JavaScript (In)Compatibility

Version 9708

There are many incompatibilities among the various implementations of JavaScript. This applies both to differences between Netscape and Microsoft implementations and among the various implementations by each of these companies. With the mix of browsers in use, these differences must be attended to or scripts may not work for a significant portion of the Web users. My general advice is to always check your scripts with the two worst-case browsers: Netscape Navigator 2 and Microsoft Internet Explorer 3. For really critical pages (like a corporate home page), check your scripts with as many browsers as you can.

In the material below, superscripts indicate what version the feature was first implemented in. Red subscripts indicate which versions have known problems with the feature. NS stands for Netscape and IE stands for Microsoft Internet Explorer.

If you have questions or comments, join into the discussion in the Site Development section of our Net Commerce Community.

script ^NS2_NS2

<script>
NS2: Cannot appear in the body, only the head, in NS2

JavaScript ^NS2

<script language="JavaScript">
Runs script only if browser supports language version.

JavaScript1.1 ^NS3_{NS2 IE3}

<script language="JavaScript1.1">
Runs script only if browser supports language version.

JavaScript1.2 ^NS4_{NS2 NS3 IE3}

<script language="JavaScript1.2">
Runs script only if browser supports language version.

JScript1.1 ^IE4_{NS2 NS3 NS4 IE3}

<script language="JScript1.1">
Runs script only if browser supports language version.
IE3: Version of JScript implemented on IE3 but IE3 does not recognize attribute.

JScript1.2 ^IE4_{NS2 NS3 NS4 IE3}

<script language="JScript1.2">
Runs script only if browser supports language version.

abs ^NS2

Math.abs(number)
Returns the absolute value of a number.

acos ^NS2

Math.acos(number)
Returns the arc cosine (in radians) of a number.

action ^NS2

formName.action
A string specifying a destination URL for form data that is submitted.

alert ^NS2

alert("message")
Displays an Alert dialog box with a message and an OK button.

alinkColor ^NS2

document.alinkColor
A string specifying the color of an active link (after mouse-button down, but before mouse-button up).

anchor method ^NS2

text.anchor(nameAttribute)
Creates an HTML anchor that is used as a hypertext target.

Anchor object ^NS2

A place in a document that is the target of a hypertext link.

anchors

An array of objects corresponding to named anchors in source order. See the Anchor object for information.

appCodeName ^NS2

navigator.appCodeName
A string specifying the code name of the browser.

Applet ^NS3_{IE3 NS2}

To use an applet object:document.applets[index]
Includes a Java applet in a web page.

applets

An array reflecting all the applets in a document in source order. See the Applet object for information.

appName ^NS2

navigator.appName
A string specifying the name of the browser.

appVersion ^NS2

navigator.appVersion
A string specifying version information for the Navigator.

Area

Defines an area of an image as an image map. When the user clicks the area, the area's hypertext reference is loaded into its target window. Area objects are a type of Link object. For information on Area objects, see Link object.

arguments array ^NS2

To use the arguments array:1. functionName.arguments[index]2. functionName.arguments.length
An array corresponding to elements of a function.

arguments property

An array of elements in a function. See the arguments array for information.

Array ^NS3_{IE3 NS2}

To create an Array object:1. arrayObjectName = new Array([arrayLength])2. arrayObjectName = new Array([element0, element1, ..., elementn])To use Array objects:1. arrayObjectName.propertyName2. arrayObjectName.methodName(parameters)
Lets you create arrays and work with them.

asin ^NS2

Math.asin(number)
Returns the arc sine (in radians) of a number.

atan ^NS2

Math.atan(number)
Returns the arc tangent (in radians) of a number.

atan2 ^NS2

Math.atan2(x,y)
Returns the angle in radians from the X axis to a point.

back ^NS2

history.back()
Loads the previous URL in the history list.

bgColor ^NS2

document.bgColor
A string specifying the color of the document background.

big ^NS2

stringName.big()
Causes a string to be displayed in a big font as if it were in a <BIG> tag.

blink ^{NS2 NS3}

stringName.blink()
Causes a string to blink as if it were in a <BLINK> tag.
NS3: method of Button, Checkbox, FileUpload, Frame, Radio, Reset, Submit and window

blur ^NS2

1. fileUploadName.blur()2. passwordName.blur()3. selectName.blur()4. textName.blur()5. textareaName.blur()6. frameReference.blur()7. windowReference.blur()
Removes focus from the specified object.

bold ^NS2

stringName.bold()
Causes a string to be displayed as bold as if it were in a <B> tag.

Boolean ^NS3

To create a Boolean object:booleanObjectName = new Boolean(value)To use a Boolean object:booleanObjectName.propertyName
Lets you work with Boolean values. The Boolean object is an object wrapper for a boolean value.

border ^NS3_{IE3 NS2}

imageName.border
A string specifying the width, in pixels, of an image border.

