Creating an Image Map
You have seen how to make an image function as a hyperlink, but sometimes you might want different areas of the image to hyperlink to different locations. For example, suppose you have a map of the United States, and want users to be able to click on their state to view a page containing information specific to their location. To create such an effect, you must use an image map.
An image map is an overlay for a graphic that assigns hyperlinks to certain defined areas (hotspots) on the image. The hotspots can be rectangular, circular, or irregularly shaped (called a poly hotspot).
A rectangular hotspot’s position is defined by two points: its upper-left and lower-right corners. Each point is expressed as a pair of numbers that ...
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