How can I make it like League of Legends' has their external warning set up?
Here is what I mean;
http://na.leagueoflegends.com/board/....php?t=2910177
if you go to that URL, you will see (3rd post) a link. click it and you will see the warning.
You post your link that is NOT on your board.
You click the link
You are leaving blahblah.com!
Press yes to continue, press no to go back
if they press yes, it brings them to the external url. if they press no, it brings them back to our forums (or the page before, whichever)
what is the simplest way to do this? Is there a mod for this?