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JavaScript is Netscape's cross-platform, object-based scripting language. This book explains everything you need to know to begin using core JavaScript.
This preface contains the following sections:
For a summary of JavaScript 1.4 features, see "New Features in this Release" on page 3. Information on these features has been incorporated in this manual.
This book assumes you have the following basic background:
Some programming experience with a language such as C or Visual Basic is useful, but not required.
Each version of Navigator supports a different version of JavaScript. To help you write scripts that are compatible with multiple versions of Navigator, this manual lists the JavaScript version in which each feature was implemented.
The following table lists the JavaScript version supported by different Netscape versions. Versions of Navigator prior to 2.0 do not support JavaScript.
Table 1 JavaScript and Navigator versions
Each version of the Netscape Enterprise Server also supports a different version of JavaScript. To help you write scripts that are compatible with multiple versions of the Enterprise Server, this manual uses an abbreviation to indicate the server version in which each feature was implemented.
Table 2 JavaScript and Netscape Enterprise Server versions
The core JavaScript documentation includes the following books:
If you are new to JavaScript, start with Chapter 1, "JavaScript Overview," then continue with the rest of the book. Once you have a firm grasp of the fundamentals, you can use the Core JavaScript Reference to get more details on individual objects and statements.
DevEdge, Netscape's online developer resource, contains information that can be useful when you're working with JavaScript. The following URLs are of particular interest:
JavaScript applications run on many operating systems; the information in this book applies to all versions. File and directory paths are given in Windows format (with backslashes separating directory names). For Unix versions, the directory paths are the same, except that you use slashes instead of backslashes to separate directories.
This book uses uniform resource locators (URLs) of the following form:
http://server.domain/path/file.html
In these URLs, server represents the name of the server on which you run your application, such as research1 or www; domain represents your Internet domain name, such as netscape.com or uiuc.edu; path represents the directory structure on the server; and file.html represents an individual file name. In general, items in italics in URLs are placeholders and items in normal monospace font are literals. If your server has Secure Sockets Layer (SSL) enabled, you would use https instead of http in the URL.
This book uses the following font conventions:
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Last Updated: 10/29/98 15:50:59
Copyright (c) 1998
Netscape Communications Corporation