.cf:after{
    content:".";
    display:block;
    height:0;
    clear:both;
    visibility:hidden;
}

.cf{
    display:inline-block;
    min-height:1%;  /* for IE 7*/
}

/* Hides from IE-mac \*/
* html .cf{height: 1%;}
.cf{display: block;}
/* End hide from IE-mac */