Spam Vaccine stops spam by 'vaccinating' email addresses that appear on Web pages. This prevents programs called 'spambots' from stealing your email address and sending you spam. Customers and friends see your email address, but the spambots see nothing. So you get less spam. Uses a combination of HTML, JavaScript and image files to baffle spambots. Although it uses JavaScript for maximum effect, Spam Vaccine is also compatible with non-JavaScript browsers.