block-negative-5-ref2.html (301B)
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <style type="text/css"> 5 html, body { 6 margin: 0; padding: 5px; 7 } 8 div { 9 height: 20px; 10 } 11 #positive { 12 background-color: blue; 13 } 14 #negative { 15 background-color: green; 16 } 17 </style> 18 </head> 19 <body> 20 <div id="positive"></div> 21 <div></div> 22 <div id="negative"></div> 23 </body> 24 </html>