image protection

L

luc

I have found some code that will prevent visitors to our website from right
clicking on our images to save them to there disk. But in windows xp this
code is useless because when you rollover an image, a little icon wil appear
making it possible to save, print out or even email it. Is there a way to
prevent this?
 
H

Hywel

I have found some code that will prevent visitors to our website from right
clicking on our images to save them to there disk.
Click to expand...

No, you haven't.

But in windows xp this
code is useless because when you rollover an image, a little icon wil appear
making it possible to save, print out or even email it. Is there a way to
prevent this?
Click to expand...

No.
 
K

Knud Gert Ellentoft

luc said:
I have found some code that will prevent visitors to our website from right
clicking on our images to save them to there disk.
Click to expand...

Why do you think, this will protect your pics from saving?
But in windows xp this
code is useless because when you rollover an image, a little icon wil appear
making it possible to save, print out or even email it. Is there a way to
prevent this?
Click to expand...

Nothing with javascript, in <head>, but still it won't protect
anything.

<META HTTP-EQUIV="imagetoolbar" CONTENT="no"">
 
I

Ivo

I have found some code that will prevent visitors to our website from right
clicking on our images to save them to there disk. But in windows xp this
code is useless because when you rollover an image, a little icon wil appear
making it possible to save, print out or even email it. Is there a way to
prevent this?
Click to expand...

There is a meta tag you can insert in the head of the page that will prevent
the 'icon' as you call it (I see four icons) in IE6 on windows xp and other
windows versions too. But it will not stop me from copying your images.
This code you found is useless. Disabling my right-click-menu will not
prevent me from dragging your image onto my desktop or straight into my
image editing program with my left mousebutton. It will only annoy (and
highly so) me and others who use the right-click-menu for other purposes
too. I can print-screen with and without javascript, or browse my cache to
retrieve any and all files separately. I can even take my camera and
photograph my computer monitor.
There is no solution against the copying of images. Certainly not a
javascript solution. Think of all your users who do not have javascript
enabled in the first place.
If you don't want something copied, don't put it on the internet.
Ivo
 
L

Lasse Reichstein Nielsen

luc said:
I have found some code that will prevent visitors to our website from right
clicking on our images to save them to there disk. But in windows xp this
code is useless because when you rollover an image, a little icon wil appear
making it possible to save, print out or even email it. Is there a way to
prevent this?
Click to expand...

Yes (and it's not WinXP, it's IE 6 that adds the image tool bar).

But before telling how, you should know that the code is inadequate in
so many other ways. Preventing right click is at best a nuisance, and
at worst a detractor for your page. It will not stop anybody with the
knowledge to use the image for anything, from getting it. It doesn't
prevent Save as: "Web page, complete". It doesn't prevent you from
finding the image in the cache. It doesn't prevent turning Javascript
off, which foils the scheme completely. It doesn't prevent asking
on a newsgroup, where more knowledgeable people can give several
other unpreventable methods. Here is a bookmarklet that foils most
schemes with one click:

<URL:javascript:(function(i,m){for(;i<m.length;i++){m.oncontextmenu=m.onclick=null;}}(0,document.images))>

(Don't try to read it, it's written for brevity, not readability. All
it does is to loop through all images and remove onclick and
oncontextmenu handlers)

In short: If you don't want the image to be saved, don't put it on a
web page. A watermark or copyright notice will do much more to detract
inappropriate use than any technical measure.


Anyway, for your question:
<URL:http://www.google.com/search?q=disable+image+tool+bar+&btnI=I'm+Feeling+Lucky>

I recommend using the META-method, as it is not invalid HTML.

If you really want to prevent right-clicking (or rather, the right
click menu), the simplest method is to add
oncontextmenu="return false;"
to the img tag:
<img src="..." oncontextmenu="return false;">
(It also has the advantage of not working in my browser, but neiter
does using the onclick handler)

/L
 
C

Chris Hope

luc said:
I have found some code that will prevent visitors to our website from
right clicking on our images to save them to there disk. But in windows xp
this code is useless because when you rollover an image, a little icon wil
appear making it possible to save, print out or even email it. Is there a
way to prevent this?
Click to expand...

You can never stop a determined visitor from downloading the image even if
you do disable right-clicking. For a start the image is already on their
computer for them to be able to view it, and secondly you can just disable
Javascript, reload the page and voila, you can right-click again.

Chris
 
G

Grant Wagner

luc said:
I have found some code that will prevent visitors to our website from right
clicking on our images to save them to there disk. But in windows xp this
code is useless because when you rollover an image, a little icon wil appear
making it possible to save, print out or even email it. Is there a way to
prevent this?
Click to expand...

In addition to everything everyone else has said, I want to point out that I can
get everything off your page without loading it into a "Web browser" at all. I
can harvest your entire site, and everything on it, using "wget". No need to
worry about whether images are in my browser cache, no need to worry about
defeating right-click blockers. A simple command and I will have every linked
document on your Web site.

<url: http://www.delorie.com/gnu/docs/wget/wget_31.html />

wget -r http://www.yoursite.com

Whoops! All your hard work annoying your users by disabling right mouse clicks
is pointless.

Once a resource is available for unrestricted read using the http protocol,
there is no way to "protect" it. Period. Full stop. EOF.

--
| Grant Wagner <[email protected]>

* Client-side Javascript and Netscape 4 DOM Reference available at:
*
http://devedge.netscape.com/library/manuals/2000/javascript/1.3/reference/frames.html

* Internet Explorer DOM Reference available at:
*
http://msdn.microsoft.com/workshop/author/dhtml/reference/dhtml_reference_entry.asp

* Netscape 6/7 DOM Reference available at:
* http://www.mozilla.org/docs/dom/domref/
* Tips for upgrading JavaScript for Netscape 7 / Mozilla
* http://www.mozilla.org/docs/web-developer/upgrade_2.html
 

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