block-sibling-2-ref2.html (391B)
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <style type="text/css"> 5 #red { 6 height: 20px; 7 background-color: red; 8 } 9 #green { 10 height: 20px; 11 background-color: green; 12 } 13 #blue { 14 height: 20px; 15 background-color: blue; 16 } 17 .margin { 18 height: 20px; 19 } 20 </style> 21 </head> 22 <body> 23 <div id="red"></div> 24 <div class="margin"></div> 25 <div id="green"></div> 26 <div class="margin"></div> 27 <div id="blue"></div> 28 </body> 29 </html>