No idea about bumpbox but this simple tip should put you on the right track.
You will need two things to achieve your goal:
- embed your banner with allowScriptAccess set to true
- create a proxy object in the js side that will interact between your banner and the bumpbox script like this:
var proxy_object = {
do_something: function(params) {
// some code here to open bumpbox and display your other movie
}
};
Then from your banner you just call ExternalInterface.call('proxy_object.do_something', some_params_here, if_needed)
as needed.
you can always get some more help on how ExternalInterface works at the Adobe Flash help