br.clear_noheight {
	clear: both;
	line-height: 0;
	display: block;
}
br.noheight {
  line-height: 0;
  display: block;
  height: 0;
}

.clear { clear: both; }

.center { text-align: center; }
.left { text-align: left; float:left }
.right { text-align: right; float:right }

div.half_group {
	float: left;
	width: 50%;
}
div.one_third_group {
	float: left;
	width: 33.33%;
}
div.two_thirds_group {
	float: left;
	width: 66.66%;
}
div.one_fifth_group {
	float: left;
	width: 20%;
}
div.two_fifths_group {
	float: left;
	width: 40%;
}
div.three_fifths_group {
	float: left;
	width: 60%;
}