Hi there,
Ill get right to the point, my problem is this:
I wanted a CSS extension to change a image on a certain website into another image i have stored on my harddisk. Problem is that i dont have acces to the website page itself (cant edit it). I read some tutorials and stuff and came up with the following:
img[src="http://www.somewebsite.com/Themes/classic/images/on.gif"] {src: "c:\bla.bmp";}
Sadly, that doesn't work at all.
Thanks alot for reading this and thanks even more if you can tell me what i am doing wrong.

Im not native english so sorry for any grammar errors.

Yeah, that's not really what CSS does.

In opera I'm not sure what else to tell you. In firefox you could install Greasemonkey and write yourself a user script (JS) that would do it for you.

Oh :(

The way i see it images are an important part of styling a website! Imagine buttons that would not look good with the text- and background color you defined in your CSS. (i have to admit it would be useless to specify another image in your CSS since you'd still have to actually create that image with paint shop pro or paint.)

Let me explain the way i want to use CSS. Opera comes with a few pre-defined CSS files. One of them is really simple and i used to gain more knowledge about CSS at first. This is how it originally looks:
@charset "UTF-8";
/*
Name: Hide non-linking images
Version: 1.01
Author: Opera Software ASA
Description: This style sheet hides images that do not serve a navigation purpose.

Copyright © 2003 Opera Software ASA.
*/
img {display: none !important;}

a img {display: inline !important;}

It works fine and the code is pretty self explaining. So now i thougt "if it can block certain images and others not, i could modify this code to CHANGE a certain image in another one."
This may not be the way CSS is intended to be used, but if possible it is exactly what i need. I know it's used by webmasters to style an entire website without changing every html file.

Some resource i used:
http://www.yourhtmlsource.com/stylesheets/csslinks.html
(the last part called 'Image Links' seems interesting if you say "it isnt possible")

Any thoughts?

I will look into that greasemonkey link later, thanks for posting it. Yet my first objective remains to solve this problem using CSS.
(I also dont know how to write a js, but as said, its not my main concern at this point)

I'm not positive what this guy is trying to do, but it seems like he might want to change the browser default style sheet?

The problem is solved (with an user javascript). I modificated this js. The final outcome is this:
------------------------------------------------------------------------------
// ==UserScript==
// @include www.thewebsiteitisusedfor.com />// ==/UserScript==

(function ()
{
var objects = document.getElementsByTagName("img");

if(objects.length > 0)
{
for(i=0;i<objects.length;i++)
{
var alt = objects.getAttribute('src');
var ImgParentNode = objects.parentNode;
if(alt == "http://www.url.to/the/image/you/wish/to/change.gif")
{
objects.src = "http://www.url.to/the/image/you/wish/to/change/it/into.gif"
}
else
{
continue;
}
}
}
})();
------------------------------------------------------------------------------
Althrough this is not css i still wanted to share my solution. Thanks for the help.