Clarence wrote: >The top left you refer to is SCREEN top left, not polygon ? Neither. It's the image top left. The image may be anywhere onscreen, or a yard and a half below your desk top. The image file is referenced, as with inserting any other image, but is given the USEMAP attribute to tell the browser to relate user-inputs to the coords held in the MAP. >Since the co-ords appear to be absolute, you can pick ANY random vertex >as the starting point yes/no ? Yep. >And now a question: Does it matter in which direction you proceed ? I've always taken it to be clockwise, but I've uploaded an image map with all the coords for you to play with. See: http://www.wymondhamleics.freeserve.co.uk/test/star-map.htm >I can image a rule system where listing vertices in clockwise order for >say, a 5 pointed star, would produce the star, and listing in the other >direction would produce a HOLE for a star. Netscape is apparently the only browser that acknowledges SHAPE=default, being all the areas outside of the defined hotspots (but bounded by the image). The first AREAs listed take precedence for any hotspot overlaps, so if you try SHAPE=default it should be at the end of the list. NOHREF lets you define an AREA for which no action is taken (I can only think this would be enclosed by a hotspot). Explorer has TABORDER for the rodentless (now TABINDEX in HTML4.0) but not supported by any browser AKAIK. Most simple image map navbars have been replaced by images in table cells, to allow ALT texts to make them functional to those with images "off"; and image maps are generally a technique to avoid, or to back up with alternative schemes. Regards, Jake
