private function clickHandler(event:MouseEvent):void
{
myLabel.text="The " + event.type + " event was dispatched by " + event.target.id;
altLabel.text="Alt key pressed: " + event.altKey;
ctrlLabel.text="Ctrl key pressed: " + event.ctrlKey;
shiftLabel.text="Shift key pressed: " + event.shiftKey;
}