#mainbody399 {
    display: none;
    z-index:10;
    position:fixed;
    top: calc(15vw/19.20);
    left: calc(0vw/19.20);
    width: calc(1425vw/19.20);
    height: calc(985vw/19.20);
}
#videocontainer399 {
    position: fixed;
    left: calc(0vw/19.20);
    top: calc(0vh/10.80);
    z-index:10;
}
#myCanvas399 {
    background-color: #ffffff;
}