JavaScript getting started tutorial (5) js Screen Object

The screen Object reflects the screen settings of the current user.
Width returns the screen width (number of rows ).
Height returns the screen height.
AvailWidth returns the available width of the screen (excluding the width occupied by some things like the taskbar that are not automatically hidden ).
AvailHeight returns the available height of the screen.
ColorDepth returns the number of digits used in the current color settings-1: black and white; color; 16: enhanced color; 24/32: true color
The following is the Screen Object of the English Navigator browser:
AvailHeight: minus permanent or semipermanent user interface features displayed by the operating system: such as the Taskbar on Windows.
AvailWidth: Specifies the width of the screen, in pixels, minus permanent or semipermanent user interface: features displayed by the operating system, such as the Taskbar on Windows.
ColorDepth: The bit depth of the color palette, if one is in use; otherwise, the value is derived from screen. pixelDepth.
Height: Display screen height.
PixelDepth: Display screen color resolution (bits per pixel ).
Width: Display screen width.