<!DOCTYPE html> <html class="multicol"> <head> <meta charset="UTF-8"> <style> .multicol { width: 300px; -moz-column-width: 100px; height: 100px; } .R { float:right; } .L { float: left; } .clear { clear: left; } </style> </head> <body><div class="L" style="height: 250px;"></div><div class="clear"></div><div style="margin-bottom: 1em;"></div><div class="L" style="height: 250px;"></div><div><div class="clear"><div class="R"></div></div></div></body> </html>