I have been working on allowing JavaScript in a browser to evaluate expressions in a MathPiper-based applet without a security exception being thrown and I have a version of the software that is ready to be tested. The following web page has a headless applet embedded in it which contains MathPiper. The page also contains a small JavaScript calculator GUI which can be used to enter MathPiper expressions. Note: the mathpiper.jar file that is being used here has not been stripped down for general applet use so it is abnormally large. I have been able to get this code to work with Sun's browser plugin on Windows, but it does not currently work with the open source IcedTea browser plugin for Linux. ***After selecting the following link, you must wait until the status bar at the bottom of the page reads "Applet started" before trying to enter any calculations.*** The calculator works like a normal calculator. If you want to evaluate MathPiper expressions, just type them into the Input text field then press the "Evaluate MathPiper Expression" button. Here is the web page: http://sage.ssu.portsmouth.oh.us/test/JSApplet.html Please let me know if it is able to evaluate various MathPiper expressions. If it doesn't work, please record that errors that were produced and post them to this email list. Thanks :-) Ted