JavaScript: The Definitive Guide, Fourth Edition

Name

Screen — provides information about the display

Availability

JavaScript 1.2

Synopsis

screen

Properties

availHeight

Specifies the available height, in pixels, of the screen on which the web browser is displayed. On operating systems such as Windows, this available height does not include vertical space allocated to semipermanent features, such as the task bar at the bottom of the screen.

availLeft [Netscape 4]

Specifies the leftmost X-coordinate that is not allocated to a semipermanent display feature, such as an application shortcut bar or the Windows 95 task bar.

availTop [Netscape 4]

Specifies the topmost Y-coordinate that is not allocated to a semipermanent display feature, such as an application shortcut bar or the Windows 95 task bar.

availWidth

Specifies the available width, in pixels, of the screen on which the web browser is displayed. On operating systems such as Windows, this available width does not include horizontal space allocated to semipermanent features, such as application shortcut bars.

colorDepth

Specifies the base-2 logarithm of the number of colors allocated by the web browser and available for displaying images. For example, if a browser preallocates 128 colors, screen.colorDepth would be 7. On systems that do not allocate color palettes, this value is the same as the number of bits-per-pixel for the screen.

In IE 4, colorDepth specifies the color depth of the screen in bits-per-pixel, rather than the depth of a preallocated color palette. The ...