actionscript相册小例子

this.stop();
btnCon(backBtn, 1);
backBtn.addEventListener("click",onPlay);
forwardBtn.addEventListener("click",onPlay);
function onPlay(e:MouseEvent) {
?if(e.target==backBtn)
?{
??this.prevFrame()
?}else if(e.target==forwardBtn)
?{
??this.nextFrame()
?}
?btnCon(backBtn, 1);
?btnCon(forwardBtn, this.totalFrames);
}
function btnCon(obj, frameNum)
{
?if (this.currentFrame == frameNum)
?{
??obj.alpha =.5
??obj.enabled = false;
?} else
?{
??obj.alpha =1
??obj.enabled = true;
?}
}