public static function getIndex()
{
if (self::$index == null) {
if (!isset($_GET['index']) || $_GET['index'] < 0) {
$_GET['index'] = 0;
} else {
if ($_GET['index'] > self::getCountFontCollection() - 1) {
$_GET['index'] = self::getCountFontCollection() - 1;
}
}
self::$index = $_GET['index'];
}
return self::$index;
}
