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<DIV><SPAN class=162523017-21072006><FONT face="Comic Sans MS" color=#000080
size=2>You understand that watermarks do not need to be applied to the images
until you send them down the wire? This was what I meant about doing this on the
server side, I assume the PHP suggestion earlier today (I'm a dotnet coder) uses
a method where the watermark is overlaid on the original image as it is being
sent to the client. Your customer here doesn't need to do anything to his
graphics aside from providing you with his desired watermark image. So if he
visits the directory where his images are stored on the server and views them in
say MS Paint, they appear normal just as he created them. Also he is free to
easily add additional images. They are not modified as stored only when your
server code sends them out to the client browser.</FONT></SPAN></DIV>
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<DIV align=left><FONT color=#000080 size=2>John Warner</FONT></DIV>
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<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B>
javascript-bounces@LaTech.edu [mailto:javascript-bounces@LaTech.edu] <B>On
Behalf Of </B>Alan Easton<BR><B>Sent:</B> Friday, July 21, 2006 1:04
PM<BR><B>To:</B> javascript@LaTech.edu<BR><B>Subject:</B> Re: [Javascript]
Disable left mouse click and drag on images<BR><BR></FONT></DIV>
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<P>Hi Paul,</P>
<P>You are absolutely correct in what you are saying, I know it and the client
knows it. The measures you suggest are already in place, and the client
acknowledges the fact that you cannot stop a visitor taking your images.
Watermarks are really the way to go, which the client is implementing.</P>
<P>Alan...<BR><BR></P></DIV>
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<DIV></DIV>From: <I>Paul Novitski
<paul@juniperwebcraft.com></I><BR>Reply-To: <I>"\[JavaScript
List\]"
<javascript@LaTech.edu></I><BR>To: <I>javascript@LaTech.edu</I><BR>Subject: <I>Re:
[Javascript] Disable left mouse click and drag on
images</I><BR>Date: <I>Fri, 21 Jul 2006 09:58:28
-0700</I><BR>>At 01:58 AM 7/21/2006, Alan Easton wrote:<BR>>>Well,
I have a client who wants me to make it as difficult as <BR>>>possible
for any visitor trying to save their images.<BR>><BR>><BR>>I
realize you're merely asking about JavaScript techniques, but I
<BR>>can't resist the urge to comment more generally.<BR>><BR>>If
your client is really naive about web technology, you can <BR>>probably
write some code that will make them feel safer. I
<BR>>understand why it often feels necessary to do this in order to
<BR>>placate client fears, even when you know perfectly well it's
<BR>>tissue-paper armor.<BR>><BR>>However, if you allow your client
to feel safe and then someone <BR>>scrapes their work off their site,
their disappointment might well <BR>>express as anger toward you for
leaving loopholes in that tissue <BR>>armor. Some clients sue
if they feel they've been misled and ripped <BR>>off. You
might want to consider asking your client to sign a letter <BR>>stating
that they understand that the image-saving blocks you're <BR>>adding to
their site will not prevent a sophisticated user from <BR>>scraping the
images.<BR>><BR>>The click-blocking techniques you're contemplating
will discourage <BR>>only the most naive computer users. I
imagine these are not the <BR>>people your client really has to worry
about. Anyone serious about <BR>>taking images from a web page
can stroll around them. It's like <BR>>adding a reinforced
door to a room without walls.<BR>><BR>>As you know, if I can see an
image on the screen I can save it as a <BR>>screenshot; if an image
appears on a web page then it's already been <BR>>downloaded to my cache;
JavaScript is easy to turn off; the Firefox <BR>>web developer tool bar
gives me access to all images on the page, as <BR>>well as to the
JavaScript-generated page source; and so on.<BR>><BR>>My
recommendation is that your client watermark the images on their
<BR>>site -- which both displays a notice of ownership and effectively
<BR>>ruins the photos for unauthorized re-use -- and then ENCOURAGE
<BR>>people to save them, send them to friends, etc., in order to
<BR>>increase awareness of their work as much as
possible.<BR>><BR>>Good
luck,<BR>>Paul<BR></FONT></BLOCKQUOTE></DIV></BLOCKQUOTE></BODY></HTML>