However, Java or ActiveX graphs can be modified interactively during a browser session. For example, you can change the graph type from a bar chart to a pie chart, and then change the colors of the ...

First of all, JavaScript is not Java. It has nothing to do with Java (The language and its associated technologies from Sun Microsystems). To be honest, I'm not even sure why it's called JavaScript.

The Java update for Snow Leopard comes in at 81.9MB and can be downloaded via Software Update or Apple's Support Downloads webpage.