.imgback {
 position:relative; top:0; left:0; z-index:1;
}

.imgfront {
 visibility: hidden;
 opacity: 0;
 position:absolute; top:0; left:0; z-index:2;
}

.audiosteuerung {
 position:absolute; top:0; left:0; z-index:2;
}

td {
position: relative;
}
.fader {
//animation: name duration timing-function delay iteration-count direction fill-mode play-state;
opacity: 0;
visibility: visible;

position:absolute; top:0; left:0; z-index:2;

animation: fadeing 2s ease-in-out 0s infinite;
-webkit-animation: fadeing 2s ease-in-out 0s infinite;
-moz-animation: fadeing 2s ease-in-out 0s infinite;
-o-animation: fadeing 2s ease-in-out 0s infinite;
-ms-animation: fadeing 2s ease-in-out 0s infinite;
}

@keyframes fadeing {
0% {opacity:0;}
50% {opacity:1;}
100% {opacity:0;}
}

@-moz-keyframes fadeing {
0% {opacity:0;}
50% {opacity:1;}
100% {opacity:0;}
}

@-webkit-keyframes fadeing {
0% {opacity:0;}
50% {opacity:1;}
100% {opacity:0;}
}

@-o-keyframes fadeing {
0% {opacity:0;}
50% {opacity:1;}
100% {opacity:0;}
}

@-ms-keyframes fadeing {
0% {opacity:0;}
50% {opacity:1;}
100% {opacity:0;}
}