Flash MX 2004.
document.canTestScene()
None.
A Boolean value: true if you can use the document.testScene() method successfully; false otherwise.
Method; determines whether you can use the document.testScene() method successfully.
The following example first tests whether fl.getDocumentDOM().testScene() can be used successfully. If so, it calls the method.
if(fl.getDocumentDOM().canTestScene()){
fl.getDocumentDOM().testScene();
}