public function IsSelected($sItemName)
    {
        $bIsSelected = false;
        if (is_array($this->aActiveFilterData)) {
            $bIsSelected = in_array($sItemName, $this->aActiveFilterData);
        } elseif (!empty($this->aActiveFilterData) && is_string($this->aActiveFilterData)) {
            $bIsSelected = ($sItemName == $this->aActiveFilterData);
        }

        return $bIsSelected;
    }