Classic CSS Clearfix
.clearfix:after{display:block;content:".";clear:both;visibility:hidden;line-height:0;height:0}
.clearfix{display:inline-block}
html[xmlns] .clearfix{display:block}
* html .clearfix{height:1%}
2011 Updated Clearfix
.clearfix:before,
.container:after{display:table;content:""}
.clearfix:after{clear:both}
/* IE 6/7 */
.clearfix{zoom:1}
