.border1px{ border: 1px solid black; }
.floatleft {float:left;}
.margin-left-right-auto {
	margin-left: auto;
    margin-right:auto;
	}
.collapsing_margin_breaker{
	width:1px;
	height:1px;
    }
.clear {clear:both;}
.clearfix:before, .clearfix:after {
    content:"";
    display:table;
}
.clearfix:after {
    clear:both;
}
.clearfix {
    zoom:1;