JavaScript Object Reference (2)

The document Object

Properties

alinkColor

The color of active links as a string or a hexadecimal triplet.

anchors

Array of anchor objects in the order they appear in the HTML document. Use anchors.length to get the number of anchors in a document.

bgColor

The color of the document's background.

cookie

A string value containing cookie values for the current document.

fgColor

The color of the document's foreground.

forms

Array of form objects in the order the forms appear in the HTML file. Use forms.length to get the number of forms in a document.

lastModified

String value containing the last date of modification of the document.

linkColor

The color of links as a string or a hexadecimal triplet.

links

Array of link objects in the order the hypertext links appear in the HTML document. Use links.length to get the number of links in a document.

location

A string containing the URL of the current document.

referrer

A string value containing the URL of the calling document when the user follows a link.

title

A string containing the title of the current document.

vlinkColor

The color of followed links as a string or a hexadecimal triplet.

Methods

clear()

Clears the document window.

close()

Closes the current output stream.

open(mimeType)

Opens a stream which allows write() and writeln() methods to write to the document window. mimeType is an optional string which specifies a document type supported by JavaScript or a plug-in (i.e. text/html, image/gif, etc.).

write()

Writes text and HTML to the specified document.

writeln()

Writes text and HTML to the specified document followed by a newline character.

The form Object

Properties

action

A string value specifying the URL to which the form data is submitted.

elements

Array of objects for each form element in the order in which they appear in the form.

encoding

String containing the MIME encoding of the form as specified in the ENCTYPE attribute.

method

A string value containing the method of submission of form data to the server.

target

A string value containing the name of the window to which responses to a form are submitted.

Methods

submit()

Submits the form.

Event Handlers

onSubmit

Specifies JavaScript code to execute when the form is submitted. The code should return a true value to allow the form to be submitted. A false value prevents the form from being submitted.

The frame Object

Properties

frames

An array of objects for each frame in a window. Frames appear in the array in the order in which they appear in the HTML source code.

parent

A string indicating the name of the window containing the frameset.

self

A alternative for the name of the current window.

top

An alternative for the name of the top-most window.

window

An alternative for the name of the current window.

Methods

alert(message)

Displays message in a dialog box.

close()

Closes the window.

confirm(message)

Displays message in a dialog box with OK and CANCEL buttons. Returns true or false based on the button clicked by the user.

open(url,name,features)

Opens url in a window named name. If name doesn't exist, a new window is created with that name. features is an optional string argument containing a list of features for the new window. The feature list contains any of the following name-value pairs separated by commas and without additional spaces:

    toolbar=[yes,no,1,0]
    Indicates if the window should have a toolbar

    location=[yes,no,1,0]
    Indicates if the window should have a location field

    directories=[yes,no,1,0]
    Indicates is the window should have directory buttons

    status=[yes,no,1,0]
    Indicates if the window should have a status bar

    menubar=[yes,no,1,0]
    Indicates if the window should have menus

    scrollbars=[yes,no,1,0]
    Indicates if the window should have scroll bars

    resizable=[yes,no,1,0]
    Indicates if the window should be resizable

    width=pixels
    Indicates the width of the window in pixels

    height=pixels
    Indicates the height of the window in pixels

prompt(message,response)

Displays message in a dialog box with a text entry field with the default value of response. The user's response in the text entry field is returned as a string.

setTimeout(expression,time)

Evaluates expression after time where time is a value in milliseconds. The time out can be named with the structure:

        name = setTimeOut(expression,time)

clearTimeout(name)

Cancels the time out with the name name.

The hidden Object

Properties

name

A string value containing the name of the hidden element.

value

A string value containing the value of hidden text element.

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