A button state that occurs when the user clicks the button with the mouse.
An occurrence for which you can trigger ActionScript. User events include press and click; more automatic events are onLoad and onSoundComplete.
To move a file or an object from a Flash file. Often, the term is used to discuss the creation of distributable Flash files (.swf files).
A portion of ActionScript that can be evaluated but doesn't perform anything. For example, the expression clip._alpha>50 has the value true or false, but it doesn't do anything by itself.