<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>框架</title>
</head>
<frameset cols="20%,60%,20%">
<frame src="h1.html"></frame>
<frame src="h2.html"></frame>
<frame src="h3.html"></frame>
</frameset>
</html>
----------------------------------------------------------------------------------------------
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>框架</title>
</head>
<body>
<br/>
<iframe src="h3.html" frameborder="0px" width="800px" height="800px">
</iframe>
</body>
</html>
原文：https://www.cnblogs.com/cxydnxs/p/12269917.html