You need to prevent visitors to your web site from downloading proprietary images displayed on your site.
Disable the right-click (and therefore Save Image) feature
Disable Internet Explorer's Image Toolbar
Place invisible layers over your images
Store images in a protected directory
The Internet has a love-hate relationship with stealing. Viewing the source code of a nifty-looking web page is by far the most popular method for learning about web design (after reading this book, of course). By borrowing a snippet of code from one site and adapting a bit from another, web designers have been advancing the state of their art for years—and few of their "victims" would consider what they're doing stealing. But then there's the whole Napster thing…
To be sure, the fruits of an artist or photographer's labors have more in common with music than HTML. Web page code—the structural part, not the content—is a commodity. There are only so many ways you can make a page look the way it does. If you find a new approach, you're almost obligated ...