<style>
span. a:link, span. a:visited{
height:px;
width:px;
display:block;
text-indent:-9999px;
//float:left;
position:absolute;
}
#NAV{
position:relative;
}
a:active{-moz-outline-style:none;outline: none;}
a:focus{-moz-outline-style:none;outline: none;}
span.00 a:link,a:visited{background:url()0 0;opacity: 1.0;}
span.00 a:hover{background:url()1px -px;opacity: 1.0;}
span.01 a:hover{background:url() -px -px;opacity: 1.0;}
span.00 a:active{background:url()1px -0px}
span.01 a:active{background:url() -px -0px;opacity: 1.0;}
<!-- Begin buttons -->
<span class="00 "><a href="#">Moose00</a></span>
<!-- End buttons -->
</div>