they use the xmlhttprequest object to transfer data to and from the clients browser , on the php side they must have some way to communicate with a main script which handles and the connections.
http://www.google.com/url?sa=t&ct=res&cd=1&url=http%3A//developer.apple.com/internet/webcontent/xmlhttpreq.html&ei=1oUXRIeEB6KOowLMsoTzAQ&sig2=INM5FyIJimZKZrtQ5pGZ6g
quote:
Originally posted by Matty
They use php yes.
They are somewhat difficult to make if you don't know php or sockets.
who says they are using php? they could be using any server side script langauge.
/ 
![[Image: dt2.0v2.png]](http://thedt.net/img/dt2.0v2.png)
Happy Birthday, 
