@keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Firefox < 16 */
@-moz-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Safari, Chrome and Opera > 12.1 */
@-webkit-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Internet Explorer */
@-ms-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes fadeout {
    from { opacity: 1; }
    to   { opacity: 0; }
}

/* Firefox < 16 */
@-moz-keyframes fadeout {
    from { opacity: 1; }
    to   { opacity: 0; }
}

/* Safari, Chrome and Opera > 12.1 */
@-webkit-keyframes fadeout {
    from { opacity: 1; }
    to   { opacity: 0; }
}

/* Internet Explorer */
@-ms-keyframes fadeout {
    from { opacity: 1; }
    to   { opacity: 0; }
}