#seminar_button {
	margin-right: auto;
	margin-left: auto;
	margin-top: 20px;
	width: 241px;
}
#seminar_button a {
	background-image: url(../images/seminar/seminar_button.jpg);
	background-repeat: no-repeat;
	background-position: left top;
	display: block;
	height: 32px;
	width: 241px;
	text-indent: -9999px;
}
#seminar_button a:hover {
	background-image: url(../images/seminar/seminar_button.jpg);
	background-repeat: no-repeat;
	background-position: left -32px;
}