QUOTE(Darin McGrew @ Nov 3 2009, 11:59 PM)

No, there is no way to use HTML to crop an image. Create another image that is a cropped version of the first, and use the cropped image instead.
I'm not sure this is strictly true. Put the image inside an iframe, with no scroll bars, the image positioned appropropriately, and I think you can display any desired crop of an image in an html document. (Two, if you count the iframe document as separate.)
(Of course I'm not suggesting this is a particularly sensible idea.)