A Boolean flag to indicate whether the area is a link or a dead spot within the map.
|DOM level - 1|
|JScript - 3.0|
|Internet Explorer - 4.0|
|Netscape - 6.0|
|Property/method value type:||Boolean primitive|
When a shaped area is defined within a an image map, it can either define a live hotspot or a hole that has been cut out in the map. In this way, both concave and convex shapes can be created. You can also create shapes with holes in the middle.