User`s guide

Platform Specifics and Web Monitoring Chapter 13
VEE User’s Guide 477
The scripting language is an interpreted language supported by
the browser. The scripting language can extend the limitations
of HTML to provide a more interactive Web page. Because they
are interpreted, scripting languages must be embedded into the
Web page and supported by the browser. They are not
independent programs. This is graphically illustrated in
Figure 270.
Figure 270 A Scripting Language Host Model
VBScript, JavaScript, and JScript are scripting languages.
VBScript is based on MS Visual Basic. JavaScript is co- created
by Sun (Java). JScript is based on Microsoft’s version of
JavaScript.
The scripting languages must reside inside a host application.
The host application is typically a web browser such as Internet
Explorer or Netscape Navigator. Within the browser, the overall
look and feel of the web page is controlled by HTML.
Microsoft’s Component Object Model (COM) defines compiled
software components called ActiveX Controls that encapsulate
specifically designed functions. Typically, an ActiveX Control is
External Software Components
ActiveX Controls
Host Application
Document Objects
HTML Controls
Scripting
Language
(VBScript,
JavaScript)