For viewing the simulations of this site, you need JAVA. If your browser does not yet understand Java, you can get a free download by clicking on the icon on the left.
Please make sure that JAVA is activated on your browser. In the Microsoft browser p. ex., you must click: First "Tools" in the menue bar, then "Internet options", then on the flag "Advanced". In the menu then turning up, you must activate the case under "Java (Sun)" (next to the Java icon): Use Java2v1.4.1 for <applet>. (New start required)".

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