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Cascading Style Sheets: The Definitive GuideSearch this book

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In effect, this is yet another area where you must remember that total control over document appearance is simply not possible. In this case, it's due to a combination of inconsistent operating system settings and the vagaries of human perception, which is an obstacle no computer is going to overcome any time soon.

It is left to individual authors to decide what chances they wish to take with using named colors, but at least with the specified sixteen colors, there is some moderate hope of consistency. | T | U | V | W | X | Y | Z

Index: Z

z-axis: 9.5. Stacking Positioned Elements
z-index property: 9.5. Stacking Positioned Elements


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The default value of none means about whatyou'd expect: no image is placed in the background. If you wanta background image, then you need only give this property aURL value:

BODY {background-image: url(bg23.gif);}

Due to the default values of otherbackground properties, this will cause the imagebg23.gif to be tiled in the document'sbackground, as shown in Figure 6-22.