private static function MinifyCSS($sStr){
            $sStr = preg_replace('!/\*.*?\*/!s','', $sStr);
            $sStr = preg_replace('/\n\s*\n/',"\n", $sStr);
            $sStr = preg_replace('/[\n\r \t]/',' ', $sStr);
            $sStr = preg_replace('/ +/',' ', $sStr);
            $sStr = preg_replace('/ ?([,:;{}]) ?/','$1',$sStr);
            $sStr = preg_replace('/;}/','}',$sStr);
            return $sStr;
        }