<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>类选择器</title>
<!--<link type="text/css" href="StyleSheet1.css"/>-->
<style type="text/css">
.center {
text-align: center;
text-transform: uppercase;
white-space: normal;
}
.image {
background-image: url("images/w3school.gif");
padding: 20px;
background-repeat: repeat-y;
}
.spread {
word-spacing: 30px;
}
.tight {
word-spacing: -0.5em;
}
h4 {
letter-spacing: 20px;
text-decoration: underline;
</style>
</head>
<body class="image">
<h1 class="center">
This heading will be center-aligned
</h1>
<h4>This is header 4</h4>
<a href="HTMLPage3.htm">链接</a>
<p class="center">
This paragraph will be center-aligned
</p>
<p class="spread">
This is a paragraph. The spaces between words will be decreased.
</p>
<p class="tight">
This is a paragraph. The spaces between words will be increased.
</p>
</body>
</html>
