The example monitor-test.html (associated with MonitorTest.java) shows how to receive Events from a VRML scene. In this case the position (rotation_changed) of a rotating cube and the pulse (fraction_changed) from a Time Sensor. Needs probably cleaning up
The example monitor-test2.html (associated with MonitorTest2.java) adds a stop and a start button for the TimeSensor. It demonstrates basically the same thing as the RGB Test Applet.