block-zero-height-1a.html (382B)
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <style type="text/css"> 5 #a { 6 height: 20px; 7 background-color: green; 8 } 9 #b { 10 background-color: green; 11 margin-top: 10px; 12 } 13 #c { 14 margin-top: 20px; 15 margin-bottom: 30px; 16 height: 0; 17 } 18 #d { 19 height: 10px; 20 background-color: red; 21 } 22 </style> 23 </head> 24 <body> 25 <div id="a"></div> 26 <div id="b"> 27 <div id="c"> 28 <div id="d"></div> 29 </div> 30 </div> 31 </body> 32 </html>