ExternalInterface.call在IE中导致错误

I have a menu screen that for various reasons consists of a number of buttons as separate flash movies. When a button inside these movies is clicked, it is supposed to call a javascript function to move to the appropriate page. It works fine in firefox, but is currently failing in IE7. I don't have an IE6 handy to test on. This is the error I get in IE:I have a menu screen that for various reasons c