Viewing the source of a web page is a time honored tradition among web developers. When you see something cool, the first thing to do is look under the hood to see if we can figure out how to do that. But a lot of newcomers to web design don't realize that this isn't "cheating" or illegal or something. While downloading a website and replacing the content with your own is a violation of copyright, just looking at it is not a crime at all. And looking at the source of HTML and CSS pages that you admire is a great way to improve your own designs.