效果是仿别人，但代码绝对是自己的！
http://www.flash8.net/bbs/UploadFile/2005-7/2005729181856767.swf
txt_mc._visible = false;
var banner:String = "welcome to www.lh8.wapjh.com";
function effect(target:MovieClip, banner:String, nn:Number) {
var num = banner.length;
for (var i = 0; i<num; i++) {
duplicateMovieClip(target, "mc"+i, i);
new_mc = this["mc"+i];
new_mc._visible = false;
new_mc._x = target._x+i*10;
do {
new_mc.txt_num = banner.charCodeAt(i);
new_mc.num_num = 48+random(74);
} while (new_mc.txt_num == new_mc.num_num);
new_mc.n_num = new_mc.txt_num>new_mc.num_num ? +1 : -1;
new_mc.i = i;
new_mc.n = 0;
new_mc.t = getTimer();
new_mc.onEnterFrame = function() {
this.t_mc._visible = false;
if (getTimer()>this.i*nn+this.t) {
this._visible = true;
this.num_num += this.n_num;
this.txt.text = chr(this.num_num);
if (this.txt_num == this.num_num) {
delete this.onEnterFrame;
}
this.n++;
duplicateMovieClip(this.t_mc, "txt"+this.n+this.i*1000, this.i*1000-this.n);
n_mc = this["txt"+this.n+this.i*1000];
n_mc.num_num = this.num_num;
n_mc.txt.text = chr(this.num_num);
n_mc.onEnterFrame = function() {
this._alpha -= 7;
this._xscale = this._yscale += 10;
if (this._alpha<5) {
removeMovieClip(this);
}
};
}
};
}
}
effect(txt_mc, banner, 100);
