问尝试从ExternalInterface调用JavaScript给出了不透明的TypeError

EN

import flash.external.*;
import flash.system.*;

// Params: First the function to call in JS, second the function run within AS
ExternalInterface.addCallback("test", sayHerro);

function sayHerro():String {
    return "HERRO OMFG";
}

<object height="640" id="myFlashMovie"> // note the id is myFlashMovie
    <param value="inbanner-mpu.swf" name="movie" />
    <param value="true" name="swLiveConnect" /> // Apparently I need this...
    <param value="always" name="allowScriptAccess" /> // and also this...

    // Note the src is the same as above (the animation does display), the name is the same, and this also has the allowscriptaccess tag
    <embed height="640" src="inbanner-mpu.swf" allowscriptaccess="always" type="application/x-shockwave-flash" name="myFlashMovie"></embed> 
</object>

<script type="text/javascript">
    $(window).on("load", function() {
        setTimeout(function() {
            var swf = document.getElementById("myFlashMovie");
            console.log(swf);
            swf.test();
        }, 500);
    });
</script>