Button ^{NS2 NS3}

To use a Button object's properties and methods:1. buttonName.propertyName2. buttonName.methodName(parameters)3. formName.elements[index].propertyName4. formName.elements[index].methodName(parameters)
A pushbutton on an HTML form.
NS3: added type property; added onBlur and onFocus event handlers; added blur and focus methods

caller ^NS2

functionName.caller
Returns the name of the function that invoked the currently executing function.

ceil ^NS2

Math.ceil(number)
Returns the least integer greater than or equal to a number.

charAt ^NS2

stringName.charAt(index)
Returns the character at the specified index.

Checkbox ^{NS2 NS3}

To use a Checkbox object's properties and methods:1. checkboxName.propertyName2. checkboxName.methodName(parameters)3. formName.elements[index].propertyName4. formName.elements[index].methodName(parameters)
A checkbox on an HTML form. A checkbox is a toggle switch that lets the user set a value on or off.
NS3: added type property; added onBlur and onFocus event handlers; added blur and focus methods

checked ^NS2

1. checkboxName.checked2. radioName[index].checked
A Boolean value specifying the selection state of a Checkbox object or radio button.

clearTimeout ^NS2

clearTimeout(timeoutID)
Cancels a timeout that was set with the setTimeout method.

click

1. buttonName.click()2. radioName[index].click()3. checkboxName.click()
Simulates a mouse-click on the calling form element.

close (document object) ^NS2

document.close()
Closes an output stream and forces data sent to layout to display.

close (window object) ^{NS2 NS3}

windowReference.close()
Closes the specified window.
NS3: closes only windows opened by JavaScript. In previous release, the close method closed any window.

closed ^NS3

[windowReference.]closed
Specifies whether a window is closed.

complete ^NS3_{IE3 NS2}

imageName.complete
A boolean value that indicates whether Navigator has completed its attempt to load an image.

confirm ^NS2

confirm("message")
Displays a Confirm dialog box with the specified message and OK and Cancel buttons.

constructor ^NS3_{IE3 NS2}

objectType.constructor
Specifies the function that creates an object prototype.

cookie ^NS2

document.cookie
String value of a cookie, which is a small piece of information stored by the Navigator in the cookies.txt file.

cos ^NS2

Math.cos(number)
Returns the cosine of a number.

current ^NS3_{IE3 NS2}

history.current
A string specifying the complete URL of the current history entry.

Date ^{NS2 NS3}

To create a Date object:1. dateObjectName = new Date()2. dateObjectName = new Date("month day, year hours:minutes:seconds")3. dateObjectName = new Date(year, month, day)4. dateObjectName = new Date(year, month, day, hours, minutes, seconds)To use a Date o
Lets you work with dates and times.
NS3: added prototype property

defaultChecked ^NS2

1. checkboxName.defaultChecked2. radioName[index].defaultChecked
A Boolean value indicating the default selection state of a checkbox or radio button.

defaultSelected ^{NS2 NS3}

selectName.options[index].defaultSelectedoptionName.defaultSelected
A Boolean value indicating the default selection state of an option in a Select object.
NS3: property of Option object

defaultStatus ^NS2

windowReference.defaultStatus
The default message displayed in the status bar at the bottom of the window.

defaultValue ^NS2

1. passwordName.defaultValue2. textName.defaultValue3. textareaName.defaultValue
A string indicating the default value of a Password, Text, or Textarea object.

description ^NS3_{IE3 NS2}

1. navigator.mimeTypes[index1].description2. navigator.plugins[index2].description
A description of a MIME type or plug-in.

document ^{NS2 NS3}

To use a document object's properties and methods:1. document.propertyName2. document.methodName(parameters)
Contains information on the current document, and provides methods for displaying HTML output to the user.
NS3: added onBlur and onFocus syntax; added applets, domain, embeds, and images properties; added Applet, Area, Image, and Plugin objects as properties

domain ^NS3_{IE3 NS2}

document.domain
Specifies the domain name of the server that served a document.

E ^NS2

Math.E
Euler's constant and the base of natural logarithms, approximately 2.718.

elements array ^NS2

1. formName.elements[index]2. formName.elements.length
An array of objects corresponding to form elements (such as checkbox, radio, and Text objects) in source order.

elements property

An array of objects corresponding to form elements (such as Checkbox, Radio, and Text objects) in source order. See the elements array for information.

embeds array ^NS3_{IE3 NS2}

An array reflecting all the <EMBED> tags in a document in source order.

enabledPlugin ^NS3_{IE3 NS2}

navigator.mimeTypes[index].enabledPlugin
The Plugin object for the plug-in that is configured for the specified MIME type.

encoding ^NS2

formName.encoding
A string specifying the MIME encoding of the form.

escape ^NS2

escape("string")
Returns the ASCII encoding of an argument in the ISO Latin-1 character set.

eval ^{NS2 NS3}

[objectName.]eval(string)
The eval method evaluates a string of JavaScript code in the context of the specified object.
NS2: a built-in JavaScript function, not associated with any object, but part of the language itselfNS3: a method of every object

exp ^NS2

Math.exp(number)
Returns enumber, where number is the argument, and e is Euler's constant, the base of the natural logarithms.

fgColor ^NS2

document.fgColor
A string specifying the color of the document (foreground) text.

filename ^NS3_{IE3 NS2}

1. navigator.plugins[index].filename2. navigator.plugins[pluginName].filename
The name of a plug-in file on disk.

