Chapter 3. Implementing Common Elements

Within any given Web site, no single page is an island. By design, a site's pages often share a series of common elements: a header with a company logo, a navigation bar linking to primary site sections, and a copyright notice at the foot of the page are good examples. Mutual page elements and a shared layout enhance a site's usability and can prevent the user from having to figure out anew how to use each page.

Common Web page elements make sense from a maintenance perspective as well. Suppose that every page on a Web site includes the company logo as a GIF image and that all the src attributes point to a single file. Make any change to that image file, and the modification is instantly reflected on all ...

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