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Chapter 3. Language Essentials > Detecting Browser Plug-ins

Detecting Browser Plug-ins

(Netscape and Internet Explorer/Mac)

Browser plug-ins provide the Web page author with lots of great options for including rich media content, such as sounds, video, and animation. The problem plug-ins pose is that you can't be sure if the user has the plug-ins installed that you require. JavaScript can help you find out which plug-ins the user has installed, and if they don't have what's needed, you can send them to a page where they can get the required plug-in. Script 3.1 tests for the presence of the Macromedia Flash plug-in, one of the most common plug-ins.


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