<html> <head> <title>123</title> <style> #sub1{ width:50px; height:80px; border:1px solid #dcdcdc; } #sub2{ position:fixed; top:250px; right:20px; width:50px; height:80px; border:1px solid #dcdcdc; margin-top:5px; } #sub3{ width:250px; height:880px; border:1px solid #dcdcdc; margin-top:5px; } </style> </head> <body> <div id="parent"> <div id="sub1">sub1</div> <div id="sub2">sub2</div> <div id="sub3">sub1</div> </div> </body> </html>
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