FileUpload ^NS3_{IE3 NS2}

To use a FileUpload object's properties and methods:fileUploadName.propertyNamefileUploadName.methodName
A file upload element on an HTML form. A file upload element lets the user supply a file as input.

fixed ^NS2

stringName.fixed()
Causes a string to be displayed in fixed-pitch font as if it were in a <TT> tag.

floor ^NS2

Math.floor(number)
Returns the greatest integer less than or equal to a number.

focus ^{NS2 NS3}_IE3

1. fileUploadName.focus()2. passwordName.focus()3. selectName.focus()4. textName.focus()5. textareaName.focus()6. frameReference.focus()7. windowReference.focus()
Gives focus to the specified object.
NS3: method of Button, Checkbox, FileUpload, Frame, Radio, Reset, Submit and window

fontcolor ^NS2

stringName.fontcolor(color)
Causes a string to be displayed in the specified color as if it were in a <FONT COLOR=color> tag.

fontsize ^NS2

stringName.fontsize(size)
Causes a string to be displayed in the specified font size as if it were in a <FONTSIZE=size> tag.

Form object ^{NS2 NS3}

To use a Form object's properties and methods:1. formName.propertyName2. formName.methodName(parameters)3. forms[index].propertyName4. forms[index].methodName(parameters)
Lets users input text and make choices from Form elements such as checkboxes, radio buttons, and selection lists. You can also use a form to post data to a server.
NS3: added FileUpload object as property; added reset method; added onReset event handler

form property ^NS2

this.formobjectReference.form
An object reference specifying the form containing an object.

forms

An array of objects corresponding to the forms (<FORM> tags) in a document in source order. See the Form object for information.

forward ^NS2

history.forward()
Loads the next URL in the history list.

Frame ^{NS2 NS3}

To use a Frame object's properties:1. [windowReference.]frameName.propertyName2. [windowReference.]frames[index].propertyName3. window.propertyName4. self.propertyName5. parent.propertyNameTo define an onBlur or onFocus event handler for a frame (for fram
A window that can display multiple, independently scrollable frames on a single screen, each with its own distinct URL. Frames can point to different URLs and be targeted by other URLs, all within the same screen. A series of frames makes up a page.
NS3: added blur and focus methods; added onBlur and onFocus event handlers

frames

An array of objects corresponding to child frames (<FRAME> tag) in source order. See the Frame object for information.

Function ^NS3_{IE3 NS2}

To create a Function object:functionObjectName = new Function ([arg1, arg2, ... argn], functionBody)To use a Function object:functionObjectName.propertyName
Specifies a string of JavaScript code to be compiled as a function.

getDate ^NS2

dateObjectName.getDate()
Returns the day of the month for the specified date.

getDay ^NS2

dateObjectName.getDay()
Returns the day of the week for the specified date.

getHours ^NS2

dateObjectName.getHours()
Returns the hour for the specified date.

getMinutes ^NS2

dateObjectName.getMinutes()
Returns the minutes in the specified date.

getMonth ^NS2

dateObjectName.getMonth()
Returns the month in the specified date.

getSeconds ^NS2

dateObjectName.getSeconds()
Returns the seconds in the current time.

getTime ^NS2

dateObjectName.getTime()
Returns the numeric value corresponding to the time for the specified date.

getTimezoneOffset ^NS2

dateObjectName.getTimezoneOffset()
Returns the time-zone offset in minutes for the current locale.

getYear ^NS2

dateObjectName.getYear()
Returns the year in the specified date.

go ^NS2_IE3

history.go(delta
Loads a URL from the history list.

hash ^{NS2 NS3}

1. links[index].hash2. location.hash3. areaName.hash
A string beginning with a hash mark (#) that specifies an anchor name in the URL.
NS3: property of Area

height ^NS3_{IE3 NS2}

imageName.height
A string specifying the height of an image in pixels.

