#but a {
	font-family: "Trebuchet MS";
	font-size: 16px;
	font-weight: bold;
	color: #17534F;
	background-image: url(images/nav_but.gif);
	display: block;
	height: 37px;
	text-align: center;
	text-decoration: none;
	float: left;
	line-height: 0;
	margin: 0 auto;
	background-repeat: no-repeat;
	vertical-align: middle;
	padding: 0;
}
#but a:hover {
	background-image: url(images/nav_but2.gif);
	color: white;
}
#but a:active {
		background-image: url(images/nav_but2.gif);