canvas, img {
    image-rendering: optimizeSpeed;
    image-rendering: -moz-crisp-edges;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: optimize-contrast;
    -ms-interpolation-mode: nearest-neighbor;
}
html, body {
  width:  100%;
  height: 100%;
  margin: 0px;
}
#containingDiv {
  overflow: hidden;
}
.myCanvas {
  position: absolute;
  top: 0px;
  left: 0px;
}
.bck{
    position:absolute;
    left:0px;
	top:0px;
    width:100%;
    height:100%;
    background-color: #000000;
}
.actionpanel{
    position:absolute;
    left:0px;
    top:200px;
    width:200px;
    height:400px;
    background-color: #000000;
}

.btn_helpstart{
	position:absolute;
	left:10px;
	top:480px;
    width:150px;
}

.btn_about{
	position:absolute;
    left:10px;
	top:530px;
    width:150px;
}