You need a Java browser in order to view any of the following applets. Try both Internet Explorer and Netscape 3.0.
Some applets run under better under some browsers than others.
This is the bleeding edge after all. Use this test page to try out Java applets. Copy the directory containing the html file and the applet class files into your working directory before you begin to modify the html tags. Plot A function plotter. HTML file shows how to use JavaScript to change the function.