I am looking for a way to create a hash for an image displayed on an XHTML page using Javascript.
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I am looking for a way to create a hash for an image displayed on an XHTML page using Javascript.
Yes, you can get it via XMLHttpRequest. Note that you would need to play various tricks see http://web.archive.org/web/20071103070418/mgran.blogspot.com/2006/08/downloading-binary-streams-with.html and How to force save as dialog box in firefox besides changing headers?) to get the file as a binary.