.cssnav
{
position: relative;
font-family: arial, helvetica, sans-serif;
background: url('buttons/blank%20off.png') no-repeat;
background-color:#eeffcc
}

.cssnav img
{
width: 140px;
height: 30px;
border: 0px none; 
}

* html a:hover
{
visibility:visible
}
.cssnav span
{
position: absolute;
text-align: center;
left: 10px;
top: 10px;
margin: 0px;
padding: 0px;
cursor: hand;
} 
.cssnav a:hover img
{
visibility:hidden
}