block-negative-1a-dyn2.html (514B)
1 <!DOCTYPE html> 2 <html class="reftest-wait"> 3 <head> 4 <style type="text/css"> 5 #a { 6 height: 20px; 7 background-color: green; 8 margin-bottom: 20px; 9 } 10 #b { 11 height: 20px; 12 background-color: blue; 13 margin-top: 0; 14 } 15 </style> 16 <script type="text/javascript"> 17 function test() { 18 document.getElementById('b').style.marginTop = '-20px'; 19 document.documentElement.removeAttribute('class'); 20 } 21 document.addEventListener('MozReftestInvalidate', test); 22 </script> 23 </head> 24 <body> 25 <div id="a"></div> 26 <div id="b"></div> 27 </body> 28 </html>