL_PART + str(job))
                    browser.open(mySite, Post_data)
                yield f

# create and start threads, add them to a list
# if we need to preserve handlers for later use
threads = []
for f in generateFunctions(jobs):
    thr = threading.Thread(target = f, args=[])
    thr.start()
    threads.append(thr)