function index(){
        $cs = file_get_contents(base_url().'chat/get_chat_setting');
        $cs = json_decode($cs);
        $userid = $cs->user_session;
        $this->load->view('layout/header');
        echo "LOGGED IN";
        echo anchor('dashboard/logout', 'LOGOUT');
        echo $this->session->userdata('dentist');
        $this->load->view('openchat',array('userid'=>$this->session->userdata($userid),'username'=>$this->session->userdata('dentist')));
        $this->load->view('layout/footer');
    }