index.html
<html><frameset rows="20%,20%,60%"> <frameset rows="30%,70%" frameborder="yes" border="1" framespacing="1"> <frame src="a.html"/> <frame src="b.html"/> </frameset> <frameset cols="40%,60%" frameborder="yes" framespacing="1"> <frame src="c.html"/> <frame src="d.html"/> </frameset> <frameset cols="20%,80%" frameborder="yes" framespacing="1"> <frame src="e.html"/> <frame name="showframe"/> </frameset></frameset></html>e.html
<html>this is e <br><a rel="external nofollow" href="a.html" target="showframe">Frame a</a><br><a rel="external nofollow" href="b.html" target="showframe">Frame b</a><br><a rel="external nofollow" href="c.html" target="showframe">Frame c</a><br><a rel="external nofollow" href="d.html" target="showframe">Frame d</a></html> 效果(a,b,c,d页面显示还是非常奇怪)