.cssnav {
position: relative;
font-family: arial, helvetica, sans-serif;
background-image: url(../images/overbtn.jpg);
background-repeat: no-repeat;
white-space: nowrap;
display: block;
color: gold;
font-size: 13px;
font-weight: bold;
width: 150px;
height: 25px;
margin: 0;
padding: 0;

}

.cssnav a {
display: block;
color: #ffffff;
background-repeat: no-repeat;
font-size: 13px;
font-weight: bold;
width: 150px;
height: 25px;
display: block;
float: left;
color: white;
margin: 0;
padding: 0;
text-decoration: none;
}

.cssnav img {width: 150px; height: 25px;  border: 0; }
* html a:hover {visibility:visible}
.cssnav a:hover img{visibility:hidden}

.cssnav span {
position: absolute;
left: 20px;
top: 3px;
margin: 0px;
padding: 0px;
cursor: pointer;
}