St St or knitted?

If someone gets a second will you please look at these pants and see if you can tell if they are just plain knitted (except for the ribbing at the top) or if they are done via st st?
http://www.llamajama.com/products/catalog.php?item=37&catid=3&ret=catalog.php%3Fcategory%3D3

Also is there somewhere I can look to learn how to do fabulous patterns like this?

Thanks ladies!

Those are done in stockinette stitch.