Indicating when clickable image link on a hypertext image map of a computer web browser has been traversed

摘要

The invention is a method to mark hypertext links in an image map that have been traversed. The invention actually modifies the image map of the links by inserting a marker or changing the color associated with the coordinates of a particular image link on the image map. The history files of links that have been traversed are first checked to determine if the image has changed or is otherwise out of date. The image map or a copy of the image map is then modified and displayed.