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Server-Side vs. Client-Side HTML Scripts

For example, a PHP or ASP web page is actually a web page that contains server-side script. The scripting is run on the server and results in a web page which your browser downloads. An example of client-side scripting are the common JavaScript drop-down menus you see so often nowadays. The menu code is written in JavaScript and run inside your browser - providing an interactive menu.
Although this tutorial will not cover teach you how to write your own scripts, it is important that you understand these basic concepts which you will run into quite a lot.  The server-side script would take the incoming form data and do things like process a sale, initiate a search or send an email.