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Chapter 9

Properties

This section list new and revised properties for:

Anchor and Link Property

text

Client-side property. This property contains the content of the corresonding <A> tag.

Syntax

 
linkName.text

Parameters

linkName is the name of a link or a named anchor.

Property of

Anchor and Link objects

Function Property

arity

Core property. When the LANGUAGE attribute of the SCRIPT tag is "JavaScript1.2", this property indicates the number of arguments expected by a function.

Syntax

 
functionName.arity

Parameters

functionName is the name of a function.

Property of

Function object

Description

arity is external to the function, and indicates how many arguments the function expects. By contrast, arguments.length provides the number of arguments actually passed to the function.

Example

The following example demonstrates the use of arity.

 
<SCRIPT LANGUAGE="JavaScript1.2">
 
function addNumbers(x,y){ 
  document.write("length = " + arguments.length + "<BR>") 
  z = x + y 
} 
 
document.write("arity = " + addNumbers.arity + "<BR>") 
 
addNumbers(3,4,5)
 
</SCRIPT>

This writes:

arity = 2
length = 3

navigator Properties

language

Client-side property. Indicates the translation of the Navigator being used.

Syntax

 
navigator.language

Property of

navigator object

Description

The language property has been added for use with the JAR Manager.

The value for language is usually a two-letter code, such as "en" and occasionally a five-character code to indicate a language sub-type, such as "zh_CN".

Webpage authors would use this property when they need to determine the language of the Navigator client software being used. For example the scripter could display translated text for the user.

language is a read-only property.

platform

Client-side property. Indicates the machine type for which the Navigator was compiled.

Syntax

 
navigator.platform

Property of

navigator object

Description

The platform property has been added for use with the JAR Manager.

The machine type the Navigator was compiled for may differ from the actual machine type due to version differences, emulators, or other reasons.

Webpage authors would use this property to ensure that their triggers download the appropriate JAR files. The triggering page checks the Navigator version before checking the platform property.

JAR-install writers would use this property to double-check that their package is being installed on an appropriate machine, or for small JAR's to decide which of several machine-specific files to install.

Platform values are Win32, Win16, Mac68k, MacPPC and various Unix.

platform is a read-only property.

window Properties

innerHeight

Client-side property. Specifies the vertical dimension, in pixels, of the window's content area.

Syntax

 
[windowReference.]innerWidth

Parameters

windowReference is either the name of a window object or one of the synonyms top or parent.

Property of

window object

Description

To create a window smaller than 100 x 100 pixels, set this property in a signed script.

innerWidth

Client-side property. Specifies the horizontal dimension, in pixels, of the window's content area.

Syntax

 
[windowReference.]innerWidth

Parameters

windowReference is either the name of a window object or one of the synonyms top or parent.

Property of

window object

Description

To create a window smaller than 100 x 100 pixels, set this property in a signed script.

height

Replaced by innerHeight; height remains only for backward compatibility.

Syntax

 
[windowReference.]height

Parameters

windowReference is either the name of a window object or one of the synonyms top or parent.

Property of

window object

Description

In earlier releases, if you set this property to a number smaller than 100, JavaScript rounded it up to 100. In 4.0, it does a security check to see if the script can set the property to a number smaller than 100.

width

Replaced by innerWidth; width remains only for backward compatibility.

Syntax

 
[windowReference.]width

Parameters

windowReference is either the name of a window object or one of the synonyms top or parent.

Property of

window object

Description

In earlier releases, if you set this property to a number smaller than 100, JavaScript rounded it up to 100. In 4.0, it does a security check to see if the script can set the property to a number smaller than 100.

locationbar

Client-side object and a property of the window object. Represents the Navigator window's location bar.

Syntax

 
[windowReference.]locationbar.visible

Parameters

windowReference is either the name of a window object or one of the synonyms top or parent.

Property of

window object

Description

The locationbar object itself has one Boolean property, visible, that allows you to hide or show the location bar of the specified window.

This property must be set in a signed script.

Example

The following example hides the location bar of myWindow. 

myWindow.locationbar.visible=false

menubar

Client-side object and a property of the window object. Represents the Navigator window's menu bar.

