Ubuntu Networking :: Automatic Logon To Internet Using Scripts?

I'm working in France right now. And my internet access is through a router on a local network (LAN) of the hotel in which I stay. In order to have internet access I must type in my room number, my name, check the agreement and then click Enter.The problem is that the router cuts off internet every two hours.What I need is some script that does the followings:

- detect if there is no more internet connection (the LAN connection stays on)

- if there isn't to run the script that does all those things above.

What I've managed to do is the script that puts room number, name, check the agreement and click Enter using DejaClick, making it a bookmark and then open the firefox and run the script.The command that I've used in Terminal and which I think I can use in my script was:

[URL]

It works well. It's connecting to the net.What remains is the detection of the cut off of the internet connection.
Tried with Wicd, going to the properties of the wireless connection and then on Script. here I'm stucked.Don't know what to do anymore.It has the post-disconnection script option, but my LAN connection is not disconnecting, only the Internet access through this LAN is disconnecting.