a.rollover1 {
display: block;
width: 122px;
height: 122px;
background:url(images/projects/projects_thumb_1.jpg) 0 0 no-repeat;
text-decoration: none;
}

a:hover.rollover1 {
background-position: -122px 0;
}

a.rollover2 {
display: block;
width: 122px;
height: 122px;
background:url(images/projects/projects_thumb_2.jpg) 0 0 no-repeat;
text-decoration: none;
}

a:hover.rollover2 {
background-position: -122px 0;
}

a.rollover3 {
display: block;
width: 122px;
height: 122px;
background:url(images/projects/projects_thumb_3.jpg) 0 0 no-repeat;
text-decoration: none;
}

a:hover.rollover3 {
background-position: -122px 0;
}