JScript

JScript is derived from the group of languages that includes C, C++, and Java. If you have ever worked with C or Java, the syntax of JScript will be familiar. JScript can be implemented in two ways, using either a server-side script or a client-side script. For considerations when selecting a scripting language, see Choosing a Scripting Language.

JScript Features

JScript is a high-performance scripting language designed to create active online content for the World Wide Web. JScript allows developers to link and automate a wide variety of objects in Web pages, including ActiveX® controls and Java programs. Microsoft Internet Explorer is designed to interpret JScript embedded within Web pages.

Other factors that might influence your decision to use JScript include:

• JScript provides dynamic execution. A very powerful feature of JScript is that it allows you to create and execute script or evaluate expressions dynamically from within your script. Briefly, your script can write script. This feature is handy when working with dynamic HTML (DHTML) because you can then dynamically manipulate the DHTML document model.
• JScript is object-oriented in that it uses a prototype-based object structure that allows you to define objects in script. You can extend both built-in and custom-built objects by adding methods and properties to the objects' prototypes.
• JScript provides strong string-manipulation functions.
• JScript provides Internet-friendly classes such as URL encoding, pattern matching, and functions like escape that encodes a URL string.

Note  Not all browsers recognize JScript. When the browser cannot be specified it is safer to use JavaScript. JavaScript is also the default script language of most browsers.