Flash MX 2004.
document.close([bPromptToSaveChanges])
bPromptToSaveChanges A Boolean value that, when set to true, causes the method to prompt the user with a dialog box if there are unsaved changes in the document. If bPromptToSaveChanges is set to false, the user is not prompted to save any changed documents. The default value is true. This parameter is optional.
Nothing.
Method; closes the specified document.
The following example closes the current document and prompts the user with a dialog box to save changes:
fl.getDocumentDOM().close();
The following example closes the current document without saving changes:
fl.getDocumentDOM().close(false);