<!DOCTYPE html> <html> <head> <script type="text/javascript"> function boom() { document.getElementById("select").appendChild(document.createElement("span")); document.documentElement.offsetHeight; document.getElementById("z").appendChild(document.createElement("span")); } </script> </head> <body onload="boom();" style="-moz-column-count: 2; height: 72496331mm;"><fieldset><span id="z"><div><div></div></div><select id="select"></select></span></fieldset></body> </html>