MovieClip.prototype.fadeTo = function(out, to, vel) {
	if (to == null) {
		if (out) {
			to = 0;
		} else {
			to = 100;
		}
	}
	if (out) {
		this.onEnterFrame = function() {
			if (this._alpha>to) {
				this._alpha -= vel;
			} else {
				this.onEnterFrame = null;
			}
		};
	} else {
		this.onEnterFrame = function() {
			if (this._alpha<to) {
				this._alpha += vel;
			} else {
				this.onEnterFrame = null;
			}
		};
	}
};