Javascript to flash via ExternalInterface

Question

I'm wondering if someone could look over my code. I'm trying to pass a dummy variable from javascript to actionscript 3 with the following code:

HTML:
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" id="music_player" width="500" height="375" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab"> <param name="movie" value="music_player.swf" /> <param name="quality" value="high" /> <param name="bgcolor" value="#869ca7" /> <param name="allowScriptAccess" value="always" /> <embed src="music_player.swf" quality="high" bgcolor="#869ca7" width="500" height="375" name="music_player" align="middle" play="true" loop="false" quality="high" allowScriptAccess="always" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer"> </embed> </object>

Javascript:
var nextTrackLocation = "dummyString";
getFlashMovie("music_player").jsAlert(nextTrackLocation);

function getFlashMovie(movieName) {
  var isIE = navigator.appName.indexOf("Microsoft") != -1;
  return (isIE) ? window[movieName] : document[movieName];  }

and the actionscript:
ExternalInterface.addCallback("getNextTrack", jsAlert);

function jsAlert(mess){
ExternalInterface.call("alert", mess);
}

Does anyone see a mistake?

sorry, the first two lines of the javascript are within the function 'getNextTrack' — danwoods
– danwoods, Commented May 28, 2009 at 1:09

Luke · Accepted Answer · 2009-05-28 01:28:31Z

2

Your question is very confusing. I think you are making two mistakes here.

From Javascript you're trying to call a function in Actionscript called "jsAlert" but the function is in Actionscript exposed as "getNextTrack". I think it should be:

getFlashMovie("music_player").getNextTrack(nextTrackLocation);

Second, where you define the function in Actionscript you overlooked that the ExternalInterface.addCallback actually takes three parameters.

ExternalInterface.addCallback("getNextTrack", null, jsAlert);

edited May 28, 2009 at 1:28

answered May 28, 2009 at 1:18

Luke

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3 Comments

danwoods Over a year ago

Thanks for the reply!!! using 3 arguments with ExternalInterface.addCallback gives the following error: 1137: Incorrect number of arguments. Expected no more than 2.

danwoods Over a year ago

using 'ExternalInterface.addCallback("jsAlert", jsAlert);' fixed the problem. Thanks so much!!! the documentation says the second of the three arguments gives a point of reference. Could you elaborate on that at all?

Luke Over a year ago

Dan. Sorry about the parameter comment, you are right. I had AS2 in my head which needs three instead of two parameters. Glad it works now!

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