.aa , .bb {
background-image:url(a.png);
background-repeat: no-repeat;
text-indent:-999em;
}
.aa {
width:36px;
height:36px;
background-position: 0 0;
}
.bb {
width:14px;
height:16px;
background-position: 0 -56px;
}
</style>
<body>
<div class="aa"></div>
<div class="bb"></div>
</body>
file: a.png