.image_references a { 
display: block; 
width: 190px; 
height: 125px; 
background: transparent url(../layout_images/folderWide.jpg) no-repeat; 
}

.image_references a:hover { 
background-position: 0px -125px; 
}

.image_team a { 
display: block; 
width: 130px; 
height: 130px; 
background: transparent url(../layout_images/team.jpg) no-repeat; 
}

.image_team a:hover { 
background-position: 0px -130px; 
}