.spacer{
	width: 100%;
	height: 0px;
	clear:both;
	margin: 0;
	padding: 0;
}

.halfblock{
	width: 50%;
	float: left;
}
.thirdblock{
	width: 33%;
	float: left;
}
.twothirdsblock{
	width: 67%;
	float: left;
}
.quarterblock{
	width: 25%;
	float: left;
}
.threequartersblock{
	width: 75%;
	float: left;
}
.fifthblock{
	width: 20%;
	float: left;
}
.twofifthsblock{
	width: 40%;
	float: left;
}
.threefifthsblock{
	width: 60%;
	float: left;
}
.fourfifthsblock{
	width: 80%;
	float: left;
}

.darkblock{
  margin: 10px;
  padding: 20px;	
}
.lightblock{
  padding: 20px;		
}
.transparentblock{
  margin: 0px;
  padding: 20px;			
}

.title{
	text-align: left;
}

.center{
	text-align: center;
}