<style> .multicol { width: 500px; -moz-column-width: 100px; height: 100px; position: relative; } #clear { position: absolute; } .float { height: 300px; } </style> <div class="multicol"> <div class="float"> <div class="multicol"> <div id="clear"> <div class="float"> <div class="multicol"> <div class="float"> </div> <div class="multicol"> <div class="multicol"> <div class="float">a