body, html {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
    -moz-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
}
canvas {
    -moz-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
    position:absolute;
}