.cssnav { 
position: relative;
font-family: arial, helvetica, sans-serif;
background-image: url(overbtn.jpg);
background-repeat: no-repeat;
white-space: nowrap;
display: block;
/*width: 75px;
height: 28px;
*/
margin: 0; 
padding: 0; 
}

.cssnav a {
display: block;
color: #000000;
font-size: 11px;
width: 11px;
height: 4px;
display: block;
float: left;
color: black;
text-decoration: none;
}

.cssnav img {width: 11px; height: 4px; border: 0; }
* html a:hover {visibility:visible}
.cssnav a:hover img{visibility:hidden}

.cssnav span {
position: absolute;
left: 35px;
top: 15px;
margin: 0px;
padding: 0px;
cursor: pointer;
}