.cb-slideshow,
.cb-slideshow:after {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0px;
    left: 0px;
    z-index: 0;
}
.cb-slideshow:after {
    content: '';
    background:  url(../images/pattern.png) repeat top left,
    url(../images/pattern5.png) repeat,
    url(../images/fon/3.jpg) repeat;
    -moz-background-size: 100%; /* Firefox 3.6+ */
    -webkit-background-size: 100%; /* Safari 3.1+ и Chrome 4.0+ */
    -o-background-size: 100%; /* Opera 9.6+ */
    background-size: 100%; /* Современные браузеры */
}