The code creates a plot representing the trigonometric function z = cos(x) * cos(y). Click and drag
the above to rotate. Hold the shift key and drag to scale.
Tested in Chrome, Firefox, Opera, Safari and Internet Explorer 6. Works in IE via use of
Performs best in Safari and Chrome.
For implementation details and how to use it on your own web page,
Since VML renders very slowly in IE it is advised that the fillPolygons
option is set to false when the script is run in IE, especially when
there are a substantial number of points in the diagram.