#contact_button {background:url("contact.jpg") no-repeat; 
width:162px;
height:55;
margin:0;
padding:0;
}

#contact_button span {
display: none;
}

#contact_button li, #contact_button a {
height:55px;
display:block;
}

#contact_button li {
float:left;
list-style:none;
display:inline;
}

#contact_button-01 {width:162px;}

#contact_button-01 a:hover {background:url("contact.jpg") 0px -55px no-repeat;}