public function update()
 {
     if (Session::get_Account_type() == "Signatory") {
         $sql = "UPDATE users SET Picture='" . $this->Picture . "', Surname='" . $this->Surname . "', First_Name='" . $this->First_Name . "', Middle_Name='" . $this->Middle_Name . "', email_address='" . $this->email_add . "', Password='******',Assigned_Signatory = '{$this->Assigned_Signatory}' Where Username='******'";
     } else {
         $sql = "UPDATE users SET Picture='" . $this->Picture . "', Surname='" . $this->Surname . "', First_Name='" . $this->First_Name . "', Middle_Name='" . $this->Middle_Name . "', email_address='" . $this->email_add . "', Password='******' Where Username='******'";
     }
     if (mysql_query($sql)) {
         Session::set_password($this->Password);
         Session::set_firstname($this->First_Name);
         Session::set_middlename($this->Middle_Name);
         Session::set_surname($this->Surname);
         Session::set_photo($this->Picture);
         Session::set_emailAdd($this->email_add);
         return true;
     } else {
         return false;
     }
 }
 private function setSession($account_type)
 {
     $result = mysql_fetch_array($this->administrator_model->getUser(trim($_POST['username']), md5(trim($_POST['password']))));
     Session::set_surname(trim($result['Surname']));
     Session::set_firstname(trim($result['First_Name']));
     Session::set_middlename(trim($result['Middle_Name']));
     Session::set_emailAdd(trim($result['email_address']));
     Session::set_photo($result['Picture']);
     Session::set_Account_type($account_type);
 }