<!DOCTYPE html> <html class="reftest-wait"> <head> <meta charset="utf-8"/> <title>menclose roundedbox</title> <script type="text/javascript"> function doTest() { var box = document.getElementById("roundedbox").getBoundingClientRect(); r = document.getElementById("box"); r.style.left = (box.left - 6) + "px"; r.style.top = (box.top - 6) + "px"; r.style.width = (box.width - 6) + "px"; r.style.height = (box.height - 6) + "px"; document.documentElement.removeAttribute("class"); } window.addEventListener("MozReftestInvalidate",doTest, false); </script> </head> <body> <div style="position: absolute; left: 20px; top: 20px;"> <math> <menclose id="roundedbox" notation="roundedbox"> <mspace width="200px" height="100px"></mspace> </menclose> </math> </div> <div id="box" style="position: absolute; border:10px solid #000; border-radius:10px 10px 10px 10px;" > </div> </body> </html>