<!DOCTYPE html> <html class="reftest-wait"> <head> <style> div { position: absolute; padding: 2px; left: 100px; top: 700px; width: 100px; height: 100px; background: yellow; -moz-transform: scale(1.5); transform: scale(1.5); } body.toggle div { -moz-transform: translate(0, -400px); transform: translate(0, -400px); } </style> </head> <body> <div>Hello</div> <script> function doTest() { document.body.setAttribute("class", "toggle"); document.documentElement.removeAttribute("class"); } window.addEventListener("MozReftestInvalidate", doTest, false); </script> </body> </html>