hello word:
<!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=utf-8" />
<title>hello word</title>
</head>
<body bgcolor="#000000"text="#00FF00"
<center>
<h1>这是一个演示程序</hi>
</center>
<hr width=80%>
<p>本页显示黑色北京绿色文本<p>
</body>
</html>
css练习：
<html>
<head>
<title>css演示程序</title>
<style>
p{
font-size:30px;
color:yellow;
border::2px solid blue;
text-align:center;
background-color:green;
}
</style>
</head>
<body>
<p>Llinux</p>
<p>Apache</p>
<p>Mysql</p>
<p>php</p>
</body>
</html>