Shockwave:
To run the exercise from a web browser, the Shockwave plugin must be installed. If you do not have the plugin, you can download it from Macromedia (for free). Note: If you are having trouble, the plug-in that shipped with your browser may be out of date. Goto the Macromedia page and install the latest version. (Keep in mind that there are a couple steps to the install process: download, then run the installer.)
