.slider-img .next,
.slider-img .prev{
    position: absolute;
    width: 40px;
    height: 60px;
    top: 50%;
    margin-top: -32px;}
.slider-img .prev{background:url(images/prev-next.png) no-repeat;left:5%;}
.slider-img .next{background:url(images/prev-next.png) no-repeat -50px 0;right:5%;}
.ztt img{margin:15px 0 10px;}