MovieClip.prototype.alpha = function(vel, to) {
	this.vel = vel;
	this.to = to;
	this.alpha_init = this._alpha;
	this.onEnterFrame = function() {
		//updateAfterEvent();
		if (this.to != undefined && this.vel != undefined) {
			if (this.to>this.alpha_init) {
				if (this._alpha<=this.to) {
					this._alpha += this.vel;
				} else {
					this.onEnterFrame = null;
				}
			} else {
				if (this._alpha>=this.to) {
					this._alpha -= this.vel;
				} else {
					this.onEnterFrame = null;
				}
			}
		} else {
		}
	};
};