Well, anda go to the part below were it says share page, x friends online and two lebih symbols. If there are friends online, anda click on their name(not exactly the name but when anda put your mouse there, it will get darker, then click there). When anda click there, another little window will appear and you'll have a little box where anda can write. There anda write and can chat!
I've copied the page I'm on now, and the part that's in a darker blue(were it says drgroz), is where I've put the mouse ;)