How to compare one region with another using Google Map

How to compare one area region with another using Google Map? Take for instance the territory of the Republic of Indonesia. Comparison of area of ​​Indonesia with other countries. How to compare the area of ​​Indonesia with other countries, through a Google Map, click the following link,

http://mapfrappe.com/index.html?show=5602

on a map of the second box (the bottom), slide it to the right, left, up or down to put an area of ​​Indonesia to the extent of the territory of other countries according to Google Map. You can also zoom the map by clicking on the slider on the left side in the second map box.