Flash制作进度条是老问题了，这里提供给大家一段代码，帮你轻松制作进度条。
把下面的代码加到场景第一桢就OK了。
var myLoading:MovieClip;
var loadInfo:MovieClip;
var _lineBgcolor = "0x666666";
var _lineColor = "0x0000FF";
var _lineLen:Number = 200;
var _lineH:Number = 3;
var _txtColor; var _txtAlign:String = "center";
var tb:Number;
var txtFormat:TextFormat = new TextFormat
("Arial", null, 0x000000, true); myLoading = _root.createEmptyMovieClip("myLoading",10); //进度条
loadInfo = myLoading.createEmptyMovieClip("line", 10);
loadInfo.lineStyle(1, _lineColor, 20);
loadInfo.moveTo(0, 0);
loadInfo.lineTo(_lineLen, 0);
loadInfo.lineTo(_lineLen, _lineH);
loadInfo.lineTo(0, _lineH);
loadInfo.lineTo(0, 0); //进度显示文本
loadInfo.createTextField("txt", 30, 0, 0, _lineLen, 22);
loadInfo.txt.autoSize = _txtAlign; //设置进度条的位置（居中于主场景）
loadInfo._x = (Stage.width - _lineLen)/2;
loadInfo._y = Stage.height/2; //获得影片大小并stop，再onEnterFrame
tb = _root.getBytesTotal();
_root.stop();
myLoading.onEnterFrame = function(){
var lb:Number = _root.getBytesLoaded();
var percent:Number = Math.round(lb/tb*100);
loadInfo.txt.text = percent+"%";
loadInfo.txt.setTextFormat(txtFormat);
loadInfo.lineStyle(_lineH, _lineBgcolor, 10);
loadInfo.moveTo(0, _lineH/2);
loadInfo.lineTo(percent*_lineLen/100, _lineH/2);
if (percent == 100) {
_root.play();
delete this.onEnterFrame;
loadInfo.clear();
loadInfo.txt.text = "";
}
}
