I want to know how to do an image map for all of the unlinked portion...

ie everything that isn't explicitly already mapped out, can I have it by default link to another page, or do I need to map the entire thing?

for example

suppose I have a 500x500 pixel image, and

rect (0,0,25,25) points to page1.html and
rect (250,225,300,400) points to page2.html

how can I get everything else on that image to point to default.html
?

thanks in advance!

I think you're looking for something like:

<area shape="default" href="???">
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