这是基本JavaScript的屏幕对象
screen 屏幕对象 反映了当前用户的屏幕设置。 width 返回屏幕的宽度(像素数)。 height 返回屏幕的高度。 availWidth 返回屏幕的可用宽度(除去了一些不自动隐藏的类似任务栏的东西所占用的宽度)。 availHeight 返回屏幕的可用高度。 colorDepth 返回当前颜色设置所用的位数 - 1:黑白;8:256色;16:增强色;24/32:真彩色 下面是英文的Navigator浏览器的屏幕对象: 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.
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