.clearfix:after {
        clear: both;
        height: 0;
        
        display: block;
        visibility: hidden;
        
        content: ".";
   	 }	
   
/* accessibility */
     span.accesskey {
         text-decoration: none;
     	}
     	
     .accessibility {
         position: absolute;
         top: -999em;
         left: -999em;
     	}
     	
/* end accessibility */