#sliderX{
    width: 620px;
    height: 360px;
    margin: 0 auto 10px;
    display: none; /* - Slideshow ein-/ausblenden */
}
#sliderX ul{
    list-style: none;
    position: relative;
}
#sliderX li{
    background-position: top left;
    background-size: contain;
    background-repeat: no-repeat;
    position: absolute;
    top: 0;
    left: 0;
    width: 600px;
    height: 360px;
    opacity:0;
    /*animation-name: fade;
    -webkit-animation-name: fade; */
    -webkit-animation: fade 25s infinite;
    -moz-animation: fade 25s infinite;
    -ms-animation: fade 25s infinite;
    -o-animation: fade 25s infinite;
    animation: fade 25s infinite;
}

@keyframes fade {
  0% , 30% , 100% { opacity:0; }
 10% , 20%        { opacity:1; }
}
/* chrome & Co. */
@-webkit-keyframes fade {
  0% , 30% , 100% { opacity:0; }
 10% , 20%        { opacity:1; }
}

#sliderX li#li_1{
    background-image: url(http://www.fixversand.de/ebay/dema/d41553.jpg);
    animation-delay:0s;
    -webkit-animation-delay: 0s;
}
#sliderX #li_2{
    background-image: url(http://www.fixversand.de/ebay/vorlagen/lieferung_weihnachten.jpg);
    animation-delay:5s;
    -webkit-animation-delay: 5s;
}
#sliderX #li_3{
    background-image: url(http://www.fixversand.de/ebay/dema/d41553_detail2.jpg);
    animation-delay:10s;
    -webkit-animation-delay: 10s;
}
#sliderX #li_4{
    background-image: url(http://www.fixversand.de/ebay/dema/d41553_detail3.jpg);
    animation-delay:15s;
    -webkit-animation-delay: 15s;
}
#sliderX #li_5{
    background-image: url(http://www.fixversand.de/ebay/dema/d41553_detail4.jpg);
    animation-delay:20s;
    -webkit-animation-delay: 20s;
}