.clearfix:after {  /* for Firefox, IE8, Opera, Safari, etc. */ 
    content: ".";  
    display: block;  
    height: 0;  
    clear: both;  
    visibility: hidden;  
 
}  
    
 
* + html .clearfix { /* for IE7 */ 
    display: inline-block;  
}  
    
 
* html .clearfix { /* for IE6 */ 
    height: 1%;  
}