Hiding elements from printing

The question comes up all the time: Can I prevent people from printing my web page or an image on the page?  The short answer is unfortunately "No".  You can make it difficult for them, but a determined visitor will still find ways.  So far nothing I'm aware of can prevent them altogether.  Basically, if you put it on the page, they can see it and find a way to print it.

Another way of looking at the same problem is removing elements of your page that don't need to be printed.  For instance, if somebody is reading an article on your site and wants to print it, they probably don't need the navigation, advertisements or a print button on the printed page.  They want to read the article, not look at the framework around it.