Chapter 12 449
Platform Specifics and Web Monitoring
Web-enablement Technologies
Figure 12-5. 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 used to provide user interface
functionality and is designed to run on the client computer. ActiveX
Controls are optimized software components that used to be called OLE
Controls.
External Software Components
ActiveX Controls
Host Application
Document Objects
HTML Controls
Scripting
Language
(VBScript,
JavaScript)
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