var login_form = $('members-login-form');

if(login_form != null){

  login_form.observe('submit', function(event){

    var error_messages = [];
    var error_message = '';
    var login_name = $('login-name').getValue().strip();
    var password = $('password').getValue().strip();

    if(login_name.empty()){
      error_messages.push('Please enter your login name');
    }
    if(password.empty()){
      error_messages.push('Please enter your password');
    }

    if(!error_messages.empty()){
      error_messages.each(function(m){
	error_message += " - " + m + "\n";
      });
      alert(error_message);
      event.stop();
    }

  });

}