403569-1.xhtml (492B)
1 <html xmlns="http://www.w3.org/1999/xhtml"> 2 <head> 3 <style> 4 5 #a { 6 column-count: 2; 7 column-width: 100px; 8 float: left; 9 border: 2px solid magenta; 10 height: 200px; 11 } 12 13 #b { 14 column-count: 2; 15 column-width: 100px; 16 float: left; 17 border: 2px solid green; 18 height: 300px; 19 } 20 21 </style> 22 </head> 23 24 <body onload="document.getElementById('span').style.display = '-moz-inline-box';"> 25 26 <div id="a"><div id="b"></div><optgroup label="foo"><span id="span"></span></optgroup></div> 27 28 </body> 29 </html>