Indexes are an excellent way to get organized in terms of the page creator.
Apparently Dr. James has already taken this idea into consideration. Now in G7, the entire web site seems to have an index for every topic. The only problem now, seems to be the multitude of these indexes. There are so many, that it's confusing to remember which index is for what topic. How this does this is it designates specific coordinates to each little area on the image as a URL and when clicked, it takes that information, processes it, and does the appropriate page change.