Traditionally, global navigation appears on every page of a website, and serves 2 functions:
Recently, some websites have begun putting global navigation categories in a drop-down menu . For example, WHSmith, a large British retailer, lists its product categories in a Shop by Department drop-down menu instead of a visible navigation bar.
The global navigation on WHSmith.co.uk includes a Shop by Department drop-down menu, but no visible listing of product categories.
Using a drop-down menu...