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| ==Introduction==
| | #REDIRECT [[Flash_Applets_Tutorial]] |
| The communication between the applet and the JavaScript code in the WeBWork page uses the class [http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/external/ExternalInterface.html <code>ExternalInterface</code>] ActionScript class. Using this class, the developer can define ''callbacks'' in the ActionScript code to be called by JavaScript, and also directly call JavaScript code from ActionScript.
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| In this page we do not discuss the details of the <code>ExternalInterface</code> class, but describe the methods that WeBWork expects to be made available by the applet. The details of how to implement these functions is show in the examples that follow.
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| ==Functions Expected by the Interface==
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