Question

how i can communicate with my flash app ? i load in my extension flash
some like this

myDiv.innerHTML = <object…><param allowScriptAsses… etc … 
flash load fine !!! now, i trace my externalInterface method 
var flashObject = document.get…("myFlash")
alert(flashObject) <- okey - [embedHtmlObject … 
alert(flashObject.myExternalMethod) <- native function its okey !!! 
try excute 
flashObject.myExternalMethod() and NOTHING !!! ((( externalMEthod not invoked !!! this problem ONLY on windows 7 in fireFox ! 

on mac os and firefox i use wrapedObject and externalInterface work fine ! but if i try use wrapedObject on windows system – i have error (((

HOW i can use ExternalInterface on windows in firefox correctly ?

Answer 1

First you need to add a callback to your ActionScript code:

flash.external.ExternalInterface.addCallback("myExternalMethod", doSomething);

function doSomething():void
{
//your code
}

If you are using swfObject to embed your flash movie you can use swfobject.getObjectById to detect your swf and call your methods.

swfobject.getObjectById("myFlash").myExternalMethod();

If you are not using swfObject just copy and past the getObjectById method on your JS code:

function getObjectById(objectIdStr) {
        var r = null;
        var o = getElementById(objectIdStr);
        if (o && o.nodeName == "OBJECT") {
            if (typeof o.SetVariable != UNDEF) {
                r = o;
            }
            else {
                var n = o.getElementsByTagName(OBJECT)[0];
                if (n) {
                    r = n;
                }
            }
        }
        return r;
    }

And call it by doing:

getObjectById("myFlash").myExternalMethod();

Have a look on this, I actually code a small example on my blog: http://www.nelsond8.com/?p=515