<!--#if expr="$HTTP_COOKIE = /lang\%22\%3A\%22([a-zA-Z]+\-[a-zA-Z]+)\%22\%7D;?/" -->
Regular expression matched!
<!--#else -->
Nope, it failed.
<!--#endif -->
<!--#if expr="$HTTP_COOKIE = /lang\%22\%3A\%22([a-zA-Z]+\-[a-zA-Z]+)\%22\%7D;?/" -->
Regular expression matched!
<!--#else -->
Nope, it failed.
<!--#endif -->