Syntax

 
[windowReference.]menubar.visible

Parameters

windowReference is either the name of a window object or one of the synonyms top or parent.

Property of

window object

Description

The menubar object itself has one Boolean property, visible, that allows you to hide or show the menu bar of the specified window.

This property must be set in a signed script.

Example

The following example hides the menu bar of myWindow. 

myWindow.menubar.visible=false

outerHeight

Client-side property. Specifies the vertical dimension, in pixels, of the window's outside boundary.

Syntax

 
[windowReference.]innerWidth

Parameters

windowReference is either the name of a window object or one of the synonyms top or parent.

Property of

window object

Description

To create a window smaller than 100 x 100 pixels, set this property in a signed script.

outerWidth

Client-side property. Specifies the horizontal dimension, in pixels, of the window's outside boundary.

Syntax

 
[windowReference.]innerWidth

Parameters

windowReference is either the name of a window object or one of the synonyms top or parent.

Property of

window object

Description

To create a window smaller than 100 x 100 pixels, set this property in a signed script.

pageXOffset

Client-side property. Provides the current x-position, in pixels, of a window's viewed page.

Syntax

 
windowReference.pageXOffset

Parameters

windowReference is either the name of a window object or one of the synonyms top or parent.

Property of

window object

Description

The pageXOffset property provides the current x-position of a page as it relates to the upper-left corner of the window's content area. This property is useful when you need to find the current location of the scrolled page before using scrollTo or scrollBy.

This is a read-only property.

Example

The following example returns the x-position of the viewed page. 

x = myWindow.pageXOffset

See Also

pageYOffset

pageYOffset

Client-side property. Provides the current y-position, in pixels, of a window's viewed page.

Syntax

 
windowReference.pageYOffset

Parameters

windowReference is either the name of a window object or one of the synonyms top or parent.

Property of

window object

Description

The pageYOffset property provides the current y-position of a page as it relates to the upper-left corner of the window's content area. This property is useful when you need to find the current location of the scrolled page before using scrollTo or scrollBy.

This is a read-only property.

Example

The following example returns the y-position of the viewed page. 

x = myWindow.pageYOffset

See Also

pageXOffset

personalbar

Client-side object and a property of the window object. Represents the Navigator window's personal bar (also called the directories bar).

Syntax

 
[windowReference.]personalbar.visible

Parameters

windowReference is either the name of a window object or one of the synonyms top or parent.

Property of

window object

Description

The personalbar object itself has one Boolean property, visible, that allows you to hide or show the personal bar of the specified window.

This property must be set in a signed script.

Example

The following example hides the personal bar of myWindow. 

myWindow.personalbar.visible=false

scrollbars

Client-side object and a property of the window object. Represents the Navigator window's scroll bars.

Syntax

 
[windowReference.]scrollbars.visible

Parameters

windowReference is either the name of a window object or one of the synonyms top or parent.

Property of

window object

Description

The scrollbars object itself has one Boolean property, visible, that allows you to hide or show the scroll bars of the specified window.

This property must be set in a signed script.

Example

The following example hides the scroll bars of myWindow. 

myWindow.scrollbars.visible=false

statusbar

Client-side object and a property of the window object. Represents the Navigator window's status bar.

Syntax

 
[windowReference.]statusbar.visible

Parameters

windowReference is either the name of a window object or one of the synonyms top or parent.

Property of

window object

Description

The statusbar object itself has one Boolean property, visible, that allows you to hide or show the status bar of the specified window.

This property must be set in a signed script.

Example

The following example hides the status bar of myWindow. 

myWindow.statusbar.visible=false

toolbar

Client-side object and a property of the window object. Represents the Navigator window's tool bar.

Syntax

 
[windowReference.]toolbar.visible

Parameters

windowReference is either the name of a window object or one of the synonyms top or parent.

Property of

window object

Description

The toolbar object itself has one Boolean property, visible, that allows you to hide or show the toolbar of the specified window.

This property must be set in a signed script.

Example

The following example hides the tool bar of myWindow. 

myWindow.toolbar.visible=false

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