Virtlab depends heavily upon the nature of your browser. You must enable cookies and
We have tried hard to support as many browsers as possible and always test against the latest version
of Internet Explorer, Firefox, and Chrome. Tests with recent versions of Safari (both Macintosh and PC) have been
successful but Opera is not working (see below).
We used to recommend that Macintosh users download Firefox for the Macintosh, but are now satisfied that recent releases
of Safari will also perform satisfactory.
Visual simulations (the "Laboratory" tab) require a recent version of the Flash Player.
Model building (the "Models" tab) requires an electronic spreadsheet. We developed our models using
Microsoft Excel, but most spreadsheets
can accept and convert Excel files. Model building is a slightly more advanced part of Virtlab training. We hope you will
try it and enjoy it!
Browser Settings: All flavors of cookies (both RAM and disk-based) should be permitted by your browser.
Internet Explorer: Virtlab has been tested against Internet Explorer versions 6 - 8. We have encountered
Mozilla/Firefox: Virtlab has been tested successfully with Firefox versions 1.5 - 3.5.
Opera: Opera does not work in Virtlab. It will not display our Flash simulations in our "Course" pages.
Safari: Early versions of Safari had many problems when tested with Virtlab. The coordination between
the left- and right-hand scrollbars in the Instruction window were among the most serious. Recent versions of Safari
have no such problems.
Other Browsers: We have tried hard to use techniques and libraries that are compatible across many browsers. We do not
anticipate that you will find serious incompatibilities with modern browsers (Opera seems to be an unusual exception).
Please let us know of any unusual behavior that you encounter.
Virtlab Flash simulations were developed using Flash 8 and Actionscript 2.0. It is available for virtually all browsers and
is often a default presence in modern browsers. The most recent version of the Flash player is free and is available at
The electronic spreadsheet was once defined by Alan Kaye as a
"tissue-like superobject". It is an extraordinarily friendly way of performing "what-if" calculations
and it offers you the opportunity to design and explore your own simulations and "thought experiments" in Virtlab.
There are many guided exercises of this sort in the "Models" tab of Virtlab.
While Microsoft Excel was used to develop the models used in Virtlab you should be able to find
other spreadsheet software that supports the Excel file format (use your favorite search engine and
look for "spreadsheet software").
You are always welcome to contact us with comments and questions. The email address for Virtlab's editor is