I have to (thirty)second the thoughts of others in that this provides
you no "protection" in that it only frustrates power users and barely
keeps "honest people honest".
I would like to go even further. There is a cost of trying to do such
things to a medium that was specifically designed to be open and free.
1: It may not work properly on all browsers. This may frustrate users
who get unexpected results, and rather than try to puzzle them out,
will simply go on to a different, simpler website.
2: Future changes in browsers may cause you increased maintenance. OS
upgrades may simply stop your protection, or worse, could make the
images being protected invisible or causing unexpected side-effects.
3: You are spending time right now doing something that may have no
more life than that of the next OS upgrade, and has no more security
than typing in a shell command.
Keep it simple. You can't really stop them. It doesn't take much
sophistication to do wget (http://www.gnu.org/software/wget) from a
shell and have all those unprotected images downloaded into a nice
You're probably better off paying a scanning service (such as
Digimarc) to find illegal use of your images on the web.
:::: Nothing will replace what we are burning up quickly now. Every
possible replacement has problems which have received little
publicity. -- Dr. Kenneth Watt ::::
:::: Jan Steinman http://www.VeggieVanGogh.com ::::
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