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Conventions Used in This Book

I use the following formatting conventions in this book:


Is occasionally used to refer to particular keys on a computer keyboard or to portions of a user interface, such as the Back button or the Options menu.


Is used for emphasis and to signify the first use of a term. Italic is also used for email addresses, web sites, FTP sites, file and directory names, and newsgroups. Finally, italic is used in this book for the names of Java classes, to help keep Java class names distinct from JavaScript names.

Constant width

Is used in all JavaScript code and HTML text listings, and generally for anything that you would type literally when programming.

Constant width italic

Is used for the names of function arguments, and generally as a placeholder to indicate an item that should be replaced with an actual value in your program.

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