Mine

MovieClip.prototype.fade = function(fadeIn, speed, maxMinAlpha) {
 if (fadeIn == null) {
  fadeIn = true;
 }
 if (maxMinAlpha<1 || maxMinAlpha == null) {
  maxMinAlpha = 1;
 }
 if (speed == null) {
  speed = 1;
 }
 if (fadeIn) {
  this.posNeg = 1;
 } else {
  this.posNeg = -1;
 }
 this.fadeInOut = speed*this.posNeg;
 this._alpha -= this.fadeInOut;
 this.myAlpha = this._alpha;
 if (fadeIn) {
  if (this.myAlpha<maxMinAlpha) {
   this.makeFade = false;
  }
 } else {
  if (this.myAlpha>maxMinAlpha) {
   this.makeFade = false;
  }
 }
};
this.fade(true,1,150);
this.makeFade = true;
tester_mc.loadMovie("panaroma.swf");