J.4. Headers
Some text in an XHTML document might be more important than other text. For example, the text in this section is considered more important than a footnote. XHTML provides six headers, called header elements, for specifying the relative importance of information. Figure J.2 demonstrates these elements (h1 through h6).
Figure J.2. Header elements h1 tHRough H6.
"http://www.w3.org/1999/xhtml"> 9 10
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1 6 7 8 |
XHTML headers 11 12 13 | 14 15
Level 1 HeaderLevel 2 headerLevel 3 header18 Level 4 header 19Level 5 header 20Level 6 header 21 22 23 |
Header element h1 (line 15) is considered the most significant header and is rendered in a larger font than the other five headers (lines 1620). Each successive header element (i.e., H2, h3, etc.) is rendered in a smaller font.
Portability Tip J.1
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The text size used to display each header element can vary significantly between browsers. |
Look-and-Feel Observation J.1
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Placing a header at the top of every XHTML page helps viewers understand the purpose of each page. |
Look-and-Feel Observation J.2
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Use larger headers to emphasize more important sections of a Web page. |