##Definition and usage of

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tags in html

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tags Definable title.

defines the largest heading.

Defines the smallest heading.

Since the h element has exact semantics, please carefully choose the appropriate tag level to structure the document. Therefore, please do not use title tags to change the font size within the same line. Instead, we should use cascading style sheet definitions to achieve beautiful display effects.

Examples

Six different HTML headers:

<h1>这是标题 1</h1>
<h2>这是标题 2</h2>
<h3>这是标题 3</h3>
<h4>这是标题 4</h4>
<h5>这是标题 5</h5>
<h6>这是标题 6</h6>

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Differences between HTML and XHTML

In HTML 4.01, the "align" attribute of h1 - h6 elements is deprecated.

In XHTML 1.0 Strict DTD, the "align" attribute of h1 - h6 elements is not supported.

Standard Properties

id, class, title, style, dir, lang, xml:lang

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Event Properties

onclick, ondblclick, onmousedown, onmouseup, onmouseover, 
onmousemove, onmouseout, onkeypress, onkeydown, onkeyup

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Browser Support

All browsers support

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tags.

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