function login($username, $password){
  _setValue(_textbox("user"), $username);
  _setValue(_password("password"), $password);
  _click(_submit("Login"));
}

function addBooks($numJava, $numRuby, $numPython){
  _setValue(_textbox("q"), $numJava);
  _setValue(_textbox("q[1]"), $numRuby);
  _setValue(_textbox("q[2]"), $numPython);
  _click(_button("Add"));
}

function verifyTotal($total){
  _assertEqual($total, _textbox("total").value);
}