Hidden ^{NS2 NS3}

To use a Hidden object's properties:1. hiddenName.propertyName2. formName.elements[index].propertyName
A Text object that is suppressed from form display on an HTML form. A Hidden object is used for passing name/value pairs when a form submits.
NS3: added type property

history array

An array reflecting all the history entries in a window in source order. See the history object for information.

history object ^{NS2 NS3}

To use a history object:1. history.propertyName2. history.methodName(parameters)3. [windowReference.]history[index]
Contains information on the URLs that the client has visited within a window. This information is stored in a history list and is accessible through the Navigator Go menu.
NS3: added current, next, and previous properties; added history array

host ^{NS2 NS3}

1. links[index].host2. location.host3. areaName.host
A string specifying the server name, subdomain, and domain name.
NS3: property of Area

hostname ^{NS2 NS3}

1. links[index].hostname2. location.hostname3. areaName.hostname
A string containing the full hostname of the server, including the server name, subdomain, domain, and port number.
NS3: property of Area

href ^{NS2 NS3}

1. links[index].href2. location.href3. areaName.href
A string specifying the entire URL.
NS3: property of Area

hspace ^NS3_{IE3 NS2}

imageName.hspace
A string specifying a margin in pixels between the left and right edges of an image and the surrounding text.

Image ^NS3_{IE3 NS2}

To create an Image object:imageName = new Image([width, height])To use an Image object's properties:1. imageName.propertyName2. document.images[index].propertyName3. formName.elements[index].propertyNameTo define an event handler for an Image object creat
An image on an HTML form.

images

An array reflecting all the images in a document in source order. See the Image object for information.

index ^{NS2 NS3}

1. selectName.options[indexValue].index2. optionName.index
An integer representing the index of an option in a Select object.
NS3: property of Option

indexOf ^NS2

stringName.indexOf(searchValue, [fromIndex])
Returns the index within the calling String object of the first occurrence of the specified value, starting the search at fromIndex.

isNaN ^{NS2 NS3}

isNaN(testValue)
Evaluates an argument to determine if it is "NaN" (not a number).
NS3: works on all platforms (in previous releases, worked only on Unix platforms)

italics ^NS2

stringName.italics()
Causes a string to be italic, as if it were in an <I> tag.

javaEnabled ^NS3_{IE3 NS2}

navigator.javaEnabled()
Specifies whether Java is enabled.

join ^NS3_{IE3 NS2}

arrayName.join(separator)
Joins all elements of an array into a string.

lastIndexOf ^NS2

stringName.lastIndexOf(searchValue, [fromIndex])
Returns the index within the calling String object of the last occurrence of the specified value. The calling string is searched backward, starting at fromIndex.

lastModified ^NS2

document.lastModified
A string representing the date that a document was last modified.

length ^{NS2 NS3}

When used with objects:1. formName.length2. frameReference.length3. history.length4. radioName.length5. selectName.length6. stringName.length7. windowReference.length8. arrayName.lengthWhen used with array properties:9. anchors.length10. applet
An integer that specifies a length-related feature of the calling object or array.
NS3: property of applets array, Array object, embeds array, history array, images array, mimeTypes array, plugins array

link method ^NS2

linkText.link(hrefAttribute)
Creates an HTML hypertext link that requests another URL.

Link object ^{NS2 NS3}

To use a Link or Area object's properties:document.links[index].propertyName
A piece of text, an image, or an area of an image identified as a hypertext link. When the user clicks the link text, image, or area, the link hypertext reference is loaded into its target window. Area objects are a type of Link object.
NS3: added onMouseOut event handler; added Area objects; links array contains areas created with <AREA HREF="...">

linkColor ^NS2

document.linkColor
A string specifying the color of the document hyperlinks.

links

An array of objects corresponding to Area and Link objects in source order. See the Link object for information.

LN10 ^NS2

Math.LN10
The natural logarithm of 10, approximately 2.302.

LN2 ^NS2

Math.LN2
The natural logarithm of two, approximately 0.693.

location ^{NS2 NS3}

To use a location object:[windowReference.]location[.propertyName][windowReference.]location.methodName(parameters)
Contains information on the current URL.
NS3: added reload, replace methods; changed the way documents are loaded when location is set

log ^NS2

Math.log(number)
Returns the natural logarithm (base e) of a number.

LOG10E ^NS2

Math.LOG10E
The base 10 logarithm of e (approximately 0.434).

LOG2E ^NS2

Math.LOG2E
The base 2 logarithm of e (approximately 1.442).

lowsrc ^NS3_{IE3 NS2}

imageName.lowsrc
A string specifying the URL of a low-resolution version of an image to be displayed in a document.

Math ^NS2

To use a Math object:1. Math.propertyName2. Math.methodName(parameters)
A built-in object that has properties and methods for mathematical constants and functions. For example, the Math object's PI property has the value of pi.

max ^NS2

Math.max(number1, number2)
Returns the greater of two numbers.

MAX_VALUE ^NS3_{IE3 NS2}

Number.MAX_VALUE
The maximum numeric value representable in JavaScript.

method ^NS2

formName.method
A string specifying how form field input information is sent to the server.

MimeType ^NS3_{IE3 NS2}

To use a MimeType object:navigator.mimeTypes[index].propertyName
A MIME type (Multipart Internet Mail Extension) supported by the client.

mimeTypes

An array of all MIME types supported by the client. See the MimeType object for information.

min ^NS2

Math.min(number1, number2)
Returns the lesser of two numbers.

