Previous PageNext Page

7.18 Function Object

The Function object creates a new function.
 

Properties

arguments
 
An array containing each argument passed to the currently executing function.
 
caller
 
A reference to the function that invoked the current function
 
length
 
The number of arguments to the function.
 

Syntax 1

function functionname( [argname1 [, ... argnameN]] )

{

body

}

Syntax 2

var functionname = new Function( [argname1, [... argnameN,]] body );

Arguments

functionname
The name of the newly created function
argname1...argnameN
An optional list of arguments that the function accepts.
body
A string that contains the block of JScript code to be executed when the function is called.

Remarks

Syntax 1 is the standard way to create new functions in JScript. Syntax 2 is an alternative form used to create function objects explicitly.
 
The function is a basic data type in JScript. Syntax 1 creates a function value that JScript converts into a Function object when necessary. JScript converts Function objects created by Syntax 2 into function values at the time the function is called.
 
For example, if you want to create a function that adds the two arguments passed to it, you can do it in either of two ways:
 
Example 1
 

function add(x, y)

{

return x + y;

}

Example 2
 

var add = new Function("x", "y", "return x+y");

In either case, you call the function with a line of code similar to the following:
 

add(2, 3);


Copyright © 2000 Chili!Soft

Previous PageTop Of PageNext Page