Thus, site navigation must be clear of any topic, and friendly user. Menu items and the catalog should appear so that the user is no question as to move from one point to another site. In this regard, often it is useful to an element as a site map. A good habit is to duplicate the menu bottom of the page. Well-known rule for the navigation is a 'Rule 3 clicks'. The average site visitor clicks 3 times and if you can not find what he was looking for, leaving the site. Therefore, the nesting site of the structural elements such as menu and the directory should not be too big. 2.
Catalog. Catalog is also part of site navigation. It shall provide not less transparency display. Typically, catalog – it's not a list of products in the form of two-dimensional table, and woody structure hierarchy, with the ability to navigate through the product categories, subcategories (if any) on the list of goods. You can also get detailed information on specific positions, such as product description, its appearance (photo), its characteristics, price and more. From the catalog, you can choose the product and placing it in the shopping cart. Main requirement for the catalog – it's adherence to 'rule 3 clicks', but the list of goods must be foreseeable, without having to scroll the page down deep. You must also abide by the following simple rule: The user see the full path, which he passed, in a hierarchical menu by clicking the directory, for example, "Produkty'-> 'Molochnye'->' Syry'-> 'Russian Cheese'.
Selected product, category or subcategory is displayed in the page header tag. This is especially important for search engines, but would be beneficial for the visitor. If detailed information about a product called the pop-up window with JavScript, you must duplicate the link, a robot who does not know what is JavScript, too, could see this page.