MIN_VALUE ^NS3_{IE3 NS2}

Number.MIN_VALUE
The smallest positive numeric value representable in JavaScript.

name ^{NS2 NS3}

1. objectName.name2. frameReference.name3. frameReference.frames.name4. radioName[index].name5. imageName.name6. navigator.plugins[index].name7. windowReference.name8. windowReference.frames.name
A string specifying the name of an object.
NS3: property of FileUpload, Form, Image, and Plugin objects

NaN ^NS3_{IE3 NS2}

Number.NaN
A special value representing Not-A-Number. This value is represented as the unquoted literal NaN.

navigator ^{NS2 NS3}

To use a navigator object:1. navigator.propertyName2. navigator.methodName
Contains information about the version of Navigator in use.
NS3: added mimeTypes, plugins properties; added javaEnabled method

Navigator JavaScript reference ^NS2

NEGATIVE_INFINITY ^NS3_{IE3 NS2}

Number.NEGATIVE_INFINITY
A special numeric value representing negative infinity. This value is represented as "-Infinity".

next ^NS3_{IE3 NS2}

history.next
A string specifying the complete URL of the next history entry.

Number ^NS3_{IE3 NS2}

To create a Number object:numberObjectName = new Number()To use a Number object:numberObjectName.propertyName
Lets you work with numeric values. The Number object is an object wrapper for primitive numeric values.

onAbort ^NS3_{IE3 NS2}

An abort event occurs when the user aborts the loading of an image (for example by clicking a link or clicking the Stop button). The onAbort event handler executes JavaScript code when an abort event occurs.See the relevant objects for the

onBlur ^{NS2 NS3}

A blur event occurs when a form element loses focus or when a window or frame loses focus. The blur event can result from a blur method or from the user clicking the mouse on another object or window or tabbing with the keyboard. The onBlur
NS3: event handler of Button, Checkbox, FileUpload, Frame, Password, Radio, Reset, Submit, and window

onChange ^{NS2 NS3}

A change event occurs when a select, text, or textarea field loses focus and its value has been modified. The onChange event handler executes JavaScript code when a change event occurs.Use the onChange event handler to validate data after i
NS3: event handler of FileUpload

onClick ^{NS2 NS3}

A click event occurs when an object on a form is clicked. The onClick event handler executes JavaScript code when a click event occurs.For checkboxes, links, radio buttons, reset buttons, and submit buttons, the onClick event handler can re
NS3: added the ability to return false to cancel the action associated with a click event

onError ^NS3_{IE3 NS2}

An error event occurs when the loading of a document or image causes an error. The onError event handler executes JavaScript code when an error event occurs.An error event occurs only when a JavaScript syntax or runtime error occurs, not wh

onFocus ^{NS2 NS3}

A focus event occurs when a window, frame, or frameset receives focus or when a form element receives input focus. The focus event can result from a focus method or from the user clicking the mouse on an object or window or tabbing with the
NS3: event handler of Button, Checkbox, FileUpload, Frame, Password, Radio, Reset, Submit, and window

onLoad ^{NS2 NS3}

A load event occurs when Navigator finishes loading a window or all frames within a <FRAMESET> tag. The onLoad event handler executes JavaScript code when a load event occurs.Use the onLoad event handler within either the BODY or the
NS3: event handler of Image

onMouseOut ^NS3_{IE3 NS2}

A mouseOut event occurs each time the mouse pointer leaves an area (client-side image map) or link from inside that area or link. The onMouseOut event handler executes JavaScript code when a mouseOut event occurs.If the mouse moves from one

onMouseOver ^{NS2 NS3}

A mouseOver event occurs once each time the mouse pointer moves over an object or area from outside that object or area. The onMouseOver event handler executes JavaScript code when a mouseOver event occurs.If the mouse moves from one area i
NS3: event handler of Area

onReset ^NS3_{IE3 NS2}

A reset event occurs when a user resets a form (clicks a Reset button). The onReset event handler executes JavaScript code when a reset event occurs.See the relevant objects for the onReset syntax.

onSelect ^NS2

A select event occurs when a user selects some of the text within a text or textarea field. The onSelect event handler executes JavaScript code when a select event occurs.See the relevant objects for the onSelect syntax.

onSubmit ^NS2

A submit event occurs when a user submits a form. The onSubmit event handler executes JavaScript code when a submit event occurs.You can use the onSubmit event handler to prevent a form from being submitted; to do so, put a return statement

onUnload ^NS2

An unload event occurs when you exit a document. The onUnload event handler executes JavaScript code when an unload event occurs.Use the onUnload event handler within either the BODY or the <FRAMESET> tag, for example, <BODY onUnlo

open (document object) ^{NS2 NS3}

document.open(["mimeType"])[windowReference.]document.open("text/html","replace")
Opens a stream to collect the output of write or writeln methods.
NS3: added "replace" parameter; document.open() or document.open("text/html") clears the current document if it has finished loading

open (window object) ^NS2_IE3

[windowVar = ][window].open("URL", "windowName", ["windowFeatures"])
Opens a new web browser window.

opener ^NS3_{IE3 NS2}

window.opener
Specifies the window of the calling document when a window is opened using the open method.

