JavaScript Object Reference (6)

The textarea Object

Properties

defaultValue

A string value containing the default value of the textarea element (i.e. the value of the VALUE attribute).

name

A string value containing the name of the textarea element.

value

A string value containing the value of the textarea element.

Methods

focus()

Emulates the action of focusing in the textarea field.

blur()

Emulates the action of removing focus from the textarea field.

select()

Emulates the action of selecting the text in the textarea field.

Event Handlers

onBlur

Specifies JavaScript code to execute when focus is removed from the field.

onChange

Specifies JavaScript code to execute when the content of the field is changed.

onFocus

Specifies JavaScript code to execute when focus is given to the field.

onSelect

Specifies JavaScript code to execute when the user selects some or all of the text in the field.

The window Object

Properties

defaultStatus

A string value containing the default value displayed in the status bar.

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.

length

An integer value indicating the number of frames in a parent window.

name

A string value containing the name of the window or frame.

parent

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

self

A alternative for the name of the current window.

status

Used to display a message in the status bar; this is done by assigning values to this property.

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 if 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.

Event Handlers

onLoad

Specifies JavaScript code to execute when the window or frame finishes loading.

onUnload

Specifies JavaScript code to execute when the document in the window or frame is exited.

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