.unit-rating 
{
 list-style:none;
 margin: 0px;
 padding:0px;
 height: 15px;
 position: relative;
 background: url('/images/starrating.gif') top left repeat-x;
}

.unit-rating li
{
 padding:0px;
 margin:0px;
 float: left;
}
	
.unit-rating li.current-rating 
{
 background: url('/images/starrating.gif') left bottom;
 position: absolute;
 height: 15px;
 display: block;
 z-index: 1;
}