Detect when user ctrl-N

PHP
1

I have a concurrent login checking (a flag) for my site, it works fine but if I do ctrl-N, i will be able to open two site without any problem. for eg, I login as user A and i’m in search page now. when i do ctrl-n, a new window will open and without login, I’m in the search page also.

How can I prevent that? How can I detect when user ctrl N and log them out automatically?

2

You could write your own browser, and then force everyone to use it somehow.

See this thread for more info http://www.sitepoint.com/forums/showthread.php?t=654646

3

oops, sorry, should have just used back my previous post. Thanks.