What is the trick for getting active URIs on profile pages? Examples: * active: http://news.ycombinator.com/user?id=mqt http://news.ycombinator.com/user?id=mq

What is the trick for getting active URIs on profile pages? Examples: * active: http://news.ycombinator.com/user?id=mqt http://news.ycombinator.com/user?id=mqt * inactive: http://news.ycombinator.com/user?id=iamelgringo http://news.ycombinator.com/user?id=iamelgringo