Webmaster in a Nutshell, Second Edition

Name

Function — a JavaScript function

Availability

Core JavaScript 1.0; enhanced in JavaScript 1.1 and 1.2

Synopsis

// Function definition statement
function functionname(argument_name_list)
{
   body
}
// Unnamed function literal; JavaScript 1.2
function (argument_name_list ) { body}
// Function invocation
functionname(argument _value_list)

Constructor

// JavaScript 1.1 and later
new Function(argument_names, 
                     body)

Properties

arguments[]

Arguments passed to a function. JavaScript 1.0; ECMA-262; deprecated in favor of the Arguments object.

arity

The number of declared arguments. Navigator 4, with LANGUAGE="JavaScript1.2".

caller

The function that called this one.

length

The number of declared arguments. JavaScript 1.1; ECMA-262.

prototype

The prototype for a class of objects. JavaScript 1.1.

Methods

apply(thisobj, args)

Invoke a function as a method of an object. Navigator 4.

toString()

Convert a function to a string. JavaScript 1.0; ECMA-262.