I can not get Java applets to run on my MAC

I am running OSX 10.9.1, Safari Mountain Lion 7.0.1 and have Java 7u51 and can not figure out how to get applets to run.  I am taking classes for work and they all use applets.  Any ideas how to enable applets?  Blogs have recommended using java preferences but I can't find that on my computer.

Rivasrraa,
since you’ve installed Java 7u51, you should have a Java pane in System Preferences. When you select it, a Java Control Panel window will appear. In the Security tab of that window, you might need to set your security level down to Medium and/or add the applet site to the Exception Site List to be able to run your applets.

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