You can do something like a zoom with a html imagemap. This creates areas on the image which can be clicked. With a click it calls a Javascript function which calls another Quest function to load a new picture with a detailed view of the area.
With that imagemaps you can create real point&click adventures with Quest.
To test this, copy all appended files into a directory. Then rename test.aslx to test.js. So now you should be possible to load and start map.aslx. Use the map there!
By the way, who knows the town on the picture?