#main {
	width: 540px;
	margin: 0 auto;
}
#canvas_wrapper {
	margin: 10px auto;
	border: 1px solid #555;
	width: 500px;
	height: 500px;
	position: relative;
}
#sub_wrapper {
	width: 500px;
	height: 32px;
	border: 1px solid #555;
}
#canvas_wrapper>canvas{
	position: absolute;
	top: 0;
	left: 0;
}
#cvs0{z-index: 0;}
#cvs1{z-index: 1;}
#cvs2{z-index: 2;}
#cvs3{z-index: 3;visibility: hidden;background: #000;}
#cvs4{z-index: 4;}
#cvstop{z-index:99;}