How do I share a workbook accross the internet?
 

How do I share the workbook with multiple user accross an internet
connection? The CEO and CFO are going to be going to a location on the other
side of the US and will have access from the Laptops to the internet. I would
like to set up the work book for the company on a shared application accross
the internet. This way they could see the changes and make changes to the
workbook in real time or at least on a daily update. I have tried to see what
could be done with the workbook, it seems that a shared workbook can only be
done on the same network.