Here’s a piece of code that should really be unnecessary when you put the favico.ico into the root of your website directory:

<link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" />

The favico.ico should automatically appear there and in your browser bookmarks (favourites in IE) but there are occasions when the above has to sit in the header section of your web pages. I know because I am doing it for this blog.