Compass::compassOppositePosition PHP Method

    public static function compassOppositePosition($from)
    {
        $ret = '';
        if ($from == 'top') {
            $ret = 'bottom';
        } elseif ($from == 'bottom') {
            $ret = 'top';
        } elseif ($from == 'left') {
            $ret = 'right';
        } elseif ($from == 'right') {
            $ret = 'left';
        } elseif ($from == 'center') {
            $ret = 'center';
        }
        return $ret;
    }