Flash 8.
confirm ( strAlert )
strAlert A string that specifies the message you want to display in the Alert dialog box.
A Boolean value: true if the user clicks OK; false if the user clicks Cancel.
Method; displays a string in a modal Alert dialog box, along with OK and Cancel buttons.
Note: If there are no documents (FLA files) open, this method fails with an error condition.
The following example displays the message "Sort data?" in an Alert dialog box:
confirm("Sort data?");