html, body{
    height: 100%;
    width: 100%;
    overflow: hidden;
}

#gamecanvas{
    z-index: 200;
    position: absolute;
    top: 0px;
    left: 0px;
    /*display: block;*/
    /*margin: auto;*/
    /*border: 5px solid black;*/
    height: 100%;
    width: 100%;
}

#bgcanvas{
    z-index: 10;
    position: absolute;
    top: 0px;
    left: 0px;
    /*display: block;*/
    /*margin: auto;*/
    /*border: 5px solid black;*/
    height: 100%;
    width: 100%;
}