a.lefts {
	text-decoration: none;
	background-image: url(../images/button/left.gif);
	color: Blue;
	font-family: Book Antiqua,Lucida,Arial,Helvetica,sans-serif;
	font-size: small;
	background-repeat: no-repeat;
	line-height: 26px;
	width: 195px;
	height: 26px;
}
a.lefts:visited {
	text-decoration: none;
	background-image: url(../images/button/left.gif);
	color: Blue;
	font-family: Book Antiqua,Lucida,Arial,Helvetica,sans-serif;
	font-size: small;
	background-repeat: no-repeat;
	line-height: 26px;
	width: 195px;
	height: 26px;
}
a.lefts:hover {
	text-decoration: none;
	background-image: url(../images/button/left_u.gif);
	color: #4682B4;
	font-family: Book Antiqua,Lucida,Arial,Helvetica,sans-serif;
	font-size: small;
	background-repeat: no-repeat;
	line-height: 26px;
	width: 195px;
	height: 26px;
}

<a href="conf.php" class="lefts">Конференции</a><br>
	 <a href="grouphtl.php" class="lefts">Отдых</a><br><br>
	 <a href="reqsend.php" class="lefts">Заявки в корзине</a><br>

a.lefts:link,a.lefts:visited,a.lefts:active {display: block;}