.fl {
	float: left;
	display: inline;
}

.fr {
	float: right;
	display: inline;
}

.clr {
	clear: both;
	visibility: hidden;
}

.ctr {
	margin: 0 auto;
	display: block;
}

.rel {
	position: relative;
}

.abs {
	position: absolute;
}