.slide_photo {
    transition: background-image .5s ease;
    /*-webkit-animation: fade 10s infinite;
    -moz-animation: fade 10s infinite;
    -o-animation: fade 10s infinite;
    animation: fade 10s infinite;*/
}
@-webkit-keyframes fade {
    0% {
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}
@-moz-keyframes fade {
    0% {
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}
@-o-keyframes fade {
    0% {
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}
@keyframes fade {
    0% {
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}