<!DOCTYPE html> <html class="reftest-wait"> <head> <style type="text/css"> body { font-family: sans-serif; } #inline1 { margin-right: 10px; } #inline2 { display: none; margin-left: 10px; margin-right: 20px; } #inline3 { margin-left: 40px; } </style> <script type="text/javascript"> function test() { document.getElementById('inline2').style.display = 'inline'; document.documentElement.removeAttribute('class'); } document.addEventListener('MozReftestInvalidate', test); </script> </head> <body> <div><span id="inline1">Hello<span id="inline2">my</span></span><span id="inline3">Kitty</span></div> </body> </html>