.clearfix:after{/*for modern browser*/
    content:".";
    display: block;
    height:0px;
    clear:both;
    line-height:0; 
    visibility:hidden;
    font-size: 0;
}

.clearfix {/*for IE7*/
  min-height: 1px;
}

* html .clearfix {/*for IE6 below, MacIE5*/
  height: 1px;
  /*\*//*/
  height: auto;
  overflow: hidden;
  /**/
}