WISE Technical Support

About Java and JavaScript


Viewing PDF files

If you have trouble viewing an Exercise file or other document downloaded as a PDF (Portable Document File) file, you may need to download and install Adobe Reader to view it.

Refresh Webpage

If an applet does not behave or appear correctly, click the RELOAD/REFRESH button, usually signified by an arrow or arrows on your browser (or press F5 on your keyboard if you are using Internet Explorer).

Enable Java and JavaScript

If an applet is still not working or if a WISE webpage does not load properly after refreshing the webpage, it may be due to Java or JavaScript being disenabled on your web browser. If Java or JavaScript has been disabled, it needs to be re-enabled:

Microsoft IE (Version 4.x and up)

  1. Under the Tools menu, select Internet Options….
  2. Under the Advanced tab, scroll down to Java (Sun).
  3. Select Use JRE 1.6.x ... for <applet>.
  4. Under the Security tab, click Custom Level....
  5. Scroll down to Scripting.
  6. Select Enable for both Active scripting and Scripting of Java applets.
  7. Click OK and then click OK again.

Mozilla Firefox

  1. Under the Tools menu, choose Options….
  2. Click Web Features.
  3. Select Enable Java and Enable JavaScript.
  4. Click OK.

Google Chrome

  1. Java is enabled by default. However, Java developer Sun recommends installing Java prior to Chrome, but otherwise offers no support for Chrome. User is referred to the Chrome Help Center.

For more information on enabling Java on the above mentioned browsers or other browsers, consult Sun Microsystem's Java website. If neither refreshing the webpage nor enabling Java results in the webpage or applet being properly displayed, you may need to download and install the free Java Runtime Environment.

A useful website to detect Java on your browser is: http://www.javatester.org.

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Adobe Reader

Adobe Reader is a free software program used to view PDF (Portable Document Format) files. Most WISE Exercise pages are downloadable and viewable in this format.

Java Software

If enabling Java on your browser does not resolve problems accessing WISE applets, download and install the free Java software, Java Runtime Environment (JRE). Once you have downloaded and installed JRE, be sure that Java is enabled on your browser using the steps given in the Troubleshooting section.

Web Browser

If WISE web pages do not load, try upgrading to the latest versions of one of these web browsers. These software programs are free.

Microsoft Internet Explorer (IE) is available for free download, and comes installed on Windows machines.

Mozilla Firefox, an open-source web browser, is available for Windows, Mac OS X and Linux.

Chrome is Google's streamlined, open-source browser. It is available for Windows, Mac OS X, and Linux.

Safari is Apple's browser included with both Mac OS X and iOS. It is available for Windows as well.

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About Java and JavaScript

A Java Applet is an application designed to run within a web page. Applets can operate across different computer operating systems because they rely upon a Java Runtime Environment (JRE) implemented by a specific computer's web-browsing application.

Java Applets are secure and safe to use. One should always be wary of downloading applications from anonymous sources on the Internet because of the possibility of viruses. However, the Java language explicitly puts limits on the functionality of applets so as to prohibit malicious behavior. A Java applet cannot read or write from a user's computer without express permission from the user.

JavaScript is a language used to create dynamic webpage applications. Like Java, JavaScript does not allow a program to access the files or directories on a user's computer. Despite its name, JavaScript (originally called "LiveScript") originated independently of Java and may not always be compatible with every browser.

The WISE site implements Java applets and JavaScripting to allow real-time demonstrations of statistical concepts that are beneficial to the understanding of statistics. To use many features of this site, it is necessary to have a web browser that supports Java and JavaScript such as Microsoft Internet Explorer, Mozilla Firefox, or Google Chrome. Java and JavaScript must then be enabled on the browser.

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Contact: wise@cgu.edu

Last updated: April 2, 2012

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