.blackboard {
	height: 350px;
	width: 190px;
	background-image: url(images/blackboard.jpg);
	background-repeat: no-repeat;
	font-size: 13px;
	line-height: 18px;
}
.btt {
	font-size: 18px;
	color: #00F;
	font-weight: bold;
}
.btt:hover {
	font-size: 18px;
	color: #FFF;
	font-weight: bold;
	background-color: #60F;
	text-decoration: none;
}
.tc-1 {
	font-size: 15px;
	font-weight: bold;
	color: #FFF;
	background-color: #069;
	text-align: center;
}
.btt-2 {
	font-size: 16px;
	font-weight: bold;
	color: #069;
}
.r100 {
	color: #F00;
}
.c100 {
	color: #00F;
}

.center {
	text-align: center;
}
.b100 {
	color: #000;
}