I wrote a tutorial “Call Javascript Functions From Flash and Flex” about how flash calls javascript function. I think it is necessary to write another tutorial about how the javascript function calls actionscript function inside flash. See the example below:
Today, I try to call a Javascript function from flash, and it take me a long time to write the actionscript code to solve it. I think it’s necessary to post it online to help other peoples. In this tutorial, I just put a flash button in stage, and then call the javascript function when user clicks this button. If you want to call javascript function from flex, u can use the actionscript code in the same way.