.starRating input {
    display: none
}

.starRating label {
    width: 18px;
    height: 16px;
    display: inline-block;
    text-indent: -9999px;
    background: url(../DnnForge\ -\ NewsArticles/Images/rating_stars.png) -155px -32px
}

.starRating label.on {
    background-position: -155px -76px
}