public function login()
	{
		$this->load->library('trinity');
		$this->load->library('session');
		$username = $this->input->post('accname');
		$password = $this->input->post('accpw');
		if($this->session->userdata('logged_in'))
		{
			show_error('You are already logged in!');
		}
		else
		{
			$this->trinity->Login($username, $password);
			redirect('home');
		}
	}

(Controller's function)

 <form action="" method="post">
  <input class="inp1" type="text" name="accname" value="accname" />
  <input class="inp1" type="password" name="accpw" value="accpw" />
  <a href="/home/login"><img border="none" src="/themes/toxic2/images/buttons/login.png"/></a>
 </form>

(View's form)