Take a look at this page please, its on my development server.
If its not available, sorry, my PC must be off.
Choose a development from the 3rd drop down on the left hand side, and you'll see some buttons appear just under the commercial property image in the right column. These buttons use AJAX to change the contents of the middle column. Most aren't wired up, but mortgage calculator is if you want to try.
Any ideas on how I can achieve this. All help really appreciated. Page will probably disappear about midnight GMT until some time tomorrow morning, my PC needs his sleep