class.tx_templatehook.php

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<?php

class tx_templatehook {
    function registerPngFix($params,$parent) {
            // handle stupid IE6
        $userAgent = t3lib_div::getIndpEnv('HTTP_USER_AGENT');

        if(!(strpos($userAgent, 'MSIE 6') === false)
        && strpos($userAgent, 'Opera') === false
        && strpos($userAgent, 'MSIE 7') === false) {
                //make sure we match IE6 but not Opera or IE7
            $files = t3lib_div::getFilesInDir(PATH_typo3 . 'sysext/t3skin/stylesheets/ie6', 'css', 0, 1);
            foreach($files as $fileName) {
                $params['pageRenderer']->addCssFile($parent->backPath . 'sysext/t3skin/stylesheets/ie6/' . $fileName);
            }

                // load files of spriteGenerator for ie6
            $files = t3lib_div::getFilesInDir(PATH_site . t3lib_SpriteManager::$tempPath . 'ie6/', 'css', 0, 1);
            foreach($files as $fileName) {
                $params['pageRenderer']->addCssFile($parent->backPath . '../' . t3lib_SpriteManager::$tempPath . 'ie6/' . $fileName);
            }

        }
    }
}

?>