Option

A Select object option created using the Option() constructor. For information, see the Select object.

options _IE3

An array corresponding to options in a Select object (OPTION tags) in source order. See the Select object.

parent ^NS2

1. parent.propertyName2. parent.methodName3. parent.frameName4. parent.frames[index]
The parent property is a synonym for a window or frame whose frameset contains the current frame.

parse ^NS2

Date.parse(dateString)
Returns the number of milliseconds in a date string since January 1, 1970, 00:00:00, local time.

parseFloat ^{NS2 NS3}

parseFloat(string)
Parses a string argument and returns a floating point number.
NS3: returns "NaN" on all platforms if the first character of the string specified in parseFloat(string) cannot be converted to a number. In previous releases, it returned "NaN" on Solaris and Irix and zero on all other platforms.

parseInt ^{NS2 NS3}

parseInt(string [,radix])
Parses a string argument and returns an integer of the specified radix or base.
NS3: returns "NaN" on all platforms if the first character of the string specified in parseInt(string) cannot be converted to a number. In previous releases, it returned "NaN" on Solaris and Irix and zero on all other platforms.

Password ^{NS2 NS3}

To use a Password object's properties and methods:1. passwordName.propertyName2. passwordName.methodName(parameters)3. formName.elements[index].propertyName4. formName.elements[index].methodName(parameters)
A text field on an HTML form that conceals its value by displaying asterisks (*). When the user enters text into the field, asterisks (*) hide entries from view.
NS3: added type property; added onBlur and onFocus event handlers

pathname ^{NS2 NS3}

1. links[index].pathname2. location.pathname3. areaName.pathname
A string specifying the url-path portion of the URL.
NS3: property of Area

PI ^NS2

Math.PI
The ratio of the circumference of a circle to its diameter, approximately 3.14159.

Plugin ^NS3_{IE3 NS2}

To use a Plugin object:1. navigator.plugins[index].propertyName2. navigator.plugins[pluginIndex][mimeTypeIndex].mimeTypePropertyName
A plug-in module installed on the client.

plugins

An array of all plug-ins currently installed on the client. See the Plugin object for information.

port ^{NS2 NS3}

1. links[index].port2. location.port3 areaName.port
A string specifying the communications port that the server uses for communications.
NS3: property of Area

POSITIVE_INFINITY ^NS3_{IE3 NS2}

Number.POSITIVE_INFINITY
A special numeric value representing infinity. This value is represented as "Infinity".

pow ^NS2

Math.pow(base, exponent)
Returns base to the exponent power, that is, baseexponent.

previous ^NS3_{IE3 NS2}

history.previous
A string specifying the complete URL of the previous history entry.

prompt ^NS2

prompt(message, [inputDefault])
Displays a Prompt dialog box with a message and an input field.

protocol ^{NS2 NS3}

1. links[index].protocol2. location.protocol3 areaName.protocol
A string specifying the beginning of the URL, up to and including the first colon.
NS3: property of Area

prototype ^NS3_{IE3 NS2}

objectType.prototype.propertyName = value
Defines a property that is shared by all objects of the specified type.

Radio ^{NS2 NS3}

To use a radio button's properties and methods:1. radioName[index1].propertyName2. radioName[index1].methodName(parameters)3. formName.elements[index2].propertyName4. formName.elements[index2].methodName(parameters)
A set of radio buttons on an HTML form. The user can use a set of radio to choose one item from a list.
NS3: added type property; added blur and focus methods

random ^{NS2 NS3}

Math.random()
Returns a pseudo-random number between zero and one. The random number generator is seeded from current time, as in Java.
NS3: works on all platforms. In previous releases, it worked on Unix platforms only.

referrer ^NS2

document.referrer
Specifies the URL of the calling document when a user clicks a link.

refresh ^NS3_{IE3 NS2}

navigator.plugins.refresh([true
Makes newly installed plug-ins available, updates related arrays such as the plugins array, and optionally reloads open documents that contain plug-ins.

reload ^NS3_{IE3 NS2}

location.reload([true])
Forces a reload of the window's current document.

replace ^NS3_{IE3 NS2}

location.replace("URL")
Loads the specified URL over the current history entry.

reset method ^NS3_{IE3 NS2}

formName.reset()
Simulates a mouse click on a reset button for the calling form.

