<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Content Appended in Pagination before ::after</title> <style type="text/css"> body { font-size: 16px; } #colset { height: 200px; width: 450px; -moz-column-width: 150px; -moz-column-gap: 0; -moz-column-fill: auto; border: 3px solid silver; } #shift { height: 201px; border-bottom: 2px solid blue; } #overflow { height: 500px; } div:not([id]) { border-top: 2px solid blue; } #x { border-bottom: 4px solid blue; } </style> </head> <body onload="document.getElementById('span').insertBefore(document.createElement('div'), document.getElementById('x'))"> <div id="colset"> <span id="span"> <div id="shift"> <div id="overflow"></div> </div ><div id="x">This must be in the second column between two 4px blue lines.</div ></span ></div> </body> </html>