The Screen object is Internet Explorer 4.0 specific and can be used to determine details about the users screen size and colour depths etc. This can prove useful if content positioning relies on the size of the users screen.
availHeight property returns a value representing the available height of the users screen. This is the
height property, minus that taken by any toolbars (i.e. the taskbar)
availWidth property returns a value representing the available width of the users screen. This is the
width property, minus that taken by any toolbars (e.g. the Office toolbar)
bufferDepth property can be used to set an off screen buffering value. Setting the
bufferDepth to "0", no explicit buffering is set and the
colorDepth property is set to the screen depth. If
bufferDepth is set to "-1" (the default), then off screen buffering is performed at the current screen depth and the
colorDepth property matches the screen depth.
bufferDepth property can be set to 1, 4, 8, 15, 16, 24 or 32, which then causes off screen buffering to occur at the set bit-per-pixel depth. i.e.
bufferDepth=8 performs buffering at 8 bits per pixel, which is 256 colours. Setting the
bufferDepth to any other value causes it to be set to "-1".
Note that when
bufferDepth is "-1", if the user changes their system settings, the
bufferDepth is automatically changed to the new screen depth.
colorDepth property is read-only and reflects the users current system color depth settings, in bits-per-pixel. I.e. 256 colours,
colorDepth=8, 16.7million colours,
Note that the
colorDepth property is dependent on the
bufferDepth property. If
bufferDepth is set to 0 or -1, then
colorDepth is equal to the bits-per-pixel value of the users system settings. However, if the
bufferDepth has been explicitly set to a different value, then the
colorDepth property is equal to the
fontSmoothingEnabled property returns a boolean value indicating whether the user has font smoothing enabled on their system or not.
height property reflects the users current screen height, in pixels.
updateInterval property can be used to set (in mSec), the time between updates for the current viewing window. This is only really a problem when large (size or amount) moving, or continually refreshing images are present in a page.
updateInterval=0 resets the screen update Interval to its default setting, chosen by Internet Explorer.
width property reflects the users current screen width, in pixels.
The Screen Object has no methods.
The Screen Object has no events.
© 1995-1998, Stephen Le Hunte
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