Reset object ^{NS2 NS3}

To use a Reset object's properties and methods:1. resetName.propertyName2. resetName.methodName(parameters)3. formName.elements[index].propertyName4. formName.elements[index].methodName(parameters)
A reset button on an HTML form. A reset button resets all elements in a form to their defaults.
NS3: added type property; added onBlur and onFocus event handlers; added blur and focus methods

reverse ^NS3_{IE3 NS2}

arrayName.reverse()
Transposes the elements of an array: the first array element becomes the last and the last becomes the first.

round ^NS2

Math.round(number)
Returns the value of a number rounded to the nearest integer.

scroll ^NS3_{IE3 NS2}

windowReference.scroll(x-coordinate,y-coordinate)
Scrolls a window to a specified coordinate.

search ^{NS2 NS3}

1. links[index].search2. location.search3. areaName.search
A string beginning with a question mark that specifies any query information in the URL.
NS3: property of Area

select method ^NS2

1. passwordName.select()2. textName.select()3. textareaName.select()
Selects the input area of the specified Password, Text, or Textarea object.

Select object ^{NS2 NS3}

To create an option to add to an existing Select object:optionName = new Option([text, value, defaultSelected, selected])To add the new option to an existing Select object:selectName.options[index1]=optionNameTo delete an option from a Select object:selec
A selection list on an HTML form. The user can choose one or more items from a selection list.
NS3: text property can be changed to change the text of an option; added type property; added Option() constructor and all its properties; added the ability to add and delete options

selected ^{NS2 NS3}

1. selectName.options[index].selected2. optionName.selected
A Boolean value indicating whether an option in a Select object is selected.
NS3: property of Option

selectedIndex ^NS2

1. selectName.selectedIndex2. selectName.options.selectedIndex
An integer specifying the index of the selected option in a Select object.

self ^NS2

1. self.propertyName2. self.methodName
The self property is a synonym for the current window or frame.

setDate ^NS2

dateObjectName.setDate(dayValue)
Sets the day of the month for a specified date.

setHours ^NS2

dateObjectName.setHours(hoursValue)
Sets the hours for a specified date.

setMinutes ^NS2

dateObjectName.setMinutes(minutesValue)
Sets the minutes for a specified date.

setMonth ^NS2

dateObjectName.setMonth(monthValue)
Sets the month for a specified date.

setSeconds ^NS2

dateObjectName.setSeconds(secondsValue)
Sets the seconds for a specified date.

setTime ^NS2

dateObjectName.setTime(timevalue)
Sets the value of a Date object.

setTimeout ^NS2

timeoutID=setTimeout(expression, msec)
Evaluates an expression after a specified number of milliseconds has elapsed.

setYear ^NS2

dateObjectName.setYear(yearValue)
Sets the year for a specified date.

sin ^NS2

Math.sin(number)
Returns the sine of a number.

small ^NS2

stringName.small()
Causes a string to be displayed in a small font, as if it were in a <SMALL> tag.

sort ^NS3_{IE3 NS2}

arrayName.sort(compareFunction)
Sorts the elements of an array.

split ^NS3_{IE3 NS2}

stringName.split([separator])
Splits a String object into an array of strings by separating the string into substrings.

sqrt ^NS2

Math.sqrt(number)
Returns the square root of a number.

SQRT1_2 ^NS2

Math.SQRT1_2
The square root of one-half; equivalently, one over the square root of two, approximately 0.707.

SQRT2 ^NS2

Math.SQRT2
The square root of two, approximately 1.414.

src ^NS3_{IE3 NS2}

imageName.src
A string specifying the URL of an image to be displayed in a document.

status ^NS2

windowReference.status
Specifies a priority or transient message in the status bar at the bottom of the window, such as the message that appears when a mouseOver event occurs over an anchor.

strike ^NS2

stringName.strike()
Causes a string to be displayed as struck-out text, as if it were in a <STRIKE> tag.

String ^{NS2 NS3}

To create a String object:stringObjectName = new String(string)To use a String object:1. stringName.propertyName2. stringName.methodName(parameters)
A series of characters.
NS3: added String() constructor (in previous releases, you construct strings by quoting characters); added prototype property; added split method; added ability to pass strings among scripts in different windows or frames (in previo

sub ^NS2

stringName.sub()
Causes a string to be displayed as a subscript, as if it were in a <SUB> tag.

submit method ^NS2

formName.submit()
Submits a form.

