function login()
{
$u=new Usser();
if($_POST)
{
$login=$this->input->post('login');
$password=md5($this->input->post('password'));
if($u->where('login',$login)->where('password',$passsword)->get()->exists())
{
$this->session->set_userdata('user', $u);
//print_r( $this->session->userdata('user'));
redirect("welcome");
}///more stuff after this but not relevant