#scrollUp {
background: url(//www.kinamed.com/wordpress/wp-content/plugins/scroll-up/img/top.png);
background-repeat: no-repeat;
bottom: 9px;
display: block;
height: 38px;
right: 12px;
width: 40px;
outline: medium none;
}
#scrollUp:hover {
margin-bottom: 0;
}