"VBScript (Visual Basic Scripting Edition), a subset of the Microsoft Visual Basic programming language,
is a fast, portable, lightweight interpreter for use in World Wide Web browsers and other applications
that use Microsoft ActiveX Controls, Automation servers, and Java applets. ...
VBScript is designed to be a small and lightweight interpreted language,
so it does not use strict types (only Variants). Also, because VBScript is intended to be a safe subset of the language,
it does not include file I/O or direct access to the underlying operating system.
When used in Microsoft Internet Explorer, VBScript is directly comparable to Microsoft JavaScript (not Java).
Like JavaScript, VBScript is a pure interpreter that processes source code embedded directly in the HTML.
VBScript code, like JavaScript, does not produce standalone applets but is used to add intelligence and interactivity to HTML documents." (Microsoft)