"Java" is a widely-used type of PC software provided by Sun Microsystems. This nonprofit site uses Java scripts to launch informational popup windows to help you learn. It looks like your browser isn't Java-enabled or suppresses popups. Most browsers allow you to enable Java support and/or allow some or all popups.

To enable Java In the Internet Explorer browser, click "Tools," in the browser toolbar > "Internet Options," > "Secur-ity," and "Custom Level." Scroll down to "Java VM" and click the desired security level button. Then click "OK"

To regulate popups, click "Tools" > "popup blocker"

To download and install the latest free Java "Runtime Environ-ment" software, visit http://java.com and follow the directions.

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