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Appendix C. CSS1 Properties

This appendix lists all CSS1 properties, plus the CSS1 pseudo-elements and pseudo-classes. The values to the right of a property name show the browser compatibility information for that property. They will look something like this:

IE4 Y/N IE5 Y/Y NN4 N/N Op3 Y/-

The browsers listed are:

NN4

Netscape Navigator 4

IE4

Internet Explorer 4 (IE4.5 for Macintosh)

IE5

Internet Explorer 5

Op3

Opera 3.6

The first value in each pair is for the Windows version; the second value is for the Macintosh version. (Sorry, Macintosh folks, but we are in the minority.) For instance, IE4 Y/N means that the property is supported in IE4 for Windows, but not IE4 for Macintosh. The possible support values are:

Y

Supported

N

Not Supported

P

Partial Support (may mean that some values are supported and others are not)

Q

Quirky Support (close to the letter of the specification)

B

Buggy Support (may mangle display, or even crash the browser)

-

Not Applicable (browser doesn't exist)

For more detailed information about browser support, including notes on the support ratings, see Appendix D, "CSS Support Chart".

background-positionIE4 Y/Y IE5 Y/Y NN4 N/N Op3 Y/-

This sets the starting position of a background image (defined by the value of background-image). background-position is used to set the origin of the background's tiling, or its position if there is no tiling. Percentage values define not only a point within the element, but also the same point in the origin image itself; see Chapter 6, "Colors and Backgrounds" for more details.

Example

BODY {background-position: top center;}

Values

[<percentage> | <length>]{1,2} | [top | center | bottom] || [left | center | right]

Default

0% 0%

Inherited

no

Applies to

block-level and replaced

Percentage values refer to the size of the element itself as well as the size of the origin image.

font-sizeIE4 P/Q IE5 P/Y NN4 Y/Y Op3 Y/-

This sets the size of the font. This can be defined as an absolute size, a relative size, a length value, or a percentage value. Negative length and percentage values are not permitted. The dangers of font-size assignment are many and varied. Some of these dangers are covered in Chapter 4, "Text Properties".

Example

H2 {font-size: 200%;}
H3 {font-size: 36pt;}

Values

xx-small | x-small | small | medium | large | x-large | xx-large | larger | smaller | <length> | <percentage>

Default

medium

Inherited

yes

Applies to

all elements

Percentage values are relative to the parent element's font size.

text-decorationIE4 P/P IE5 P/P NN4 Q/Q Op3 P/-

This property sets certain effects on the text, such as underline and blink. These decorations will "span" child elements that do not have text decoration defined; see Chapter 4, "Text Properties" for more details. Combinations of the values are legal.

User agents are not required to support the value blink, and in fact only Netscape Navigator 4.x does so.

Example

U {text-decoration: underline;}
.old {text-decoration: line-through;}
U.old {text-decoration: line-through underline;}

Values

none | [ underline || overline || line-through || blink ]

Default

none

Inherited

no

Applies to

all elements



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