main.html
<html> <frameset cols="120,*"> <frame src="/example/html/html_contents.html"> <frame src="/example/html/frame_a.html" name="showframe"> </frameset> </html>
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html_contents.html
<html> <body> <a href ="/example/html/frame_a.html" target ="showframe">Frame a</a><br> <a href ="/example/html/frame_b.html" target ="showframe">Frame b</a><br> <a href ="/example/html/frame_c.html" target ="showframe">Frame c</a> </body> </html>
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frame_a.html
<html> <body bgcolor="#EBC79E"> <h3>Frame a</h3> </body> </html>
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