.center { text-align: center; }
.clear { clear: both; }
.empty { 
	background-color: transparent ! important;
	color: transparent ! important;
	visibility: hidden ! important; }
.indent { text-indent: 20px; }
.left { float: left; width: auto; }
.right { float: right; width: auto; }
.unfloat { float: none; width: auto; }