a.nav {
	font-family: Helvetica, Arial, sans-serif;
	color: #FFFFFF;
	text-align: center;
	background-image: url(1.jpg);
	background-repeat: no-repeat;
	background-position: center top;
	height: 34px;
	width: 100px;
	font-size: 12px;
	padding-top: 7px;
	text-decoration: none;
	display: table;
}

a.nav:hover  {
	background-image: url(2.jpg);
	background-repeat: no-repeat;
	background-position: center top;
}

td.nav {
	height: 34px;
	width: 100px;
}