Difficulties in watching applets or CDFs of Atractor? 
If you are using Google Chrome or Mozilla Firefox:
These browsers no longer support Java and CDFs. Therefore, to view Atractor's applets or CDFs, use other browser, for instance, Internet Explorer for Windows and Safari for Mac OS X.
If you are using another browser and still have problems with the applets
Currently, many browsers are blocking Java, preventing the user of seeing applets. What to do?
- The first step is to install the latest version of Java and update your browser version.
- Then, on your computer, if you are using Windows, select the Control Panel; if you have a Mac, choose System Preferences.
