checkLoginForm = function() {

	var user = $('login_username');
	var pass = $('login_password');
	var message = '';
	if(user.value == 'Username') {
		user.focus();
		message += 'Please provide a valid username\n';
	}
	if(pass.value == 'Lightbox') {
		if(message == '') pass.focus();
		message += 'Please provide a valid password\n';
	}
	
	if(message != '') {
		alert(message);
		return false;
	}
	
	return true;
}