You are welcomed to use our java applets for non-profit educational purpose. You will be able to get files related to any java applets at our web site if you are a registered user at http://www.phy.ntnu.edu.tw/ntnujava/ Just look for a button(with label: GET APPLET FILES) at the end of the first java applet message (You need to login to the forum). If you click the button, files related to that applet will be sent to your email account automatically. Fu-Kwun Hwang