<html> <head> <script> function boom() { var tbody = document.getElementById("tbody"); tbody.style.overflow = "auto"; document.body.offsetWidth; tbody.style.overflow = ""; } </script> </head> <body onload="boom();"> <table border="1"> <tbody id="tbody"> <tr> <td> <p>A</p> <p style="height: 18000000px">B</p> </td> </tr> </tbody> </table> </body> </html>