1.直接加在对象上
<html>
<head>
<title>title</title>
</head>
<body>
<span style="color:red">red</span>
</body>
</html>
2.加到页面头部
<html>
<head>
<title>title</title>
<style>span{color:red}</style>
</head>
<body>
<span>red</span>
</body>
</html>
3.链接外部的样式表文件
<html>
<head>
<title>title</title>
<link href="demo.css" rel="stylesheet" type="text/css">
</head>
<body>
<span>red</span>
</body>
</html>
4.导入外部的样式文件
<html>
<head>
<title>title</title>
<style>@import url (demo.css)</style>
</head>
<body>
<span>red</span>
</body>
</html>
注意：外部CSS文件中不能再包含<style>和</style>。
demo.css文件的代码如下：
span{color:red}
这篇文章是在如下地址看到的：
http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/CSS/Q_23302976.html
首先是HTML部分：
<
body>
<
div id="loading">
<div><img src="../images/loading.gif" /><span>Please Wait</span></div> ......
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gbk" />
......
