<frameset rows="20%,60%,20%">
<frame src="top.html" scrolling="auto"/>
<frameset cols="30%,*">
<frame src="left.html" scrolling="auto">
<frame src="main.html" scrolling="auto">
</frameset>
<frame src="footer.html">
</frameset>
原文：https://www.cnblogs.com/protosstech/p/15228939.html