setTimeout and function do not work properly

[vcm11]

Am i doing something wrong here?

can i use the function in this way?

setTimeout (fadeIn(cinema_mc, 3), 1000);

function fadeIn(mc, speed) {
	mc.onEnterFrame = function(speed) {
		if (this._alpha>=100) {
			delete this.onEnterFrame;
		} else {
			this._alpha += speed;
		}
	};
}