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The Best-Practice Guide to xHTML and CSS phần 3

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Để nhấn mạnh văn bản bên trong một paragraphâ € "hoặc những nơi khác, chẳng hạn như một tiêu đề (xem phần sau) hoặc trong một ô trong bảng (xem Chương 8, â € œTablesâ €) - €" có hai thẻ phù hợp cho công việc: em (nhấn mạnh) và mạnh (sự nhấn mạnh): | 40 chapter 2 text TWO brS DO NOT A p MAKE It is important to remember that a line break is not the same as starting a new paragraph which has been a common misuse of the element two line breaks may give the appearance of starting a new paragraph but when we re talking about HTML appearance doesn t mean a thing. A line break should only be used when there is a logical break in the flow of text such as the new line of an address or a new line in a poem. As you will see later in this chapter the look of paragraphs including the spacing between them can be manipulated should be manipulated and is easier to manipulate with CSS. To emphasize text inside a paragraph or other places such as a heading see next section or in a table cell see Chapter 8 Tables there are two tags fit for the job em emphasis and strong strong emphasis p You lookin at em me em You lookin at strong me strong p NOT i AND b em and strong are not replacements for the old presentational i italic and b bold tags. Although most browsers will display them in italics or bold by default the important thing is that they apply meaning whereas i and b apply only presentation CSS s job . General emphasis is more than a visual thing it can also be vocalized for example whereas bold and italics mean absolutely nothing to a blind person. Headings In most written documents paragraphs make up the bulk of the content but there s usually a need to break things up with headings and subheadings. We ve got six tags to play with here h1 which is the highest level heading h2 h3 h4 h5 and h6 the lowest level subheading . structuring text 41 co www.htmldog.com examples headings1.html The idea is to use the elements in order with a single hl element for the page heading then any number of h2 elements for subheadings any number of h3 elements for sub-subheadings and so on. They should be used in order so for example an h4 should be a subheading of an h3 which should be a subheading of an h2. And remember don t worry if the .