Web design is a process of conceptualization, planning, modeling, and execution of electronic media content delivery via Internet in the form of technologies which suitable for interpretation and display by a web browser or other web-based. The goal of web design is to create a web site that presents content to the end user in the form of web pages. Such elements as text, forms, and bit-mapped images those can be placed on the page by using HTML, XHTML, or XML tags. Plug-ins is also embedded into web pages by using HTML or XHTML tags because some kind of complex media displaying is needed. (E.g. Flash, QuickTime, Java run-time environment, etc.)
Typically web pages are classified as static or dynamic.

1. Static pages don’t change content and layout with every request unless a manually updates the page.
2. Dynamic pages adapt their content and/or appearance depending on the end-user’s input or interaction or changes in the computing environment The content can be changed on the client side (end-user’s computer) by using client-side scripting languages (JavaScript, JScript, Action script, media players and PDF reader plug-ins, etc.) to alter DOM elements (DHTML). Dynamic content is often compiled on the server utilizing server-side scripting languages (PHP, ASP, Perl, Cold fusion, JSP, Python, etc.). Both approaches are usually used in complex applications.
With growing specialization within communication design and information technology fields, there is a strong tendency to draw a clear line between web design specifically for web pages and web development for the overall logistics of all web-based services.

Original Source

http://en.wikipedia.org/wiki/Web_design

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