VBScript Tutorial
VBScript is a scripting language.

VBScript was created by Microsoft to use either as a client-side scripting language for the Microsoft Internet Explorer (versions 3.0 and later) or as a server-side scripting language with the Microsoft Internet Information Server (versions 3.0 and later).

A primary advantage for using the server-side approach is that the VBScript is processed by the server before it is transmitted to the client.