A server-side image map is one in which the server determines which document should be loaded, based on where the user clicked on the image. To make this determination, the server needs the following information:
The coordinates of the user's click— This information is passed to the server by the client program.
A program that takes the click coordinates as input and provides a URL as output— Most HTTP servers have a routine built in that handles this task.
Access to the information that defines the hot regions and their associated URLs— This information is critical to the processing program that checks the hot regions to see whether the user's click corresponds to a URL. When the program finds a match, it returns the URL ...