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Authors: Chuck Musciano Bill Kennedy

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    B.1 HTML 4.0 Core

    C. Cascading Style Sheet

    Attributes

    Properties Quick Reference

    Appendix C

     

    C. Cascading Style Sheet Properties

    Quick Reference

    In the following table, we list in alphabetical order all the properties defined in the World Wide Web Consortium's Recommended Specification for Cascading Style Sheets, Level 1

    (
    http://www.w3.org/pub/WWW/TR/REC-CSS1
    ).

    NOTE:
    Graphic We know that browser support of style sheets will change faster than we can reprint this book, so we have created a separate "compliance document" that you can use to determine how style sheets are implemented by the latest releases of the
    browsers. You can find this document at http://www.oreilly.com/catalog/html3/
    .

    Whenever that document and this appendix differ, the document should be considered more accurate. In this printing, we cover Netscape Navigator 4.05 and Internet Explorer 4.0. Graphic

    As in other sections of this book, we use the Netscape and Internet Explorer icons to the far right of each property to show which browser supports that property. Properties with no icons are not currently supported by any browser.

    We also include the number of the section in this book that fully defines the property.

    We include each property's possible values, defined as either an explicit keyword (shown in constant width) or as one of these values: color

    Either a color name or hexadecimal RGB value, as defined in Appendix F, Color Names and

    Values
    , or an RGB triple of the form: rgb(red, green, blue)

    where
    red
    ,
    green
    , and
    blue
    are either numbers in the range 0 to 255 or percentage values indicating the brightness of that color component. Values of 255 or 100% indicate that the corresponding color component is at its brightest; values of 0 or 0% indicate that the corresponding color component is turned completely off. For example: rgb(27, 119, 207)

    rgb(50%, 75%, 0%)

    are both valid color specifications.

    length

    An optional sign (either + or -) immediately followed by a number (with or without a decimal point) immediately followed by a two-character unit identifier. For values of zero, the unit identifier may be omitted.

    The unit identifiers em and ex refer to the overall height of the font and to the height of the letter "x", respectively. The unit identifier px is equal to a single pixel on the display device.

    The unit identifiers in, cm, mm, pt, and pc refer to inches, centimeters, millimeters, points, and picas, respectively. There are 72.27 points per inch, and 12 points in a pica.

    number

    An optional sign, immediately followed by a number (with or without a decimal point).

    percent

    An optional sign, immediately followed by a number (with or without a decimal point), immediately followed by a percent sign. The actual value is computed as a percentage of some other element property, usually the element's size.

    url

    The keyword url, immediately followed (no spaces) by a left parenthesis, followed by a URL

    optionally enclosed in single or double quotes, followed by a matching right parenthesis. For example:

    url("http://members.aol.com/htmlguru") is a valid URL value.

    Finally, some values are lists of other values and are described as a "list of" some other value. In these cases, a list consists of one or more of the allowed values, separated by commas.

    If there are several different values allowed for a property, these alternative choices are separated by vertical bars (|).

    If the standard defines a default value for the property, that value is underlined.

    background

    Composite property for the

    9.3.4.6

    Graphic

    background-attachment,

    Graphic

    background-color,

    background-image,

    background-position, and

    background-repeat

    properties; value is any of these

    properties' values, in any order

    background-attachment scroll | fixed Determines if the background 9.3.4.1

    Graphic

    image is fixed in the window or

    scrolls as the document scrolls

    background-color

    color
    |

    Sets the background color of an

    9.3.4.2

    Graphic

    transparent

    element

    Graphic

    background-image

    url
    | none

    Sets the background image of an

    9.3.4.3

    Graphic

    element

    Graphic

    background-position

    percent
    |
    length
    |

    Sets the initial position of the

    9.3.4.4

    Graphic

    top | center |

    element's background image, if

    bottom | left |

    specified; values are normally

    right

    paired to provide x, y positions.

    Default position is 0% 0%

    background-repeat

    repeat |

    Determines how the background

    9.3.4.5

    Graphic

    repeat-x |

    image is repeated (tiled) across

    Graphic

    repeaty |

    an element

    no-repeat

    border

    Sets all four borders on an

    9.3.6.6

    Graphic

    element; value is one or more of

    Graphic

    a
    color
    , a value for

    border-width, and a value

    for border-style

    border-bottom

    Sets the bottom border on an

    9.3.6.6

    Graphic

    element; value is one or more of

    a
    color
    , a value for

    border-bottom-width, and

    a value for border-style

    border-bottom-width

    length
    | thin |

    Sets the thickness of an element's 9.3.6.4

    Graphic

    medium | thick

    bottom border

    Graphic

    bordercolor

    color

    Sets the color of all four of an

    9.3.6.3

    Graphic

    element's borders; default is the

    color of the element

    border-left

    Sets the left border on an

    9.3.6.6

    Graphic

    element; value is one or more of

    a
    color
    , a value for

    border-left-width, and a

    value for border-style

    border-left-width

    length
    | thin |

    Sets the thickness of an element's 9.3.6.4

    Graphic

    medium | thick

    left border

    Graphic

    border-right

    Sets the right border on an

    9.3.6.6

    Graphic

    element; value is one or more of

    a
    color
    , a value for

    border-right-width, and a

    value for border-style

    border-right-width

    length
    | thin |

    Sets the thickness of an element's 9.3.6.4

    Graphic

    medium | thick

    right border

    Graphic

    border-style

    dashed |

    Sets the style of all four of an

    9.3.6.5

    Graphic

    dotted |

    element's borders

    Graphic

    double |

    groove | inset

    | none | outset

    | ridge | solid

    border-top

    Sets the top border on an

    9.3.6.6

    Graphic

    element; value is one or more of

    a
    color
    , a value for

    border-top-width, and a

    value for border-style

    border-top-width

    length
    | thin |

    Sets the thickness of an element's 9.3.6.4

    Graphic

    medium | thick

    top border

    Graphic

    border-width

    length
    | thin |

    Sets the thickness of all four of

    9.3.6.4

    Graphic

    medium | thick

    an element's borders

    Graphic

    clear

    both | left |

    Sets which margins of an

    9.3.6.7

    Graphic

    none | right

    element must not be adjacent to a

    Graphic

    floating element; the element

    will be moved down until that

    margin is clear

    color

    color

    Sets the color of an element

    9.3.4.7

    Graphic

    Graphic

    display

    block | inline

    Controls how an element is

    9.3.8.1

    Graphic

    | list-item |

    displayed

    none

    float

    left | none |

    Determines if an element will

    9.3.6.8

    Graphic

    right

    float to the left or right, allowing

    Graphic

    text to wrap around it, or be

    displayed inline (using none)

    font

    Sets all the font attributes for an

    9.3.3.6

    Graphic

    element; value is any of the

    Graphic

    values for fontstyle
    ,

    font-variant,

    font-weight, fontsize,

    line-height, and

    font-family, in that order

    font-family

    list of font names

    Define the font for an element,

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