15.3 Dynamic Websites

Although static websites fascinated the first web users in the 1990s, they were soon eclipsed by sites offering more dynamic content. Dynamic sites made it easy to update the site’s contents continuously and to provide a multimedia experience.

Modern servers construct web pages on demand, based on the visitor’s input. If the visitor clicks a particular link or fills out a form, the site constructs the page tailored to the user’s selections. Sophisticated sites even take a visitor’s earlier activities into account when they build a page.

Web forms provided the original mechanism for dynamic web output. HTML contains “form” tags that display buttons, text fields, menus, selection boxes, and so on. We construct a web form ...

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