myButtons.addEventListener("mouseDown", buttonF);
myButtons.addEventListener("mouseOver", buttonF);
myButtons.addEventListener("mouseOut", buttonF);
 
function buttonF(evt:Event):void {
     if (evt.type == "mouseDown") {
          switch (evt.target.name) {
               case "btn1":
                    myText.text = "Mouse down; button 1";
               break;
               case "btn2":
                    myText.text = "Mouse down; button 2";
               break;
               }
     } else if (evt.type == "mouseOver") {
          myText.text = "Mouse over; "+evt.target.name;
     }else if (evt.type == "mouseOut") {
          myText.text = "Mouse out; "+evt.target.name;
     }
}