JavaScript Pocket Reference

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JavaScript Pocket Reference

JScript 5.0

Supported exception handling; partial ECMA v3 compli-

ance. Implemented by IE 5.

JScript 5.5

Roughly equivalent to JavaScript 1.5. Fully compliant

with ECMA v3. Implemented by IE 5.5 and IE 6.

ECMA v1

The first standard version of the language. Standardized

the basic features of JavaScript 1.1 and added a few new

features. Did not standardize the

switch statement or reg-

ular expression support. Conformant implementations

are JavaScript 1.3 and JScript 3.0.

ECMA v2

A maintenance release of the standard that included clar-

ifications but defined no new features.

ECMA v3

Standardized the

switch statement, regular expressions,

and exception handling. Conformant implementations

are JavaScript 1.5 and JScript 5.5.

Client-side JavaScript

Client-side JavaScript is the name given to JavaScript code

that is embedded within an HTML file and executed by a

web browser. In addition to the core objects described in the

previous section, client-side JavaScript code has access to a

number of other objects that represent the web browser, the

document displayed in the browser, and the contents of that

document. Client-side JavaScript programs are usually event-

based, which means that JavaScript event handlers are exe-

cuted in response to user interactions with the browser and

the document. The client-side JavaScript scripting frame-

work is powerful enough to open substantial security ...