Submit object ^{NS2 NS3}

To use a Submit object's properties and methods:1. submitName.propertyName2. submitName.methodName(parameters)3. formName.elements[index].propertyName4. formName.elements[index].methodName(parameters)
A submit button on an HTML form. A submit button causes a form to be submitted.
NS3: added type property; added onBlur and onFocus event handlers; added blur and focus methods

substring ^NS2

stringName.substring(indexA, indexB)
Returns a subset of a String object.

suffixes ^NS3_{IE3 NS2}

navigator.mimeTypes[index].suffixes
A string listing possible file suffixes (also known as file name extensions) for the MIME type.

sup ^NS2

stringName.sup()
Causes a string to be displayed as a superscript, as if it were in a <SUP> tag.

taint ^NS3_{IE3 NS2}

taint(dataElementName)
Adds tainting to a data element or script.

taintEnabled ^NS3_{IE3 NS2}

navigator.taintEnabled()
Specifies whether data tainting is enabled.

tan ^NS2

Math.tan(number)
Returns the tangent of a number.

target ^{NS2 NS3}

1. formName.target2. links[index].target3. areaName.target
For form, a string specifying the name of the window that responses go to after a form has been submitted. For link, a string specifying the name of the window that displays the content of a clicked hypertext link.
NS3: property of Area

Text object ^{NS2 NS3}

To use a Text object's properties and methods:1. textName.propertyName2. textName.methodName(parameters)3. formName.elements[index].propertyName4. formName.elements[index].methodName(parameters)
A text input field on an HTML form. The user can enter a word, phrase, or series of numbers in a text field.
NS3: added type property

text property ^{NS2 NS3}

1. selectName.options[index].text2. optionName.text
A string specifying the text that follows an <OPTION> tag in a Select object.
NS3: The text property of the options array can be changed and the text displayed by the option in the Select object changes. In previous releases, you could set the text property but the new value was not reflected in the Select ob

Textarea ^{NS2 NS3}

To use a Textarea object's properties and methods:1. textareaName.propertyName2. textareaName.methodName(parameters)3. formName.elements[index].propertyName4. formName.elements[index].methodName(parameters)
A multiline input field on an HTML form. The user can use a textarea field to enter words, phrases, or numbers.
NS3: added type property

title ^NS2

document.title
A string representing the title of a document.

toGMTString ^NS2

dateObjectName.toGMTString()
Converts a date to a string, using the Internet GMT conventions.

toLocaleString ^NS2

dateObjectName.toLocaleString()
Converts a date to a string, using the current locale's conventions.

toLowerCase ^NS2

stringName.toLowerCase()
Returns the calling string value converted to lowercase.

top ^NS2

1. top.propertyName2. top.methodName3. top.frameName4. top.frames[index]
The top property is a synonym for the top-most Navigator window, which is a "document window" or "Web Browser window."

toString ^{NS2 NS3}

objectName.toString()numberObjectName.toString([radix])
Returns a string representing the specified object.
NS3: added radix

toUpperCase ^NS2

stringName.toUpperCase()
Returns the calling string value converted to uppercase.

type ^NS3_{IE3 NS2}

1. objectName.type2. navigator.mimeTypes[index].type
For form elements created with the <INPUT>, <SELECT>, or <TEXTAREA> tags, a string specifying the type of form element. For MimeType objects, the a string specifying the name of the MIME type.

unescape ^NS2

unescape("string")
Returns the ASCII string for the specified value.

untaint ^NS3_{IE3 NS2}

untaint(dataElementName)
Removes tainting from a data element or script.

URL ^NS2

document.URL
A string specifying the complete URL of the document.

userAgent ^NS2

navigator.userAgent
A string representing the value of the user-agent header sent in the HTTP protocol from client to server.

UTC ^NS2

Date.UTC(year, month, day [, hrs] [, min] [, sec])
Returns the number of milliseconds in a Date object since January 1, 1970, 00:00:00, Universal Coordinated Time (GMT).

value ^{NS2 NS3}

1. objectName.value2. radioName[index].value3. selectName.options.[index].value4. fileUploadName.value5. optionName.value
A string that is related to the VALUE attribute of its object.
NS3: property of FileUpload, Option

valueOf ^NS3_{IE3 NS2}

objectName.valueOf()
Returns the primitive value of the specified object.

vlinkColor ^NS2

document.vlinkColor
A string specifying the color of visited links.

vspace ^NS3_{IE3 NS2}

imageName.vspace
A string specifying a margin in pixels between the top and bottom edges of an image and the surrounding text.

width ^NS3_{IE3 NS2}

imageName.width
A string specifying the width of an image in pixels.

window object ^{NS2 NS3}

To define a window, use the open method:windowVar = window.open("URL", "windowName" [,"windowFeatures"])For details on defining a window, see the open (window object) method.To use a window object's properties and methods: 1. window.propertyName 2. window
The top-level object for each document, location, and history object group.
NS3: added closed and opener properties; added blur, focus, and scroll methods; added onBlur, onError, and onFocus event handlers

window property ^NS2

1. window.propertyName2. window.methodName
The window property is a synonym for the current window or frame.

write ^{NS2 NS3}

document.write(expression1 [,expression2], ...[,expressionN])
Writes one or more HTML expressions to a document in the specified window.
NS3: users can print and save generated HTML using the commands on the File menu

writeln ^{NS2 NS3}

document.writeln(expression1 [,expression2], ...[,expressionN])
Writes one or more HTML expressions to a document in the specified window and follows them with a newline character.
NS3: users can print and save generated HTML using the commands on the File menu

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