a#m1, a#m1:link, a#m1:visited, a#m1:active {
background: transparent url(http://i53.tinypic.com/259ycyt.png) no-repeat left top;
display: block;
height: 54px;
width: 64px;
}
a#m1:hover {background-position: left bottom;}

a#m2, a#m2:link, a#m2:visited, a#m2:active {
background: transparent url(http://i56.tinypic.com/b4jpfp.png) no-repeat left top;
display: block;
height: 54px;
width: 64px;
}