CSS伪类的效果
<html>
<head>
<style type="text/css">
a.one:link {color: #ff0000}
a.one:visited {color: #0000ff}
a.one:hover {color: #ffcc00}
a.two:link {color: #ff0000}
a.two:visited {color: #0000ff}
a.two:hover {font-size: 150%}
a.three:link {color: #ff0000}
a.three:visited {color: #0000ff}
a.three:hover {background: #66ff66}
a.four:link {color: #ff0000}
a.four:visited {color: #0000ff}
a.four:hover {font-family: monospace}
a.five:link {color: #ff0000; text-decoration: none}
a.five:visited {color: #0000ff; text-decoration: none}
a.five:hover {text-decoration: underline}
</style>
</head>
<body>
<p>请把鼠标移动到这些链接上，以查看效果：</p>
<p><b><a class="one" href="/index.html" target="_blank">这个链接改变颜色</a></b></p>
<p><b><a class="two" href="/index.html" target="_blank">这个链接改变字体大小</a></b></p>
<p><b><a class="three" href="/index.html" target="_blank">这个链接改变背景颜色</a></b></p>
<p><b><a class="four" href="/index.html" target="_blank">这个链接改变字体系列</a></b></p>
<p><b><a class="five" href="/index.html" target="_blank">这个链接改变文本装饰</a></b></p>
</body>
</html>