body {

            width: 100%;

            height: 100%;

            background: url(img/loginbg.png);

            background-size: 100% 100%;

            background-repeat: no-repeat;

            background-position: center;

            background-attachment: fixed;

            background-size: cover;

            -webkit-background-size: cover;

            -moz-background-size: cover;

            -o-background-size: cover;

        }