CSSハック

clearfix.css

/* Clearfix */
.clearfix:after {
  content: ".";
  display: block;
  clear: both;		
  height: 0;
  visibility: hidden;
}

.clearfix {
  min-height: 1px;
}

* html .clearfix {
  height: 1px;
  /*\･*//*/
  height: auto;
  overflow: hidden;
  /**/
}