Dynamic Webpages
Dynamic Web pages adapt their content and/or appearance depending on end-user's input/interaction or changes in the computing environment (user, time, database modifications, etc.) Content can be changed on the client side (end-user's computer) by using client-side scripting languages (JavaScript, JScript, Actionscript, etc.) to alter DOM elements (DHTML). Dynamic content is often compiled on the server utilizing server-side scripting languages (Perl, PHP, ASP, JSP, ColdFusion, etc.). Both approaches are usually used in complex applications.
Most shopping carts use Perl, PHP, ASP, JSP to drive the contents of the pages. There is usally a database attached to the page which displays information based on user input.
For information about "static web pages" click here