Tool to invoke actions in Flash swf via JavaScript

Question

I have a flash swf file without access to it's source. Can I use only JavaScript to invoke/initiate the action of the flash functions within the swf file?

Or does the swf need active listeners to respond to JavaScript?

Answer 1

You cannot communicate with an SWF (at least an AVM2 (AS3 based) SWF) unless it has registered callback methods in it. The ExternalInterface class has an addCallback() method that:

Registers an ActionScript method as callable from the container. After a successful invocation of addCallBack(), the registered function in Flash Player can be called by JavaScript or ActiveX code in the container.