CSiteCheckerTest::check_session

function check_session()
{
	if (!$this->arTestVars['last_value'])
	{
		$_SESSION['CHECKER_CHECK_SESSION'] = 'SUCCESS';
		$this->test_percent = 50;
		$this->arTestVars['last_value'] = 'Y';
	}
	else
	{
		if ($_SESSION['CHECKER_CHECK_SESSION'] != 'SUCCESS')
			return false;
		unset($_SESSION['CHECKER_CHECK_SESSION']);
	}
	return true;
}