Perfect full screen background image

                                          html {
    background: url("images/background01.jpg") no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    /* IE compatability */    filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='.myBackground.jpg', sizingMethod='scale');
    -ms-filter: "progid:DXImageTransform.Microsoft.AlphaImageLoader(src="https://snipplr.com/view/57510/myBackground.jpg", sizingMethod='scale')";
}