They do anything from telling you what day you were born to help you write you own HTML coding to play a trick on the user. This is a Javascript simulation of a random walk along a line. It allows the user to choose the number of experiments, the length of the walk, and the starting location. Then it proceeds to simulate a random walk the requested number of times. It computes the average length of the walks which a student can compare with the theoretical expected-value of the walk.
Documentation is provided on the page.
Javascript Guitar - Use javascript 1.1 to create chords and scales on a virtual guitar neck. All images are preloaded, so the chords are produced instantly. Find 36 different types of the A chord, complete with fingerings. Alpha VRML Plot - This interactive 3D function plotter uses JavaScript to create VRML representations of a given 2D function and displays it in a separate frame. Just a bit of 'Derive' on the Web.