html+css实现星级评价

.star_bg {
    width: 150px;
    height: 26px;
    background: url(/*星星图片*/) repeat-x;
    position: absolute;
    right: 15px;
    bottom: 23px;
    z-index: 999;   
    overflow: hidden;
}
.star {
    height: 100%;
    width: 30px;
    margin-right: 10px;
    line-height: 10em;
    position: absolute;
    z-index: 3;
}
.star:hover {    
    background: url(/*星星图片*/) repeat-x 0 -27px!important; left: 0; z-index: 2; .star_bg {
    width: 150px;
    hei