aaa.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<style>body{text-align: center;}</style>
<body bgcolor="aqua">
<h2>邮箱</h2>
</body>
</html>
bbb.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<a href="ddd.html" target="aaa">收件箱</a><br /><br />
<a href="#">写邮件</a><br /><br />
<a href="#">草稿箱</a><br /><br />
</body>
</html>
ccc.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
</body>
</html>
ddd.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<style>body{text-align: center;}</style>
<body>
<font size="4" >您在本月的1号购买了火车票</font>
</body>
</html>
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<frameset rows="15%,*">
<frame src="aaa.html" />
<frameset cols="15%,*">
<frame src="bbb.html" />
<frame src="ccc.html" name="aaa"/>
</frameset>
</frameset>
</html>
点击收件箱,展示效果
