.cssnav {
position:relative;
font-family: tahoma, arial, helvetica, sans-serif;
background-image: url(roll/navtop-ov.jpg);
background-repeat: no-repeat;
display: block;
width: 101px;
height: 43px;
margin: 0; 
margin-bottom:0px;
padding: 0; 
}
.cssnav a {
display:block;
font-size: 9px;
width: 101px;
height: 43px;
float: left;
margin: 0;
padding: 0;
color: white; text-decoration: none; 
}
.cssnav img {width: 100%; height: 100%; border: 0; }
* html a:hover {visibility:visible}
.cssnav a:hover img{visibility:hidden}
.cssnav span {
	position:absolute;
	left:11px;
	top:16px;
	margin:0px auto 0px auto;
	cursor: pointer;
	width: 99px;
}