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Appendix B. HTML 2.0 Style Sheet

The style sheet provided in this chapter was excerpted from the CSS1 specification and is included here to give authors an idea of how legacy browser behavior in handling HTML can be reproduced, or at least approximated, using CSS1 rules. A thorough understanding of this style sheet is a good first step to understanding how CSS1 operates. The simpler HTML 2.0 style sheet is reproduced here in order to minimize complexity and possible confusion. A suggested style sheet for HTML 3.2 is also available on the W3C web site, as part of the CSS2 specification.

This HTML 2.0 style sheet was written by Todd Fahrner, in accordance with the suggested rendering in the HTML 2.0 specification:

margin: 1em;
font-family: serif;
line-height: 1.1;
background: white;
color: black;
H1, H2, H3, H4, H5, H6, P, UL, OL, DIR, MENU, DIV,
difference is in the actual syntax of the command and its placement.As you can see, @import is found inside theSTYLE container. It must be placed there, beforethe other CSS rules, or else it won't work at all.

<STYLE TYPE="text/css">@import url(styles.css); /* @import comes first */H1 {color: gray;}</STYLE>

Like LINK, there can be more than one DT, DD, ADDRESS, BLOCKQUOTE, PRE, BR, HR { display: block } B, STRONG, I, EM, CITE, VAR, TT, CODE, KBD, SAMP, IMG, SPAN { display: inline } LI { display: list-item } H1, H2, H3, H4 { margin-top: 1em; margin-bottom: 1em } H5, H6 { margin-top: 1em } H1 { text-align: center } H1, H2, H4, H6 { font-weight: bold } H3, H5 { font-style: italic } H1 { font-size: xx-large } H2 { font-size: x-large } H3 { font-size: large } B, STRONG { font-weight: bolder } /* relative to the parent */ I, CITE, EM, VAR, ADDRESS, BLOCKQUOTE { font-style: italic } PRE, TT, CODE, KBD, SAMP { font-family: monospace } PRE { white-space: pre } ADDRESS { margin-left: 3em } BLOCKQUOTE { margin-left: 3em; margin-right: 3em } UL, DIR { list-style: disc } OL { list-style: decimal } MENU { margin: 0 } /* tight formatting */ LI { margin-left: 3em } DT { margin-bottom: 0 } DD { margin-top: 0; margin-left: 3em } HR { border-top: solid } /* 'border-bottom' could also have been used */ A:link { color: blue } /* unvisited link */ A:visited { color: red } /* visited links */ A:active { color: lime } /* active links */ /* setting the anchor border around IMG elements requires contextual selectors */ A:link IMG { border: 2px solid blue } A:visited IMG { border: 2px solid red } A:active IMG { border: 2px solid lime }

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<P CLASSS="neg"> A paragraph. </P> </DIV>

As we can see from Figure 8-22, the paragraph has simply been pulled upward by its negative top margin, such that it's outside the parent DIV !

Figure 8-22

Figure 8-22. The effects of a negative top margin

With a negative bottom margin, though, it looks as though everything do this correctly. Also, background-color is not inherited. Its default value is transparent , which makes sense; if an element doesn't have a defined color, then its background should be transparent so that the background of its ancestor elements will be visible. Imagine for a moment that the default value were something else, such as silver.