JS Jobs Integration

Hi...
Iam working wiht EasySocial + JSJobs. EasySocial is my default registration form.
My problem is : when users register ... JSJobs needs insert into DB some values rules..
I need insert this code :
In below code change bold code with my code/variable

function onAfterStoreUser($user, $isnew, $success, $msg){ //j 1.5

            if( $isnew )

            {

                if(isset($_POST['userrole'])){

                    $db = &JFactory::getDBO();

                    $created = date('Y-m-d H:i:s');

                    $query = "INSERT INTO #__js_job_userroles (uid,role,dated) VALUES (".$user['id'].", ".$user['userrole'].", '".$created."')";

                    $db->setQuery( $query );

                    $db->query();



                    $componentAdminPath = JPATH_ADMINISTRATOR.'/components/com_jsjobs';

                    $componentPath = JPATH_SITE.'/components/com_jsjobs';

                                        if(file_exists($componentPath.'/JSApplication.php')){

                                            require_once $componentPath.'/JSApplication.php';

                                            $result = JSModel::getJSModel('userrole')->addUser($_POST['userrole'],$user['id']);

                                        }

                }

            }

        }

I need create a combobox in EasySocial registration form to make users choose JSJobs usergroup
1 for empployer
2 for job seeker

Or

I have 2 EasySocial profiles (employer and jobseeker) ... when users choose employer he will be asigned in employer Joomla usergroup and employer EasySocial profile/Usergroup.
So is it possible set in JSJobs DB automatically too??

Thanks in advance

Kazuo