Array of movieclips

How can I create an array of movieclips using for loop.

There’s a dozen of movieclips named image1,image2…
when I create an array like;

images = [image1,image2,....image20];

and call
images[0].onRelease = somefunction;

It works perfectly fine. But if I use for loop like;

var images = new Array(16);
	images* = "pict"+(i+1);

It gives me alot of undifined message;
Why dose this happen?